{"id":6811,"date":"2026-02-06T01:26:03","date_gmt":"2026-02-05T17:26:03","guid":{"rendered":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/"},"modified":"2026-02-06T01:26:03","modified_gmt":"2026-02-05T17:26:03","slug":"mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5","status":"publish","type":"post","link":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/","title":{"rendered":"ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09"},"content":{"rendered":"<div class=\"group w-full text-gray-800 dark:text-gray-100 border-b border-black\/10 dark:border-gray-900\/50 bg-gray-50 dark:bg-[#444654]\">\n<div class=\"text-base gap-4 md:gap-6 md:max-w-2xl lg:max-w-2xl xl:max-w-3xl p-4 md:py-6 flex lg:px-0 m-auto\">\n<div class=\"relative flex w-[calc(100%-50px)] flex-col gap-1 md:gap-3 lg:w-[calc(100%-115px)]\">\n<div class=\"flex flex-grow flex-col gap-3\">\n<div class=\"min-h-[20px] flex flex-col items-start gap-4 whitespace-pre-wrap\">\n<div class=\"markdown prose w-full break-words dark:prose-invert light\">\n<h2>\u52b9\u679c\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306e\u305f\u3081\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u306e\u6700\u9069\u5316<\/h2>\n<h3>\u554f\u984c\u306e\u8aac\u660e\uff1aER\u30e2\u30c7\u30ea\u30f3\u30b0 \u2013 \u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u4f1a\u793e\u30b7\u30b9\u30c6\u30e0<\/h3>\n<p>\u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u4f1a\u793e\u306f\u3001\u4e8b\u696d\u904b\u55b6\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u540c\u793e\u306f\u77ed\u671f\u304a\u3088\u3073\u9577\u671f\u306e\u30ec\u30f3\u30bf\u30eb\u7528\u306b\u9867\u5ba2\u306b\u8cb8\u3057\u51fa\u3055\u308c\u308b\u591a\u6570\u306e\u8eca\u4e21\u3092\u4fdd\u6709\u3057\u3066\u3044\u307e\u3059\u3002\u540c\u793e\u306f\u7570\u306a\u308b\u5834\u6240\u306b\u8907\u6570\u306e\u652f\u5e97\u3092\u6709\u3057\u3066\u304a\u308a\u3001\u5404\u652f\u5e97\u306f\u81ea\u3089\u306e\u8eca\u4e21 fleet \u3092\u4fdd\u6709\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u540c\u793e\u306f\u3001\u30ec\u30f3\u30bf\u30eb\u53ef\u80fd\u306a\u8eca\u4e21\u3001\u8eca\u4e21\u3092\u30ec\u30f3\u30bf\u30eb\u3057\u305f\u9867\u5ba2\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u3001\u304a\u3088\u3073\u5404\u30ec\u30f3\u30bf\u30eb\u306e\u6599\u91d1\u3092\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u5404\u8eca\u4e21\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u304a\u3088\u3073\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6d3b\u52d5\u3082\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><img fetchpriority=\"high\" alt=\"From conceptual to logical to physical ERD\" class=\"alignnone size-full wp-image-1276\" decoding=\"async\" fetchpriority=\"high\" height=\"369\" src=\"https:\/\/guides.visual-paradigm.com\/wp-content\/uploads\/2023\/03\/from-conceptual-to-logical-to-physical-erd.png\" width=\"606\"\/><\/p>\n<p>\u540c\u793e\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u306f\u4ee5\u4e0b\u306e\u8981\u4ef6\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n<ol>\n<li>\u8eca\u4e21\u306f\u7279\u5b9a\u306e\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u306b\u9867\u5ba2\u306b\u8cb8\u3057\u51fa\u3055\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<li>\u9867\u5ba2\u306f\u8907\u6570\u306e\u8eca\u4e21\u3092\u30ec\u30f3\u30bf\u30eb\u3067\u304d\u3001\u307e\u305f\u8eca\u4e21\u306f\u8907\u6570\u306e\u9867\u5ba2\u306b\u30ec\u30f3\u30bf\u30eb\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li>\u5404\u8eca\u4e21\u306e\u30ec\u30f3\u30bf\u30eb\u6599\u91d1\u306f\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u304a\u3088\u3073\u4fdd\u967a\u6599\u3084\u71c3\u6599\u6599\u91d1\u306a\u3069\u306e\u8ffd\u52a0\u6599\u91d1\u306b\u57fa\u3065\u3044\u3066\u8a08\u7b97\u3055\u308c\u308b\u3079\u304d\u3067\u3059\u3002<\/li>\n<li>\u540c\u793e\u306f\u5404\u8eca\u4e21\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u304a\u3088\u3073\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6d3b\u52d5\u3092\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002<\/li>\n<li>\u540c\u793e\u306f\u8eca\u4e21\u306e\u4f7f\u7528\u72b6\u6cc1\u306b\u95a2\u3059\u308b\u30ec\u30dd\u30fc\u30c8\uff08\u30ec\u30f3\u30bf\u30eb\u56de\u6570\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u3001\u767a\u751f\u3057\u305f\u53ce\u76ca\u3092\u542b\u3080\uff09\u3092\u95b2\u89a7\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002<\/li>\n<li>\u540c\u793e\u306f\u8eca\u4e21\u306b\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6d3b\u52d5\u306b\u95a2\u3059\u308b\u30ec\u30dd\u30fc\u30c8\uff08\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u306e\u7a2e\u985e\u3001\u5b9f\u65bd\u65e5\u3001\u8cbb\u7528\u3092\u542b\u3080\uff09\u3092\u95b2\u89a7\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002<\/li>\n<li>\u540c\u793e\u306f\u8eca\u4e21\u3092\u30ec\u30f3\u30bf\u30eb\u3059\u308b\u9867\u5ba2\u3092\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u304a\u308a\u3001\u6c0f\u540d\u3001\u4f4f\u6240\u3001\u96fb\u8a71\u756a\u53f7\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306a\u3069\u306e\u500b\u4eba\u60c5\u5831\u3092\u542b\u3081\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002<\/li>\n<li>\u540c\u793e\u306f\u9867\u5ba2\u306b\u95a2\u3059\u308b\u30ec\u30dd\u30fc\u30c8\uff08\u30ec\u30f3\u30bf\u30eb\u56de\u6570\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u3001\u5404\u9867\u5ba2\u304b\u3089\u306e\u53ce\u76ca\u3092\u542b\u3080\uff09\u3092\u95b2\u89a7\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u3053\u308c\u3089\u306e\u8981\u4ef6\u3092\u6e80\u305f\u3059\u305f\u3081\u306b\u3001\u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u305f\u3081\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\uff08ER\uff09\u56f3\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u56f3\u306b\u306f\u3001Cars\u3001Customers\u3001Rentals\u3001Maintenance\u306a\u3069\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304a\u3088\u3073Rental\u3001Customer Rental\u3001Car Maintenance\u306a\u3069\u306e\u95a2\u4fc2\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"flex justify-between\">\n<h2 class=\"text-gray-400 flex self-end lg:self-center justify-center mt-2 gap-3 md:gap-4 lg:gap-1 lg:absolute lg:top-0 lg:translate-x-full lg:right-0 lg:mt-0 lg:pl-2 visible\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7528ER\u56f3\u306e\u4f5c\u6210\u624b\u9806\u30ac\u30a4\u30c9<\/h2>\n<p>\u4ee5\u4e0b\u306b\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7528\u306eER\u56f3\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n<ol>\n<li><strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u7279\u5b9a\uff1a<\/strong>\u307e\u305a\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u542b\u307e\u308c\u308b\u3055\u307e\u3056\u307e\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u7279\u5b9a\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u3001\u4eba\u3001\u5834\u6240\u3001\u7269\u3001\u307e\u305f\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c9\u30e1\u30a4\u30f3\u306b\u95a2\u9023\u3059\u308b\u6982\u5ff5\u3067\u3042\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001Cars\u3001Customers\u3001Rentals\u3001Maintenance\u306a\u3069\u304c\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u306a\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u5c5e\u6027\u306e\u6c7a\u5b9a\uff1a<\/strong>\u6b21\u306b\u3001\u5404\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u5c5e\u6027\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u5c5e\u6027\u3068\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u8a18\u8ff0\u3059\u308b\u7279\u5fb4\u3084\u6027\u8cea\u3092\u6307\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001Car\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u5c5e\u6027\u306b\u306f\u3001\u30e1\u30fc\u30ab\u30fc\u3001\u30e2\u30c7\u30eb\u3001\u88fd\u9020\u5e74\u3001\u8eca\u4e21\u767b\u9332\u756a\u53f7\u306a\u3069\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u95a2\u4fc2\u306e\u7279\u5b9a\uff1a<\/strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304a\u3088\u3073\u305d\u306e\u5c5e\u6027\u3092\u7279\u5b9a\u3057\u305f\u5f8c\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u95a2\u4fc2\u3068\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u63a5\u7d9a\u3084\u95a2\u9023\u3092\u6307\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001Car\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068Rental\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u95a2\u4fc2\u306f\u3001\u8eca\u4e21\u304c\u7279\u5b9a\u306e\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u306b\u8cb8\u3057\u51fa\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/li>\n<li><strong>\u57fa\u6570\u306e\u6c7a\u5b9a\uff1a<\/strong>\u57fa\u6570\u306f\u3001\u3042\u308b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u3001\u5225\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u95a2\u9023\u4ed8\u3051\u3089\u308c\u308b\u6570\u3092\u8868\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001Car\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068Rental\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u9593\u306e\u57fa\u6570\u306f1\u5bfe\u591a\u3067\u3042\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u3053\u308c\u306f1\u53f0\u306e\u8eca\u4e21\u304c\u591a\u6570\u306e\u9867\u5ba2\u306b\u30ec\u30f3\u30bf\u30eb\u53ef\u80fd\u3067\u3042\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u95a2\u4fc2\u306e\u6b21\u6570\u306e\u6c7a\u5b9a\uff1a<\/strong>\u95a2\u4fc2\u306e\u6b21\u6570\u306f\u3001\u95a2\u4fc2\u306b\u53c2\u52a0\u3059\u308b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u6570\u3092\u6307\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001Car\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068Rental\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u95a2\u4fc2\u306f2\u9805\u95a2\u4fc2\u3067\u3042\u308a\u3001\u3053\u308c\u306f2\u3064\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u307f\u304c\u95a2\u4e0e\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u521d\u671f\u56f3\u306e\u4f5c\u6210\uff1a<\/strong>\u524d\u6bb5\u968e\u3067\u53ce\u96c6\u3057\u305f\u60c5\u5831\u3092\u3082\u3068\u306b\u3001\u521d\u671f\u306eER\u56f3\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u3053\u306e\u56f3\u306b\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3001\u5c5e\u6027\u3001\u95a2\u4fc2\u3001\u57fa\u6570\u3001\u95a2\u4fc2\u306e\u6b21\u6570\u3092\u542b\u3081\u308b\u3079\u304d\u3067\u3059\u3002<\/li>\n<li><strong>\u56f3\u306e\u7cbe\u7dfb\u5316\uff1a<\/strong> ER\u56f3\u3092\u6b63\u78ba\u6027\u3001\u5b8c\u5168\u6027\u3001\u4e00\u8cab\u6027\u306e\u89b3\u70b9\u304b\u3089\u898b\u76f4\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u8abf\u6574\u3084\u4fee\u6b63\u3092\u884c\u3063\u3066\u3001\u56f3\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u8981\u4ef6\u3092\u6b63\u78ba\u306b\u8868\u73fe\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>\u5236\u7d04\u3092\u8ffd\u52a0\u3059\u308b\uff1a<\/strong>\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3068\u4e00\u8cab\u6027\u3092\u78ba\u4fdd\u3059\u308b\u306e\u306b\u5f79\u7acb\u3064\u5236\u7d04\u3092\u56f3\u306b\u8ffd\u52a0\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u5236\u7d04\u3068\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u767b\u9332\u3067\u304d\u308b\u30c7\u30fc\u30bf\u3092\u5236\u9650\u3059\u308b\u30eb\u30fc\u30eb\u3084\u6761\u4ef6\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u3001Car\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u306f\u6709\u52b9\u306a\u8eca\u4e21\u767b\u9332\u756a\u53f7\u304c\u5fc5\u8981\u3067\u3042\u308b\u3068\u3044\u3046\u5236\u7d04\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u56f3\u3092\u6700\u7d42\u5316\u3059\u308b\uff1a<\/strong> ER\u56f3\u306e\u7cbe\u67fb\u304a\u3088\u3073\u5236\u7d04\u306e\u8ffd\u52a0\u304c\u5b8c\u4e86\u3057\u305f\u3089\u3001\u56f3\u3092\u6700\u7d42\u5316\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u6700\u7d42\u7684\u306a\u56f3\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304a\u3088\u3073\u305d\u306e\u8981\u4ef6\u3092\u6b63\u78ba\u306b\u8868\u73fe\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u751f\u6210\u3059\u308b\uff1a<\/strong>\u6700\u7d42\u5316\u3055\u308c\u305fER\u56f3\u3092\u7528\u3044\u3066\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u3092\u751f\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u3001\u5217\u3001\u304a\u3088\u3073\u305d\u308c\u3089\u306e\u9593\u306e\u95a2\u4fc2\u3092\u542b\u3080\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"flex-1 overflow-hidden\">\n<div class=\"react-scroll-to-bottom--css-zuvmc-79elbk h-full dark:bg-gray-800\">\n<div class=\"react-scroll-to-bottom--css-zuvmc-1n7m0yu\">\n<div class=\"flex flex-col items-center text-sm dark:bg-gray-800\">\n<div class=\"group w-full text-gray-800 dark:text-gray-100 border-b border-black\/10 dark:border-gray-900\/50 bg-gray-50 dark:bg-[#444654]\">\n<div class=\"text-base gap-4 md:gap-6 md:max-w-2xl lg:max-w-2xl xl:max-w-3xl p-4 md:py-6 flex lg:px-0 m-auto\">\n<div class=\"relative flex w-[calc(100%-50px)] flex-col gap-1 md:gap-3 lg:w-[calc(100%-115px)]\">\n<div class=\"flex flex-grow flex-col gap-3\">\n<div class=\"min-h-[20px] flex flex-col items-start gap-4 whitespace-pre-wrap\">\n<div class=\"markdown prose w-full break-words dark:prose-invert light\">\n<h2>\u6982\u5ff5\u7684\u3001\u8ad6\u7406\u7684\u3001\u7269\u7406\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b<\/h2>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"flex justify-between\">\u6982\u5ff5\u7684\u3001\u8ad6\u7406\u7684\u3001\u7269\u7406\u7684\u306f\u3001\u7d44\u7e54\u3084\u30b7\u30b9\u30c6\u30e0\u5185\u306e\u30c7\u30fc\u30bf\u304a\u3088\u3073\u95a2\u4fc2\u3092\u8868\u73fe\u3059\u308b\u3088\u3046\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u8a2d\u8a08\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u3042\u308b\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u306e3\u3064\u306e\u4e3b\u8981\u306a\u6bb5\u968e\u3067\u3059\u3002<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"absolute bottom-0 left-0 w-full border-t md:border-t-0 dark:border-white\/20 md:border-transparent md:dark:border-transparent md:bg-vert-light-gradient bg-white dark:bg-gray-800 md:!bg-transparent dark:md:bg-vert-dark-gradient pt-2\">\n<form class=\"stretch mx-2 flex flex-row gap-3 last:mb-2 md:mx-4 md:last:mb-6 lg:mx-auto lg:max-w-3xl\">\n<div class=\"relative flex h-full flex-1 md:flex-col\">\n<div class=\"flex ml-1 md:w-full md:m-auto md:mb-2 gap-0 md:gap-2 justify-center\">\n<p>\u5404\u6bb5\u968e\u304c\u3069\u306e\u3088\u3046\u306a\u5185\u5bb9\u3092\u542b\u3080\u304b\u306e\u6982\u8981\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\uff1a<\/p>\n<ol>\n<li><strong>\u6982\u5ff5\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\uff1a<\/strong>\u3053\u306e\u6bb5\u968e\u3067\u306f\u3001\u30c7\u30fc\u30bf\u306e\u9ad8\u30ec\u30d9\u30eb\u306a\u8996\u70b9\u304a\u3088\u3073\u305d\u308c\u3089\u306e\u9593\u306e\u95a2\u4fc2\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306b\u7126\u70b9\u3092\u5f53\u3066\u307e\u3059\u3002\u7279\u5b9a\u306e\u6280\u8853\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\uff08DBMS\uff09\u306b\u4f9d\u5b58\u3057\u307e\u305b\u3093\u3002\u4e3b\u306a\u76ee\u7684\u306f\u3001\u4e3b\u8981\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3001\u305d\u308c\u3089\u306e\u95a2\u4fc2\u3001\u304a\u3088\u3073\u5c5e\u6027\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u306e\u6bb5\u968e\u306e\u6210\u679c\u7269\u306f\u3001\u8ad6\u7406\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u958b\u767a\u3092\u30ac\u30a4\u30c9\u3059\u308b\u6982\u5ff5\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3067\u3059\u3002<\/li>\n<li><strong>\u8ad6\u7406\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\uff1a<\/strong>\u3053\u306e\u6bb5\u968e\u3067\u306f\u3001\u30c7\u30fc\u30bf\u69cb\u9020\u304a\u3088\u3073\u95a2\u4fc2\u3092\u8a73\u7d30\u306b\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u306b\u7126\u70b9\u3092\u5f53\u3066\u307e\u3059\u3002\u6982\u5ff5\u6bb5\u968e\u3067\u7279\u5b9a\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u6982\u5ff5\u306b\u5bfe\u5fdc\u3059\u308b\u8ad6\u7406\u30b9\u30ad\u30fc\u30de\u3092\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u3084\u985e\u4f3c\u306e\u30c4\u30fc\u30eb\u3092\u7528\u3044\u3066\u542b\u307f\u307e\u3059\u3002\u8ad6\u7406\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306f\u3001\u30d3\u30b8\u30cd\u30b9\u8981\u4ef6\u3092\u30c7\u30fc\u30bf\u69cb\u9020\u304a\u3088\u3073\u95a2\u4fc2\u306e\u89b3\u70b9\u304b\u3089\u8868\u73fe\u3057\u3001\u7269\u7406\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u3068\u306f\u72ec\u7acb\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u6bb5\u968e\u306e\u6210\u679c\u7269\u306f\u3001\u7269\u7406\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u958b\u767a\u3092\u30ac\u30a4\u30c9\u3059\u308b\u8ad6\u7406\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3067\u3059\u3002<\/li>\n<li><strong>\u7269\u7406\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\uff1a<\/strong>\u3053\u306e\u6bb5\u968e\u3067\u306f\u3001\u8ad6\u7406\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3092\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u306b\u7ffb\u8a33\u3059\u308b\u3053\u3068\u306b\u7126\u70b9\u3092\u5f53\u3066\u307e\u3059\u3002\u5bfe\u8c61DBMS\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u8981\u4ef6\u3001\u6280\u8853\u7684\u5236\u7d04\u3092\u8003\u616e\u3057\u307e\u3059\u3002\u7269\u7406\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u3001\u5217\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306a\u3069\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3001\u304a\u3088\u3073\u305d\u308c\u3089\u306e\u30c7\u30fc\u30bf\u578b\u3001\u30b5\u30a4\u30ba\u3001\u5236\u7d04\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002\u3053\u306e\u6bb5\u968e\u306e\u6210\u679c\u7269\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u4f5c\u6210\u304a\u3088\u3073\u5b9f\u88c5\u306b\u4f7f\u7528\u3055\u308c\u308b\u7269\u7406\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3067\u3059\u3002<\/li>\n<\/ol>\n<p>\u8981\u3059\u308b\u306b\u3001\u6982\u5ff5\u6bb5\u968e\u3067\u306f\u30c7\u30fc\u30bf\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u305d\u306e\u95a2\u4fc2\u3092\u9ad8\u30ec\u30d9\u30eb\u3067\u5b9a\u7fa9\u3057\u3001\u8ad6\u7406\u6bb5\u968e\u3067\u306f\u8a73\u7d30\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3068\u95a2\u4fc2\u3092\u5b9a\u7fa9\u3057\u3001\u7269\u7406\u6bb5\u968e\u3067\u306f\u8ad6\u7406\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3092\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3084\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u8003\u616e\u3092\u542b\u3080\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6280\u8853\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n<\/div>\n<\/form>\n<\/div>\n<h2>\u554f\u984c\u8a18\u8ff0\u304b\u3089\u6982\u5ff5\u7684ER\u56f3\u3092\u4f5c\u6210\u3059\u308b<\/h2>\n<p>ER\u56f3\u306b\u306f4\u3064\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u542b\u307e\u308c\u307e\u3059\uff1aCar\u3001Customer\u3001Rental\u3001Maintenance\u3002\u5404\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u306f\u3001Car\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e car_id\u3001model\u3001make\u3001year\u3001daily_rate\u3001fuel_type\u3001is_available\u3001Customer\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e first_name\u3001last_name\u3001email\u3001phone_number\u3001address\u3001Rental\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e start_date\u3001end_date\u3001rental_rate\u3001insurance_charge\u3001fuel_charge\u3001Maintenance\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e type\u3001description\u3001cost\u3001maintenance_date \u306a\u3069\u306e\u5c5e\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>ER\u56f3\u306f\u3001Car\u3068Rental\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306eRental\u95a2\u4fc2\u3001Rental\u3068Customer\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306eCustomer Rental\u95a2\u4fc2\u3001Car\u3068Maintenance\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306eCar Maintenance\u95a2\u4fc2\u306a\u3069\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3082\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<div class=\"group w-full text-gray-800 dark:text-gray-100 border-b border-black\/10 dark:border-gray-900\/50 bg-gray-50 dark:bg-[#444654]\">\n<div class=\"text-base gap-4 md:gap-6 md:max-w-2xl lg:max-w-2xl xl:max-w-3xl p-4 md:py-6 flex lg:px-0 m-auto\">\n<div class=\"relative flex w-[calc(100%-50px)] flex-col gap-1 md:gap-3 lg:w-[calc(100%-115px)]\">\n<p><img alt=\"Car rental conceptual ERD\" class=\"alignnone size-full wp-image-1279\" decoding=\"async\" height=\"546\" src=\"https:\/\/guides.visual-paradigm.com\/wp-content\/uploads\/2023\/03\/car-rental-conceptual-erd.png\" width=\"358\"\/><\/p>\n<h2 id=\"adCJKkW\">\u6982\u5ff5\u7684ER\u56f3\u3092\u8ad6\u7406\u7684ER\u56f3\u306b\u7cbe\u67fb\u3059\u308b<\/h2>\n<p>\u8ad6\u7406\u7684ER\u56f3\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u3001\u5217\u3001\u30ad\u30fc\u3001\u95a2\u4fc2\u6027\u306b\u91cd\u70b9\u3092\u7f6e\u3044\u305f\u3088\u308a\u5f62\u5f0f\u7684\u3067\u8a73\u7d30\u306a\u8868\u8a18\u3092\u542b\u307f\u307e\u3059\u3002\u7279\u306b\u3001\u5217\u306e\u30c7\u30fc\u30bf\u578b\u304c\u660e\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u95a2\u4fc2\u6027\u306e\u6027\u8cea\u3092\u793a\u3059\u305f\u3081\u306b\u3001\u300crents\uff08\u501f\u308a\u308b\uff09\u300d\u3001\u300crented by\uff08\u501f\u308a\u305f\uff09\u300d\u3001\u300crequires\uff08\u5fc5\u8981\u3068\u3059\u308b\uff09\u300d\u306a\u3069\u306e\u30e9\u30d9\u30eb\u304c\u95a2\u4fc2\u306b\u8ffd\u52a0\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><img alt=\"Car rental logical ERD\" class=\"alignnone size-full wp-image-1277\" decoding=\"async\" height=\"549\" src=\"https:\/\/guides.visual-paradigm.com\/wp-content\/uploads\/2023\/03\/car-rental-logical-erd.png\" width=\"496\"\/><\/p>\n<h2 id=\"adCJKkW\">\u8ad6\u7406\u7684ER\u56f3\u3092\u7269\u7406\u7684ER\u56f3\u306b\u7cbe\u67fb\u3059\u308b<\/h2>\n<p>\u7269\u7406\u7684ER\u56f3\u306f\u3001\u7279\u5b9a\u306eDBMS\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u5b9f\u88c5\u3067\u304d\u308b\u3060\u3051\u306e\u8a73\u7d30\u3092\u63d0\u4f9b\u3059\u308b\u300e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u56f3\u300f\u3067\u3059\u3002\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304a\u3088\u3073\u5217\u306e\u540d\u524d\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u4fee\u6b63\u3055\u308c\u307e\u3059\uff1a<\/p>\n<ul>\n<li>DBMS\u56fa\u6709\u306e\u69cb\u6587\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3002<\/li>\n<li>\u4e88\u7d04\u8a9e\u3067\u306a\u3044\u5358\u8a9e\u306e\u4f7f\u7528\u3092\u78ba\u4fdd\u3059\u308b\uff08\u4f8b\uff1aorder \u2192 purchase_order\u3001desc \u2192 description\uff09<\/li>\n<li>\u7d44\u7e54\u56fa\u6709\u306e\u547d\u540d\u898f\u5247\u306b\u9069\u5408\u3055\u305b\u308b<\/li>\n<\/ul>\n<p>Maintenance\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u5217\u300edesc\u300f\u306f\u300edescription\u300f\u306b\u540d\u524d\u304c\u5909\u66f4\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" alt=\"Car rental physical ERD\" class=\"alignnone size-full wp-image-1278\" decoding=\"async\" height=\"553\" loading=\"lazy\" src=\"https:\/\/guides.visual-paradigm.com\/wp-content\/uploads\/2023\/03\/car-rental-physical-erd.png\" width=\"485\"\/><\/p>\n<h2>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u751f\u6210\uff1aER\u56f3\u3092\u7269\u7406\u30b9\u30ad\u30fc\u30de\u306b\u5909\u63db\u3059\u308b<\/h2>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u306f\u3001\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u30c7\u30fc\u30bf\u306e\u69cb\u6210\u3092\u5b9a\u7fa9\u3059\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u306e\u8996\u899a\u7684\u8868\u73fe\u3067\u3059\u3002\u3053\u306e\u30b9\u30ad\u30fc\u30de\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u5185\u306e\u7570\u306a\u308b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u306b\u57fa\u3065\u3044\u3066\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u5834\u5408\u3001ERD\u306f\u307e\u305a\u3001\u8eca\u3001\u9867\u5ba2\u3001\u30ec\u30f3\u30bf\u30eb\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u306a\u3069\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u305d\u308c\u3089\u306e\u5c5e\u6027\u9593\u306e\u95a2\u4fc2\u3092\u5b9a\u7fa9\u3059\u308b\u8ad6\u7406ERD\u306b\u7cbe\u7dfb\u5316\u3055\u308c\u307e\u3057\u305f\u3002\u8ad6\u7406ERD\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u6027\u3068\u57fa\u6570\u3092\u78ba\u7acb\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3057\u305f\u3002<\/p>\n<p>\u8ad6\u7406ERD\u3092\u7cbe\u7dfb\u5316\u3057\u305f\u5f8c\u3001\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u3001\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u578b\u3001\u4e3b\u30ad\u30fc\u304a\u3088\u3073\u5916\u90e8\u30ad\u30fc\u3001\u5236\u7d04\u3092\u542b\u3080\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u3092\u5b9a\u7fa9\u3059\u308b\u7269\u7406ERD\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\u7269\u7406ERD\u306f\u8ad6\u7406ERD\u3092\u53cd\u6620\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u30c7\u30fc\u30bf\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u3069\u306e\u3088\u3046\u306b\u683c\u7d0d\u3055\u308c\u308b\u304b\u306b\u3064\u3044\u3066\u3088\u308a\u8a73\u7d30\u306a\u60c5\u5831\u3092\u542b\u3093\u3067\u3044\u307e\u3059\u3002<\/p>\n<p>\u7269\u7406ERD\u306b\u57fa\u3065\u3044\u3066\u3001\u9069\u5207\u306a\u30c6\u30fc\u30d6\u30eb\u3001\u5217\u3001\u304a\u3088\u3073\u305d\u308c\u3089\u306e\u9593\u306e\u95a2\u4fc2\u3092\u542b\u3080\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306eSQL\u30b3\u30fc\u30c9\u304c\u8a18\u8ff0\u3055\u308c\u307e\u3057\u305f\u3002\u30b9\u30ad\u30fc\u30de\u5185\u306e\u5404\u30c6\u30fc\u30d6\u30eb\u306f\u30b7\u30b9\u30c6\u30e0\u5185\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u8868\u3057\u3001\u5217\u306f\u305d\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u5c5e\u6027\u3092\u8868\u3057\u307e\u3059\u3002\u4e3b\u30ad\u30fc\u306f\u30c6\u30fc\u30d6\u30eb\u5185\u306e\u5404\u30ec\u30b3\u30fc\u30c9\u3092\u4e00\u610f\u306b\u8b58\u5225\u3059\u308b\u305f\u3081\u306b\u5b9a\u7fa9\u3055\u308c\u3001\u5916\u90e8\u30ad\u30fc\u306f\u30c6\u30fc\u30d6\u30eb\u9593\u306e\u95a2\u4fc2\u3092\u78ba\u7acb\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<blockquote>\n<p>CREATE TABLE Car (<br \/>\ncar_id INT PRIMARY KEY,<br \/>\nmodel VARCHAR(255),<br \/>\nmake VARCHAR(255),<br \/>\nyear INT,<br \/>\ndaily_rate DECIMAL(10, 2),<br \/>\nfuel_type VARCHAR(255),<br \/>\nis_available BOOLEAN<br \/>\n);<\/p>\n<p>CREATE TABLE Customer (<br \/>\ncustomer_id INT PRIMARY KEY,<br \/>\nfirst_name VARCHAR(255),<br \/>\nlast_name VARCHAR(255),<br \/>\nemail VARCHAR(255),<br \/>\nphone_number VARCHAR(255),<br \/>\naddress VARCHAR(255)<br \/>\n);<\/p>\n<p>CREATE TABLE Rental (<br \/>\nrental_id INT PRIMARY KEY,<br \/>\nstart_date DATE,<br \/>\nend_date DATE,<br \/>\nrental_rate DECIMAL(10, 2),<br \/>\ninsurance_charge DECIMAL(10, 2),<br \/>\nfuel_charge DECIMAL(10, 2),<br \/>\ncar_id INT,<br \/>\ncustomer_id INT,<br \/>\nFOREIGN KEY (car_id) REFERENCES Car(car_id),<br \/>\n\u5916\u90e8\u30ad\u30fc (customer_id) \u53c2\u7167 Customer(customer_id)<br \/>\n);<\/p>\n<p>CREATE TABLE Maintenance (<br \/>\nmaintenance_id INT PRIMARY KEY,<br \/>\ntype VARCHAR(255),<br \/>\ndescription TEXT,<br \/>\ncost DECIMAL(10, 2),<br \/>\nmaintenance_date DATE,<br \/>\ncar_id INT,<br \/>\n\u5916\u90e8\u30ad\u30fc (car_id) \u53c2\u7167 Car(car_id)<br \/>\n);<\/p>\n<\/blockquote>\n<h2>\u8981\u7d04<\/h2>\n<\/div>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u52b9\u679c\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u3092\u751f\u6210\u3059\u308b\u305f\u3081\u306b\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u3092\u7cbe\u7dfb\u5316\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u308b\u3002ERD\u306f\u6982\u5ff5\u30ec\u30d9\u30eb\u304b\u3089\u8ad6\u7406\u30ec\u30d9\u30eb\u3078\u3001\u305d\u3057\u3066\u7269\u7406\u30ec\u30d9\u30eb\u3078\u3068\u6bb5\u968e\u7684\u306b\u7cbe\u7dfb\u5316\u3055\u308c\u308b\u3002\u8ad6\u7406ERD\u306f\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u6027\u3068\u57fa\u6570\u3092\u78ba\u7acb\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001\u7269\u7406ERD\u306f\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u578b\u3001\u4e3b\u30ad\u30fc\u304a\u3088\u3073\u5916\u90e8\u30ad\u30fc\u3001\u5236\u7d04\u3092\u542b\u3080\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u3092\u5b9a\u7fa9\u3059\u308b\u3002<\/p>\n<p>\u305d\u306e\u5f8c\u3001\u7269\u7406ERD\u306b\u57fa\u3065\u3044\u3066SQL\u30b3\u30fc\u30c9\u304c\u8a18\u8ff0\u3055\u308c\u3001\u9069\u5207\u306a\u30c6\u30fc\u30d6\u30eb\u3001\u5217\u3001\u95a2\u4fc2\u6027\u3092\u5099\u3048\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u304c\u4f5c\u6210\u3055\u308c\u308b\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u52b9\u679c\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306e\u305f\u3081\u306bERD\u3092\u7cbe\u7dfb\u5316\u3059\u308b\u3053\u3068\u306e\u91cd\u8981\u6027\u3092\u5f37\u8abf\u3057\u3001ERD\u304b\u3089\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u3092\u751f\u6210\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u306b\u95a2\u3059\u308b\u6d1e\u5bdf\u3092\u63d0\u4f9b\u3057\u3066\u3044\u308b\u3002<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u52b9\u679c\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306e\u305f\u3081\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u306e\u6700\u9069\u5316 \u554f\u984c\u306e\u8aac\u660e\uff1aER\u30e2\u30c7\u30ea\u30f3\u30b0 \u2013 \u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u4f1a\u793e\u30b7\u30b9\u30c6\u30e0 \u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u4f1a\u793e\u306f\u3001\u4e8b\u696d\u904b\u55b6\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u540c\u793e\u306f\u77ed\u671f\u304a\u3088\u3073\u9577\u671f\u306e\u30ec\u30f3\u30bf\u30eb\u7528\u306b\u9867\u5ba2\u306b\u8cb8\u3057\u51fa\u3055\u308c\u308b\u591a\u6570\u306e\u8eca\u4e21\u3092\u4fdd\u6709\u3057\u3066\u3044\u307e\u3059\u3002\u540c\u793e\u306f\u7570\u306a\u308b\u5834\u6240\u306b\u8907\u6570\u306e\u652f\u5e97\u3092\u6709\u3057\u3066\u304a\u308a\u3001\u5404\u652f\u5e97\u306f\u81ea\u3089\u306e\u8eca\u4e21 fleet \u3092\u4fdd\u6709\u3057\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u3001\u30ec\u30f3\u30bf\u30eb\u53ef\u80fd\u306a\u8eca\u4e21\u3001\u8eca\u4e21\u3092\u30ec\u30f3\u30bf\u30eb\u3057\u305f\u9867\u5ba2\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u3001\u304a\u3088\u3073\u5404\u30ec\u30f3\u30bf\u30eb\u306e\u6599\u91d1\u3092\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u5404\u8eca\u4e21\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u304a\u3088\u3073\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6d3b\u52d5\u3082\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u306f\u4ee5\u4e0b\u306e\u8981\u4ef6\u304c\u3042\u308a\u307e\u3059\uff1a \u8eca\u4e21\u306f\u7279\u5b9a\u306e\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u306b\u9867\u5ba2\u306b\u8cb8\u3057\u51fa\u3055\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u9867\u5ba2\u306f\u8907\u6570\u306e\u8eca\u4e21\u3092\u30ec\u30f3\u30bf\u30eb\u3067\u304d\u3001\u307e\u305f\u8eca\u4e21\u306f\u8907\u6570\u306e\u9867\u5ba2\u306b\u30ec\u30f3\u30bf\u30eb\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u5404\u8eca\u4e21\u306e\u30ec\u30f3\u30bf\u30eb\u6599\u91d1\u306f\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u304a\u3088\u3073\u4fdd\u967a\u6599\u3084\u71c3\u6599\u6599\u91d1\u306a\u3069\u306e\u8ffd\u52a0\u6599\u91d1\u306b\u57fa\u3065\u3044\u3066\u8a08\u7b97\u3055\u308c\u308b\u3079\u304d\u3067\u3059\u3002 \u540c\u793e\u306f\u5404\u8eca\u4e21\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u304a\u3088\u3073\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6d3b\u52d5\u3092\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u8eca\u4e21\u306e\u4f7f\u7528\u72b6\u6cc1\u306b\u95a2\u3059\u308b\u30ec\u30dd\u30fc\u30c8\uff08\u30ec\u30f3\u30bf\u30eb\u56de\u6570\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u3001\u767a\u751f\u3057\u305f\u53ce\u76ca\u3092\u542b\u3080\uff09\u3092\u95b2\u89a7\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u8eca\u4e21\u306b\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6d3b\u52d5\u306b\u95a2\u3059\u308b\u30ec\u30dd\u30fc\u30c8\uff08\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u306e\u7a2e\u985e\u3001\u5b9f\u65bd\u65e5\u3001\u8cbb\u7528\u3092\u542b\u3080\uff09\u3092\u95b2\u89a7\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u8eca\u4e21\u3092\u30ec\u30f3\u30bf\u30eb\u3059\u308b\u9867\u5ba2\u3092\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u304a\u308a\u3001\u6c0f\u540d\u3001\u4f4f\u6240\u3001\u96fb\u8a71\u756a\u53f7\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306a\u3069\u306e\u500b\u4eba\u60c5\u5831\u3092\u542b\u3081\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u9867\u5ba2\u306b\u95a2\u3059\u308b\u30ec\u30dd\u30fc\u30c8\uff08\u30ec\u30f3\u30bf\u30eb\u56de\u6570\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u3001\u5404\u9867\u5ba2\u304b\u3089\u306e\u53ce\u76ca\u3092\u542b\u3080\uff09\u3092\u95b2\u89a7\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u3053\u308c\u3089\u306e\u8981\u4ef6\u3092\u6e80\u305f\u3059\u305f\u3081\u306b\u3001\u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u305f\u3081\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\uff08ER\uff09\u56f3\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u56f3\u306b\u306f\u3001Cars\u3001Customers\u3001Rentals\u3001Maintenance\u306a\u3069\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304a\u3088\u3073Rental\u3001Customer Rental\u3001Car Maintenance\u306a\u3069\u306e\u95a2\u4fc2\u304c\u542b\u307e\u308c\u307e\u3059\u3002 \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7528ER\u56f3\u306e\u4f5c\u6210\u624b\u9806\u30ac\u30a4\u30c9 \u4ee5\u4e0b\u306b\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7528\u306eER\u56f3\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\u3092\u793a\u3057\u307e\u3059\uff1a \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u7279\u5b9a\uff1a\u307e\u305a\u3001\u30c7<a href=\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/\" rel=\"bookmark\"><span class=\"screen-reader-text\">ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":6812,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","_eb_attr":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[17],"tags":[],"class_list":["post-6811","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-data-modeling-database"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09 - Visual Paradigm Guides Japanese<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09 - Visual Paradigm Guides Japanese\" \/>\n<meta property=\"og:description\" content=\"\u52b9\u679c\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306e\u305f\u3081\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u306e\u6700\u9069\u5316 \u554f\u984c\u306e\u8aac\u660e\uff1aER\u30e2\u30c7\u30ea\u30f3\u30b0 \u2013 \u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u4f1a\u793e\u30b7\u30b9\u30c6\u30e0 \u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u4f1a\u793e\u306f\u3001\u4e8b\u696d\u904b\u55b6\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u540c\u793e\u306f\u77ed\u671f\u304a\u3088\u3073\u9577\u671f\u306e\u30ec\u30f3\u30bf\u30eb\u7528\u306b\u9867\u5ba2\u306b\u8cb8\u3057\u51fa\u3055\u308c\u308b\u591a\u6570\u306e\u8eca\u4e21\u3092\u4fdd\u6709\u3057\u3066\u3044\u307e\u3059\u3002\u540c\u793e\u306f\u7570\u306a\u308b\u5834\u6240\u306b\u8907\u6570\u306e\u652f\u5e97\u3092\u6709\u3057\u3066\u304a\u308a\u3001\u5404\u652f\u5e97\u306f\u81ea\u3089\u306e\u8eca\u4e21 fleet \u3092\u4fdd\u6709\u3057\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u3001\u30ec\u30f3\u30bf\u30eb\u53ef\u80fd\u306a\u8eca\u4e21\u3001\u8eca\u4e21\u3092\u30ec\u30f3\u30bf\u30eb\u3057\u305f\u9867\u5ba2\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u3001\u304a\u3088\u3073\u5404\u30ec\u30f3\u30bf\u30eb\u306e\u6599\u91d1\u3092\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u5404\u8eca\u4e21\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u304a\u3088\u3073\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6d3b\u52d5\u3082\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u306f\u4ee5\u4e0b\u306e\u8981\u4ef6\u304c\u3042\u308a\u307e\u3059\uff1a \u8eca\u4e21\u306f\u7279\u5b9a\u306e\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u306b\u9867\u5ba2\u306b\u8cb8\u3057\u51fa\u3055\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u9867\u5ba2\u306f\u8907\u6570\u306e\u8eca\u4e21\u3092\u30ec\u30f3\u30bf\u30eb\u3067\u304d\u3001\u307e\u305f\u8eca\u4e21\u306f\u8907\u6570\u306e\u9867\u5ba2\u306b\u30ec\u30f3\u30bf\u30eb\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u5404\u8eca\u4e21\u306e\u30ec\u30f3\u30bf\u30eb\u6599\u91d1\u306f\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u304a\u3088\u3073\u4fdd\u967a\u6599\u3084\u71c3\u6599\u6599\u91d1\u306a\u3069\u306e\u8ffd\u52a0\u6599\u91d1\u306b\u57fa\u3065\u3044\u3066\u8a08\u7b97\u3055\u308c\u308b\u3079\u304d\u3067\u3059\u3002 \u540c\u793e\u306f\u5404\u8eca\u4e21\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u304a\u3088\u3073\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6d3b\u52d5\u3092\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u8eca\u4e21\u306e\u4f7f\u7528\u72b6\u6cc1\u306b\u95a2\u3059\u308b\u30ec\u30dd\u30fc\u30c8\uff08\u30ec\u30f3\u30bf\u30eb\u56de\u6570\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u3001\u767a\u751f\u3057\u305f\u53ce\u76ca\u3092\u542b\u3080\uff09\u3092\u95b2\u89a7\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u8eca\u4e21\u306b\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6d3b\u52d5\u306b\u95a2\u3059\u308b\u30ec\u30dd\u30fc\u30c8\uff08\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u306e\u7a2e\u985e\u3001\u5b9f\u65bd\u65e5\u3001\u8cbb\u7528\u3092\u542b\u3080\uff09\u3092\u95b2\u89a7\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u8eca\u4e21\u3092\u30ec\u30f3\u30bf\u30eb\u3059\u308b\u9867\u5ba2\u3092\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u304a\u308a\u3001\u6c0f\u540d\u3001\u4f4f\u6240\u3001\u96fb\u8a71\u756a\u53f7\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306a\u3069\u306e\u500b\u4eba\u60c5\u5831\u3092\u542b\u3081\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u9867\u5ba2\u306b\u95a2\u3059\u308b\u30ec\u30dd\u30fc\u30c8\uff08\u30ec\u30f3\u30bf\u30eb\u56de\u6570\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u3001\u5404\u9867\u5ba2\u304b\u3089\u306e\u53ce\u76ca\u3092\u542b\u3080\uff09\u3092\u95b2\u89a7\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u3053\u308c\u3089\u306e\u8981\u4ef6\u3092\u6e80\u305f\u3059\u305f\u3081\u306b\u3001\u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u305f\u3081\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\uff08ER\uff09\u56f3\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u56f3\u306b\u306f\u3001Cars\u3001Customers\u3001Rentals\u3001Maintenance\u306a\u3069\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304a\u3088\u3073Rental\u3001Customer Rental\u3001Car Maintenance\u306a\u3069\u306e\u95a2\u4fc2\u304c\u542b\u307e\u308c\u307e\u3059\u3002 \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7528ER\u56f3\u306e\u4f5c\u6210\u624b\u9806\u30ac\u30a4\u30c9 \u4ee5\u4e0b\u306b\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7528\u306eER\u56f3\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\u3092\u793a\u3057\u307e\u3059\uff1a \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u7279\u5b9a\uff1a\u307e\u305a\u3001\u30c7ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09\" \/>\n<meta property=\"og:url\" content=\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/\" \/>\n<meta property=\"og:site_name\" content=\"Visual Paradigm Guides Japanese\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-05T17:26:03+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/guides.visual-paradigm.com\/ja\/wp-content\/uploads\/sites\/4\/2026\/02\/from-conceptual-to-logical-to-physical-erd-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"606\" \/>\n\t<meta property=\"og:image:height\" content=\"369\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"vpadmin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"9\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/\"},\"headline\":\"ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09\",\"datePublished\":\"2026-02-05T17:26:03+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/\"},\"wordCount\":241,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/guides.visual-paradigm.com\/ja\/wp-content\/uploads\/sites\/4\/2026\/02\/from-conceptual-to-logical-to-physical-erd-1.png\",\"articleSection\":[\"Data Modeling \/ Database\"],\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/\",\"url\":\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/\",\"name\":\"ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09 - Visual Paradigm Guides Japanese\",\"isPartOf\":{\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/guides.visual-paradigm.com\/ja\/wp-content\/uploads\/sites\/4\/2026\/02\/from-conceptual-to-logical-to-physical-erd-1.png\",\"datePublished\":\"2026-02-05T17:26:03+00:00\",\"author\":{\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/#\/schema\/person\/292e97a06c90d6d605ddfd451bfdfe6f\"},\"breadcrumb\":{\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#primaryimage\",\"url\":\"https:\/\/guides.visual-paradigm.com\/ja\/wp-content\/uploads\/sites\/4\/2026\/02\/from-conceptual-to-logical-to-physical-erd-1.png\",\"contentUrl\":\"https:\/\/guides.visual-paradigm.com\/ja\/wp-content\/uploads\/sites\/4\/2026\/02\/from-conceptual-to-logical-to-physical-erd-1.png\",\"width\":606,\"height\":369},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/guides.visual-paradigm.com\/ja\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Data Modeling \/ Database\",\"item\":\"https:\/\/guides.visual-paradigm.com\/ja\/category\/data-modeling-database\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/guides.visual-paradigm.com\/ja\/#website\",\"url\":\"https:\/\/guides.visual-paradigm.com\/ja\/\",\"name\":\"Visual Paradigm Guides Japanese\",\"description\":\"Smart guides for an AI-driven world\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/guides.visual-paradigm.com\/ja\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ja\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09 - Visual Paradigm Guides Japanese","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/","og_locale":"ja_JP","og_type":"article","og_title":"ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09 - Visual Paradigm Guides Japanese","og_description":"\u52b9\u679c\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306e\u305f\u3081\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u306e\u6700\u9069\u5316 \u554f\u984c\u306e\u8aac\u660e\uff1aER\u30e2\u30c7\u30ea\u30f3\u30b0 \u2013 \u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u4f1a\u793e\u30b7\u30b9\u30c6\u30e0 \u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u4f1a\u793e\u306f\u3001\u4e8b\u696d\u904b\u55b6\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u540c\u793e\u306f\u77ed\u671f\u304a\u3088\u3073\u9577\u671f\u306e\u30ec\u30f3\u30bf\u30eb\u7528\u306b\u9867\u5ba2\u306b\u8cb8\u3057\u51fa\u3055\u308c\u308b\u591a\u6570\u306e\u8eca\u4e21\u3092\u4fdd\u6709\u3057\u3066\u3044\u307e\u3059\u3002\u540c\u793e\u306f\u7570\u306a\u308b\u5834\u6240\u306b\u8907\u6570\u306e\u652f\u5e97\u3092\u6709\u3057\u3066\u304a\u308a\u3001\u5404\u652f\u5e97\u306f\u81ea\u3089\u306e\u8eca\u4e21 fleet \u3092\u4fdd\u6709\u3057\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u3001\u30ec\u30f3\u30bf\u30eb\u53ef\u80fd\u306a\u8eca\u4e21\u3001\u8eca\u4e21\u3092\u30ec\u30f3\u30bf\u30eb\u3057\u305f\u9867\u5ba2\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u3001\u304a\u3088\u3073\u5404\u30ec\u30f3\u30bf\u30eb\u306e\u6599\u91d1\u3092\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u5404\u8eca\u4e21\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u304a\u3088\u3073\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6d3b\u52d5\u3082\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u306f\u4ee5\u4e0b\u306e\u8981\u4ef6\u304c\u3042\u308a\u307e\u3059\uff1a \u8eca\u4e21\u306f\u7279\u5b9a\u306e\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u306b\u9867\u5ba2\u306b\u8cb8\u3057\u51fa\u3055\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u9867\u5ba2\u306f\u8907\u6570\u306e\u8eca\u4e21\u3092\u30ec\u30f3\u30bf\u30eb\u3067\u304d\u3001\u307e\u305f\u8eca\u4e21\u306f\u8907\u6570\u306e\u9867\u5ba2\u306b\u30ec\u30f3\u30bf\u30eb\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u5404\u8eca\u4e21\u306e\u30ec\u30f3\u30bf\u30eb\u6599\u91d1\u306f\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u304a\u3088\u3073\u4fdd\u967a\u6599\u3084\u71c3\u6599\u6599\u91d1\u306a\u3069\u306e\u8ffd\u52a0\u6599\u91d1\u306b\u57fa\u3065\u3044\u3066\u8a08\u7b97\u3055\u308c\u308b\u3079\u304d\u3067\u3059\u3002 \u540c\u793e\u306f\u5404\u8eca\u4e21\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u304a\u3088\u3073\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6d3b\u52d5\u3092\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u8eca\u4e21\u306e\u4f7f\u7528\u72b6\u6cc1\u306b\u95a2\u3059\u308b\u30ec\u30dd\u30fc\u30c8\uff08\u30ec\u30f3\u30bf\u30eb\u56de\u6570\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u3001\u767a\u751f\u3057\u305f\u53ce\u76ca\u3092\u542b\u3080\uff09\u3092\u95b2\u89a7\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u8eca\u4e21\u306b\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6d3b\u52d5\u306b\u95a2\u3059\u308b\u30ec\u30dd\u30fc\u30c8\uff08\u5b9f\u65bd\u3055\u308c\u305f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u306e\u7a2e\u985e\u3001\u5b9f\u65bd\u65e5\u3001\u8cbb\u7528\u3092\u542b\u3080\uff09\u3092\u95b2\u89a7\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u8eca\u4e21\u3092\u30ec\u30f3\u30bf\u30eb\u3059\u308b\u9867\u5ba2\u3092\u7ba1\u7406\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u304a\u308a\u3001\u6c0f\u540d\u3001\u4f4f\u6240\u3001\u96fb\u8a71\u756a\u53f7\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306a\u3069\u306e\u500b\u4eba\u60c5\u5831\u3092\u542b\u3081\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u540c\u793e\u306f\u9867\u5ba2\u306b\u95a2\u3059\u308b\u30ec\u30dd\u30fc\u30c8\uff08\u30ec\u30f3\u30bf\u30eb\u56de\u6570\u3001\u30ec\u30f3\u30bf\u30eb\u671f\u9593\u3001\u5404\u9867\u5ba2\u304b\u3089\u306e\u53ce\u76ca\u3092\u542b\u3080\uff09\u3092\u95b2\u89a7\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u3053\u308c\u3089\u306e\u8981\u4ef6\u3092\u6e80\u305f\u3059\u305f\u3081\u306b\u3001\u30ab\u30fc\u30ec\u30f3\u30bf\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u305f\u3081\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\uff08ER\uff09\u56f3\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u56f3\u306b\u306f\u3001Cars\u3001Customers\u3001Rentals\u3001Maintenance\u306a\u3069\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304a\u3088\u3073Rental\u3001Customer Rental\u3001Car Maintenance\u306a\u3069\u306e\u95a2\u4fc2\u304c\u542b\u307e\u308c\u307e\u3059\u3002 \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7528ER\u56f3\u306e\u4f5c\u6210\u624b\u9806\u30ac\u30a4\u30c9 \u4ee5\u4e0b\u306b\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7528\u306eER\u56f3\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\u3092\u793a\u3057\u307e\u3059\uff1a \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u7279\u5b9a\uff1a\u307e\u305a\u3001\u30c7ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09","og_url":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/","og_site_name":"Visual Paradigm Guides Japanese","article_published_time":"2026-02-05T17:26:03+00:00","og_image":[{"width":606,"height":369,"url":"https:\/\/guides.visual-paradigm.com\/ja\/wp-content\/uploads\/sites\/4\/2026\/02\/from-conceptual-to-logical-to-physical-erd-1.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_misc":{"\u57f7\u7b46\u8005":"vpadmin","\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593":"9\u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#article","isPartOf":{"@id":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/"},"headline":"ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09","datePublished":"2026-02-05T17:26:03+00:00","mainEntityOfPage":{"@id":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/"},"wordCount":241,"commentCount":0,"image":{"@id":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#primaryimage"},"thumbnailUrl":"https:\/\/guides.visual-paradigm.com\/ja\/wp-content\/uploads\/sites\/4\/2026\/02\/from-conceptual-to-logical-to-physical-erd-1.png","articleSection":["Data Modeling \/ Database"],"inLanguage":"ja","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/","url":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/","name":"ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09 - Visual Paradigm Guides Japanese","isPartOf":{"@id":"https:\/\/guides.visual-paradigm.com\/ja\/#website"},"primaryImageOfPage":{"@id":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#primaryimage"},"image":{"@id":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#primaryimage"},"thumbnailUrl":"https:\/\/guides.visual-paradigm.com\/ja\/wp-content\/uploads\/sites\/4\/2026\/02\/from-conceptual-to-logical-to-physical-erd-1.png","datePublished":"2026-02-05T17:26:03+00:00","author":{"@id":"https:\/\/guides.visual-paradigm.com\/ja\/#\/schema\/person\/292e97a06c90d6d605ddfd451bfdfe6f"},"breadcrumb":{"@id":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#breadcrumb"},"inLanguage":"ja","potentialAction":[{"@type":"ReadAction","target":["https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/"]}]},{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#primaryimage","url":"https:\/\/guides.visual-paradigm.com\/ja\/wp-content\/uploads\/sites\/4\/2026\/02\/from-conceptual-to-logical-to-physical-erd-1.png","contentUrl":"https:\/\/guides.visual-paradigm.com\/ja\/wp-content\/uploads\/sites\/4\/2026\/02\/from-conceptual-to-logical-to-physical-erd-1.png","width":606,"height":369},{"@type":"BreadcrumbList","@id":"https:\/\/guides.visual-paradigm.com\/ja\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-2of5\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/guides.visual-paradigm.com\/ja\/"},{"@type":"ListItem","position":2,"name":"Data Modeling \/ Database","item":"https:\/\/guides.visual-paradigm.com\/ja\/category\/data-modeling-database\/"},{"@type":"ListItem","position":3,"name":"ER\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u7fd2\u5f97\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u4f8b\u3092\u7528\u3044\u305f\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9\uff085\u56de\u30b7\u30ea\u30fc\u30ba\u306e\u7b2c2\u90e8\uff09"}]},{"@type":"WebSite","@id":"https:\/\/guides.visual-paradigm.com\/ja\/#website","url":"https:\/\/guides.visual-paradigm.com\/ja\/","name":"Visual Paradigm Guides Japanese","description":"Smart guides for an AI-driven world","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/guides.visual-paradigm.com\/ja\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ja"}]}},"_links":{"self":[{"href":"https:\/\/guides.visual-paradigm.com\/ja\/wp-json\/wp\/v2\/posts\/6811","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guides.visual-paradigm.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/guides.visual-paradigm.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/guides.visual-paradigm.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/guides.visual-paradigm.com\/ja\/wp-json\/wp\/v2\/comments?post=6811"}],"version-history":[{"count":0,"href":"https:\/\/guides.visual-paradigm.com\/ja\/wp-json\/wp\/v2\/posts\/6811\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/guides.visual-paradigm.com\/ja\/wp-json\/wp\/v2\/media\/6812"}],"wp:attachment":[{"href":"https:\/\/guides.visual-paradigm.com\/ja\/wp-json\/wp\/v2\/media?parent=6811"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/guides.visual-paradigm.com\/ja\/wp-json\/wp\/v2\/categories?post=6811"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/guides.visual-paradigm.com\/ja\/wp-json\/wp\/v2\/tags?post=6811"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}