{"id":6554,"date":"2026-02-05T09:44:31","date_gmt":"2026-02-05T01:44:31","guid":{"rendered":"https:\/\/guides.visual-paradigm.com\/ja\/a-comprehensive-guide-to-database-normalization-with-examples\/"},"modified":"2026-02-05T09:44:31","modified_gmt":"2026-02-05T01:44:31","slug":"a-comprehensive-guide-to-database-normalization-with-examples","status":"publish","type":"post","link":"https:\/\/guides.visual-paradigm.com\/ja\/a-comprehensive-guide-to-database-normalization-with-examples\/","title":{"rendered":"\u4f8b\u3092\u4ea4\u3048\u3066\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6b63\u898f\u5316\u306e\u5305\u62ec\u7684\u30ac\u30a4\u30c9"},"content":{"rendered":"

\u306f\u3058\u3081\u306b<\/h2>\n

\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6b63\u898f\u5316\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u306e\u4e16\u754c\u306b\u304a\u3044\u3066\u6975\u3081\u3066\u91cd\u8981\u306a\u6982\u5ff5\u3067\u3059\u3002\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3092\u6e1b\u3089\u3057\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u3092\u6700\u9069\u5316\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002\u6b63\u898f\u5316\u306f\u3001\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u7684\u306b\u6574\u7406\u3057\u3001\u66f4\u65b0\u7570\u5e38\u3001\u633f\u5165\u7570\u5e38\u3001\u524a\u9664\u7570\u5e38\u3068\u3044\u3063\u305f\u4e00\u822c\u7684\u306a\u30c7\u30fc\u30bf\u7570\u5e38\u3092\u9632\u3050\u305f\u3081\u306e\u30eb\u30fc\u30eb\u3068\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306e\u30bb\u30c3\u30c8\u3067\u3059\u3002<\/p>\n

\u672c\u8a18\u4e8b\u3067\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6b63\u898f\u5316\u306e\u57fa\u790e\u3001\u3055\u307e\u3056\u307e\u306a\u6b63\u898f\u5f62\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3001\u5404\u30ec\u30d9\u30eb\u306e\u6b63\u898f\u5316\u3092\u8aac\u660e\u3059\u308b\u305f\u3081\u306e\u5b9f\u969b\u306e\u4f8b\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n

\u306a\u305c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u6b63\u898f\u5316\u3059\u308b\u306e\u304b\uff1f<\/h2>\n

\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6b63\u898f\u5316\u306e\u8a73\u7d30\u306b\u79fb\u308b\u524d\u306b\u3001\u306a\u305c\u305d\u308c\u304c\u5fc5\u8981\u306a\u306e\u304b\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u6b63\u898f\u5316\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n

    \n
  1. \u30c7\u30fc\u30bf\u6574\u5408\u6027\uff1a<\/strong>\u6b63\u898f\u5316\u306f\u3001\u91cd\u8907\u3092\u6e1b\u3089\u3059\u3053\u3068\u3067\u30c7\u30fc\u30bf\u306e\u6b63\u78ba\u6027\u3068\u4e00\u8cab\u6027\u3092\u7dad\u6301\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u30c7\u30fc\u30bf\u304c\u91cd\u8907\u305b\u305a\u306b\u4fdd\u5b58\u3055\u308c\u308b\u5834\u5408\u3001\u30a8\u30e9\u30fc\u306e\u767a\u751f\u30ea\u30b9\u30af\u304c\u4f4e\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n
  2. \u52b9\u7387\u7684\u306a\u30b9\u30c8\u30ec\u30fc\u30b8\uff1a<\/strong>\u6b63\u898f\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u3001\u91cd\u8907\u30c7\u30fc\u30bf\u304c\u6700\u5c0f\u9650\u306b\u306a\u308b\u305f\u3081\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u9818\u57df\u3092\u3088\u308a\u5c11\u306a\u304f\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u7dcf\u30b3\u30b9\u30c8\u304c\u524a\u6e1b\u3055\u308c\u307e\u3059\u3002<\/li>\n
  3. \u30af\u30a8\u30ea\u6700\u9069\u5316\uff1a<\/strong>\u6b63\u898f\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306f\u3001\u30af\u30a8\u30ea\u304c\u3088\u308a\u52b9\u7387\u7684\u306b\u306a\u308a\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u3001\u5927\u304d\u306a\u975e\u6b63\u898f\u5316\u3055\u308c\u305f\u30c6\u30fc\u30d6\u30eb\u3067\u306f\u306a\u304f\u3001\u3088\u308a\u5c0f\u3055\u304f\u69cb\u9020\u5316\u3055\u308c\u305f\u30c6\u30fc\u30d6\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002<\/li>\n
  4. \u67d4\u8edf\u6027\uff1a<\/strong>\u6b63\u898f\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u3001\u30c7\u30fc\u30bf\u8981\u4ef6\u3084\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u306e\u5909\u66f4\u306b\u5bfe\u5fdc\u3057\u3084\u3059\u3044\u3068\u3044\u3046\u70b9\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u3059\u3002<\/li>\n<\/ol>\n

    \u6b63\u898f\u5316\u306e\u6bb5\u968e<\/h2>\n

    \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6b63\u898f\u5316\u306f\u901a\u5e38\u3001\u3044\u304f\u3064\u304b\u306e\u6bb5\u968e\u306b\u5206\u3051\u3089\u308c\u3001\u3053\u308c\u3092\u6b63\u898f\u5f62\u3068\u547c\u3073\u307e\u3059\u3002\u6700\u3082\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b\u6b63\u898f\u5f62\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\uff1a\"\"<\/p>\n

      \n
    1. \u7b2c\u4e00\u6b63\u898f\u5f62\uff081NF\uff09\uff1a<\/strong>\u30c6\u30fc\u30d6\u30eb\u5185\u306e\u5404\u5217\u304c\u539f\u5b50\u7684\u3067\u5206\u5272\u3067\u304d\u306a\u3044\u5024\u3092\u542b\u3080\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002\u7e70\u308a\u8fd4\u3057\u30b0\u30eb\u30fc\u30d7\u304c\u3042\u3063\u3066\u306f\u306a\u3089\u305a\u3001\u5404\u5217\u306b\u306f\u4e00\u610f\u306e\u540d\u524d\u304c\u4ed8\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n
    2. \u7b2c\u4e8c\u6b63\u898f\u5f62\uff082NF\uff09\uff1a<\/strong>1NF\u3092\u57fa\u76e4\u3068\u3057\u3066\u30012NF\u306f\u90e8\u5206\u7684\u4f9d\u5b58\u3092\u6392\u9664\u3057\u307e\u3059\u3002\u30c6\u30fc\u30d6\u30eb\u304c2NF\u306b\u3042\u308b\u306e\u306f\u30011NF\u306b\u3042\u308a\u3001\u304b\u3064\u3059\u3079\u3066\u306e\u975e\u30ad\u30fc\u5c5e\u6027\u304c\u4e3b\u30ad\u30fc\u5168\u4f53\u306b\u95a2\u6570\u7684\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u5834\u5408\u3067\u3059\u3002<\/li>\n
    3. \u7b2c\u4e09\u6b63\u898f\u5f62\uff083NF\uff09\uff1a<\/strong>2NF\u3092\u57fa\u76e4\u3068\u3057\u3066\u30013NF\u306f\u63a8\u79fb\u7684\u4f9d\u5b58\u3092\u6392\u9664\u3057\u307e\u3059\u3002\u30c6\u30fc\u30d6\u30eb\u304c3NF\u306b\u3042\u308b\u306e\u306f\u30012NF\u306b\u3042\u308a\u3001\u304b\u3064\u3059\u3079\u3066\u306e\u975e\u30ad\u30fc\u5c5e\u6027\u304c\u4e3b\u30ad\u30fc\u306b\u95a2\u6570\u7684\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u304c\u3001\u4ed6\u306e\u975e\u30ad\u30fc\u5c5e\u6027\u306b\u4f9d\u5b58\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u3067\u3059\u3002<\/li>\n
    4. \u30dc\u30fc\u30a4\u30b9\u30fb\u30b3\u30c3\u30c9\u6b63\u898f\u5f62\uff08BCNF\uff09\uff1a<\/strong>3NF\u306e\u3088\u308a\u53b3\u683c\u306a\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3042\u308a\u3001\u3059\u3079\u3066\u306e\u975e\u81ea\u660e\u306a\u95a2\u6570\u7684\u4f9d\u5b58\u304c\u30b9\u30fc\u30d1\u30fc\u30ad\u30fc\u3067\u3042\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u90e8\u5206\u7684\u4f9d\u5b58\u3084\u63a8\u79fb\u7684\u4f9d\u5b58\u306f\u8a31\u3055\u308c\u307e\u305b\u3093\u3002<\/li>\n
    5. \u7b2c\u56db\u6b63\u898f\u5f62\uff084NF\uff09\uff1a<\/strong>4NF\u306f\u3001\u3042\u308b\u5c5e\u6027\u304c\u5225\u306e\u5c5e\u6027\u306b\u4f9d\u5b58\u3059\u308b\u304c\u3001\u4e3b\u30ad\u30fc\u306e\u95a2\u6570\u3067\u306f\u306a\u3044\u591a\u5024\u4f9d\u5b58\u3092\u6271\u3044\u307e\u3059\u3002<\/li>\n
    6. \u7b2c\u4e94\u6b63\u898f\u5f62\uff085NF\uff09\u307e\u305f\u306f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30fb\u30b8\u30e7\u30a4\u30f3\u6b63\u898f\u5f62\uff08PJNF\uff09\uff1a<\/strong>\u3053\u308c\u3089\u306e\u6b63\u898f\u5f62\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u304c4NF\u306b\u3042\u308b\u304c\u3001\u3055\u3089\u306b\u6700\u9069\u5316\u53ef\u80fd\u306a\u30b8\u30e7\u30a4\u30f3\u4f9d\u5b58\u304c\u3042\u308b\u5834\u5408\u3092\u6271\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n

      \u305d\u308c\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6b63\u898f\u5f62\u3092\u4f8b\u3092\u7528\u3044\u3066\u8aac\u660e\u3057\u307e\u3057\u3087\u3046\uff1a<\/p>\n

      \u7b2c\u4e00\u6b63\u898f\u5f62\uff081NF\uff09<\/h2>\n

      \u9867\u5ba2\u306e\u6ce8\u6587\u3092\u683c\u7d0d\u3059\u308b\u6b63\u898f\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u30c6\u30fc\u30d6\u30eb\u3092\u691c\u8a0e\u3059\u308b\uff1a<\/p>\n\n\n\n\n\n\n\n
      \u6ce8\u6587ID<\/th>\n\u9867\u5ba2<\/th>\n\u5546\u54c1<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n\u30b8\u30e7\u30f3<\/td>\n\u308a\u3093\u3054\u3001\u30d0\u30ca\u30ca\u3001\u30aa\u30ec\u30f3\u30b8<\/td>\n<\/tr>\n
      2<\/td>\n\u30a2\u30ea\u30b9<\/td>\n\u3076\u3069\u3046\u3001\u30a4\u30c1\u30b4<\/td>\n<\/tr>\n
      3<\/td>\n\u30dc\u30d6<\/td>\n\u30ec\u30e2\u30f3\u3001\u30e9\u30a4\u30e0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u3053\u306e\u30c6\u30fc\u30d6\u30eb\u306f1NF\u306b\u9055\u53cd\u3057\u3066\u3044\u308b\u3002\u306a\u305c\u306a\u3089\u3001\u5546\u54c1<\/code>\u5217\u306b\u9805\u76ee\u306e\u30ea\u30b9\u30c8\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u305f\u3081\u3067\u3042\u308b\u30021NF\u306b\u6e96\u62e0\u3055\u305b\u308b\u305f\u3081\u3001\u5546\u54c1\u3092\u500b\u5225\u306e\u884c\u306b\u5206\u5272\u3059\u308b\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
      \u6ce8\u6587ID<\/th>\n\u9867\u5ba2<\/th>\n\u5546\u54c1<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n\u30b8\u30e7\u30f3<\/td>\n\u308a\u3093\u3054<\/td>\n<\/tr>\n
      1<\/td>\n\u30b8\u30e7\u30f3<\/td>\n\u30d0\u30ca\u30ca<\/td>\n<\/tr>\n
      1<\/td>\n\u30b8\u30e7\u30f3<\/td>\n\u30aa\u30ec\u30f3\u30b8<\/td>\n<\/tr>\n
      2<\/td>\n\u30a2\u30ea\u30b9<\/td>\n\u30d6\u30c9\u30a6<\/td>\n<\/tr>\n
      2<\/td>\n\u30a2\u30ea\u30b9<\/td>\n\u30a4\u30c1\u30b4<\/td>\n<\/tr>\n
      3<\/td>\n\u30dc\u30d6<\/td>\n\u30ec\u30e2\u30f3<\/td>\n<\/tr>\n
      3<\/td>\n\u30dc\u30d6<\/td>\n\u30e9\u30a4\u30e0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u4eca\u3001\u5404\u30bb\u30eb\u306b\u306f\u539f\u5b50\u5024\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u30c6\u30fc\u30d6\u30eb\u306f1NF\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n

      \u7b2c\u4e8c\u6b63\u898f\u5f62\uff082NF\uff09<\/h2>\n

      \u5b66\u751f\u3068\u305d\u306e\u6388\u696d\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u683c\u7d0d\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n\n\n\n\n\n
      \u5b66\u751fID<\/th>\n\u6388\u696dID<\/th>\n\u6388\u696d\u540d<\/th>\n\u6559\u54e1<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n101<\/td>\n\u6570\u5b66<\/td>\n\u30b9\u30df\u30b9\u6559\u6388<\/td>\n<\/tr>\n
      1<\/td>\n102<\/td>\n\u7269\u7406\u5b66<\/td>\n\u30b8\u30e7\u30f3\u30bd\u30f3\u6559\u6388<\/td>\n<\/tr>\n
      2<\/td>\n101<\/td>\n\u6570\u5b66<\/td>\n\u30b9\u30df\u30b9\u6559\u6388<\/td>\n<\/tr>\n
      3<\/td>\n103<\/td>\n\u6b74\u53f2<\/td>\n\u30c7\u30a4\u30d3\u30b9\u6559\u6388<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u3053\u306e\u30c6\u30fc\u30d6\u30eb\u306f2NF\u3092\u9055\u53cd\u3057\u3066\u3044\u308b\u3002\u306a\u305c\u306a\u3089\u3001\u6559\u54e1<\/code>\u5c5e\u6027\u306f\u3001\u4e21\u65b9\u306e\u5b66\u751fID<\/code>\u3068\u6388\u696dID<\/code>\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u305f\u3081\u3067\u3042\u308b\u30022NF\u3092\u9054\u6210\u3059\u308b\u305f\u3081\u3001\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u30922\u3064\u306e\u5225\u3005\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5206\u5272\u3059\u308b\u3002<\/p>\n

      \u5b66\u751f\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n
      \u5b66\u751fID<\/th>\n\u5b66\u751f\u540d<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n\u30b8\u30e7\u30f3<\/td>\n<\/tr>\n
      2<\/td>\n\u30a8\u30ea\u30b9<\/td>\n<\/tr>\n
      3<\/td>\n\u30dc\u30d6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u6388\u696d\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n
      \u6388\u696dID<\/th>\n\u6388\u696d\u540d<\/th>\n\u6559\u54e1<\/th>\n<\/tr>\n<\/thead>\n
      101<\/td>\n\u6570\u5b66<\/td>\n\u30b9\u30df\u30b9\u6559\u6388<\/td>\n<\/tr>\n
      102<\/td>\n\u7269\u7406\u5b66<\/td>\n\u30b8\u30e7\u30f3\u30bd\u30f3\u6559\u6388<\/td>\n<\/tr>\n
      103<\/td>\n\u6b74\u53f2<\/td>\n\u30c7\u30a4\u30d3\u30b9\u6559\u6388<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u3055\u3066\u3001\u6559\u54e1<\/code>\u5c5e\u6027\u306f\u3001\u6388\u696dID<\/code>\u306b\u306e\u307f\u4f9d\u5b58\u3057\u3001\u30c6\u30fc\u30d6\u30eb\u306f2NF\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n

      \u7b2c\u4e09\u6b63\u898f\u5f62\uff083NF\uff09<\/h2>\n

      \u5f93\u696d\u54e1\u3068\u305d\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u683c\u7d0d\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n\n\n\n\n\n
      \u5f93\u696d\u54e1ID<\/th>\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8ID<\/th>\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u540d<\/th>\n\u30de\u30cd\u30fc\u30b8\u30e3\u30fc<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n101<\/td>\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8A<\/td>\n\u30b8\u30e7\u30f3<\/td>\n<\/tr>\n
      1<\/td>\n102<\/td>\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8B<\/td>\n\u30a2\u30ea\u30b9<\/td>\n<\/tr>\n
      2<\/td>\n101<\/td>\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8A<\/td>\n\u30b8\u30e7\u30f3<\/td>\n<\/tr>\n
      3<\/td>\n103<\/td>\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8C<\/td>\n\u30dc\u30d6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u3053\u306e\u30c6\u30fc\u30d6\u30eb\u306f3NF\u3092\u9055\u53cd\u3057\u3066\u3044\u308b\u306e\u306f\u3001\u30de\u30cd\u30fc\u30b8\u30e3\u30fc<\/code>\u5c5e\u6027\u306f\u3001\u4e3b\u30ad\u30fc\u306b\u76f4\u63a5\u3067\u306f\u306a\u304f\u3001\u5f93\u696d\u54e1ID<\/code>\u3001\u4e3b\u30ad\u30fc\u306b\u76f4\u63a5\u3067\u306f\u306a\u304f\u30023NF\u306b\u9054\u3059\u308b\u305f\u3081\u306b\u3001\u30c6\u30fc\u30d6\u30eb\u30922\u3064\u306e\u5225\u3005\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5206\u5272\u3057\u307e\u3059\uff1a<\/p>\n

      \u5f93\u696d\u54e1\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n
      \u5f93\u696d\u54e1ID<\/th>\n\u5f93\u696d\u54e1\u540d<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n\u30b8\u30e7\u30f3<\/td>\n<\/tr>\n
      2<\/td>\n\u30a8\u30ea\u30b9<\/td>\n<\/tr>\n
      3<\/td>\n\u30dc\u30d6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n
      \u30d7\u30ed\u30b8\u30a7\u30af\u30c8ID<\/th>\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u540d<\/th>\n<\/tr>\n<\/thead>\n
      101<\/td>\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8A<\/td>\n<\/tr>\n
      102<\/td>\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8B<\/td>\n<\/tr>\n
      103<\/td>\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u5f93\u696d\u54e1\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n\n
      \u5f93\u696d\u54e1ID<\/th>\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8ID<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n101<\/td>\n<\/tr>\n
      1<\/td>\n102<\/td>\n<\/tr>\n
      2<\/td>\n101<\/td>\n<\/tr>\n
      3<\/td>\n103<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u3055\u3066\u3001\u30de\u30cd\u30fc\u30b8\u30e3\u30fc<\/code>\u5c5e\u6027\u306f\u3001ProjectID<\/code>\u306b\u4f9d\u5b58\u3057\u3066\u304a\u308a\u3001\u30c6\u30fc\u30d6\u30eb\u306f3NF\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n

      \u30dc\u30fc\u30a4\u30b9\u30fb\u30b3\u30c3\u30c9\u6b63\u898f\u5f62\uff08BCNF\uff09<\/h2>\n

      BCNF\u306f3NF\u3088\u308a\u3082\u53b3\u683c\u306a\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3059\u3002BCNF\u3092\u8aac\u660e\u3059\u308b\u305f\u3081\u306b\u3001\u6559\u6388\u3068\u305d\u306e\u7814\u7a76\u5206\u91ce\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u683c\u7d0d\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n\n\n\n\n
      \u6559\u6388ID<\/th>\n\u7814\u7a76\u5206\u91ce<\/th>\n\u30aa\u30d5\u30a3\u30b9\u756a\u53f7<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n\u4eba\u5de5\u77e5\u80fd<\/td>\n101<\/td>\n<\/tr>\n
      2<\/td>\n\u6a5f\u68b0\u5b66\u7fd2<\/td>\n102<\/td>\n<\/tr>\n
      3<\/td>\n\u4eba\u5de5\u77e5\u80fd<\/td>\n103<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u3053\u306e\u30c6\u30fc\u30d6\u30eb\u306fBCNF\u306b\u9055\u53cd\u3057\u3066\u3044\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u3001\u7814\u7a76\u5206\u91ce<\/code>\u3068\u30aa\u30d5\u30a3\u30b9\u756a\u53f7<\/code>\u306e\u9593\u306b\u975e\u81ea\u660e\u306a\u95a2\u6570\u5f93\u5c5e\u95a2\u4fc2\u304c\u3042\u308b\u304b\u3089\u3067\u3059\uff08\u3064\u307e\u308a\u3001\u30aa\u30d5\u30a3\u30b9\u756a\u53f7\u306f\u7814\u7a76\u5206\u91ce\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\uff09\u3002BCNF\u3092\u9054\u6210\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u30922\u3064\u306e\u5225\u3005\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5206\u5272\u3057\u307e\u3059\uff1a<\/p>\n

      \u6559\u6388\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n
      \u6559\u6388ID<\/th>\n\u6559\u6388\u540d<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n\u30b9\u30df\u30b9\u6559\u6388<\/td>\n<\/tr>\n
      2<\/td>\n\u30b8\u30e7\u30f3\u30bd\u30f3\u6559\u6388<\/td>\n<\/tr>\n
      3<\/td>\n\u30c7\u30a4\u30d3\u30b9\u6559\u6388<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u7814\u7a76\u5206\u91ce\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong><\/p>\n\n\n\n\n\n\n
      \u7814\u7a76\u5206\u91ce<\/th>\n\u4e8b\u52d9\u5ba4\u756a\u53f7<\/th>\n<\/tr>\n<\/thead>\n
      \u4eba\u5de5\u77e5\u80fd<\/td>\n101<\/td>\n<\/tr>\n
      \u6a5f\u68b0\u5b66\u7fd2<\/td>\n102<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u6559\u6388\u7814\u7a76\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n
      \u6559\u6388ID<\/th>\n\u7814\u7a76\u5206\u91ce<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n\u4eba\u5de5\u77e5\u80fd<\/td>\n<\/tr>\n
      2<\/td>\n\u6a5f\u68b0\u5b66\u7fd2<\/td>\n<\/tr>\n
      3<\/td>\n\u4eba\u5de5\u77e5\u80fd<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u73fe\u5728\u3001\u975e\u81ea\u660e\u306a\u95a2\u6570\u5f93\u5c5e\u304c\u5b58\u5728\u3057\u306a\u3044\u305f\u3081\u3001\u30c6\u30fc\u30d6\u30eb\u306fBCNF\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n

      \u7b2c\u56db\u6b63\u898f\u5f62\uff084NF\uff09<\/h2>\n

      4NF\u306f\u591a\u5024\u4f9d\u5b58\u6027\u3092\u53d6\u308a\u6271\u3044\u307e\u3059\u3002\u672c\u3068\u8457\u8005\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u683c\u7d0d\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n\n\n\n\n
      \u66f8\u7c4dID<\/th>\n\u30bf\u30a4\u30c8\u30eb<\/th>\n\u8457\u8005<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n\u66f8\u7c4dA<\/td>\n\u8457\u8005X\u3001\u8457\u8005Y<\/td>\n<\/tr>\n
      2<\/td>\n\u66f8\u7c4dB<\/td>\n\u8457\u8005Y\u3001\u8457\u8005Z<\/td>\n<\/tr>\n
      3<\/td>\n\u66f8\u7c4dC<\/td>\n\u8457\u8005X<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u3053\u306e\u30c6\u30fc\u30d6\u30eb\u306f4NF\u3092\u9055\u53cd\u3057\u3066\u3044\u308b\u3002\u306a\u305c\u306a\u3089\u3001\u6b21\u306e\u9593\u306b\u3042\u308b\u591a\u5024\u4f9d\u5b58\u95a2\u4fc2\u304c\u3042\u308b\u304b\u3089\u3067\u3042\u308b\u3002\u66f8\u7c4dID<\/code> \u3068 \u8457\u8005<\/code>\u30024NF\u3092\u9054\u6210\u3059\u308b\u305f\u3081\u3001\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u30923\u3064\u306e\u5225\u3005\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5206\u5272\u3059\u308b\u3002<\/p>\n

      \u66f8\u7c4d\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n
      \u66f8\u7c4dID<\/th>\n\u30bf\u30a4\u30c8\u30eb<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n\u66f8\u7c4dA<\/td>\n<\/tr>\n
      2<\/td>\n\u66f8\u7c4dB<\/td>\n<\/tr>\n
      3<\/td>\n\u66f8\u7c4dC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u8457\u8005\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n
      \u8457\u8005ID<\/th>\n\u8457\u8005\u540d<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n\u8457\u8005X<\/td>\n<\/tr>\n
      2<\/td>\n\u8457\u8005Y<\/td>\n<\/tr>\n
      3<\/td>\n\u8457\u8005Z<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      BookAuthors \u30c6\u30fc\u30d6\u30eb\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
      BookID<\/th>\nAuthorID<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\n1<\/td>\n<\/tr>\n
      1<\/td>\n2<\/td>\n<\/tr>\n
      2<\/td>\n2<\/td>\n<\/tr>\n
      2<\/td>\n3<\/td>\n<\/tr>\n
      3<\/td>\n1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u73fe\u5728\u3001\u5404\u30c6\u30fc\u30d6\u30eb\u306f4NF\u306b\u3042\u308a\u3001\u591a\u5024\u4f9d\u5b58\u95a2\u4fc2\u306f\u524a\u9664\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

      \u7b2c\u4e94\u6b63\u898f\u5f62\uff085NF\uff09\u307e\u305f\u306f\u6295\u5f71\u7d50\u5408\u6b63\u898f\u5f62\uff08PJNF\uff09<\/h2>\n

      5NF\u307e\u305f\u306fPJNF\u306f\u7d50\u5408\u4f9d\u5b58\u95a2\u4fc2\u3092\u53d6\u308a\u6271\u3044\u3001\u3053\u308c\u306f\u3053\u306e\u5165\u9580\u8a18\u4e8b\u306e\u7bc4\u56f2\u3092\u8d85\u3048\u3066\u3044\u307e\u3059\u30025NF\u3092\u9054\u6210\u3059\u308b\u306b\u306f\u901a\u5e38\u3001\u3055\u3089\u306a\u308b\u5206\u89e3\u304c\u5fc5\u8981\u3067\u3042\u308a\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306f\u3057\u3070\u3057\u3070\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

      \u7d50\u8ad6<\/h2>\n

      \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6b63\u898f\u5316\u306f\u3001\u30c7\u30fc\u30bf\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u6700\u9069\u5316\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u306e\u5411\u4e0a\u3001\u30c7\u30fc\u30bf\u306e\u7570\u5e38\u306e\u524a\u6e1b\u3092\u76ee\u7684\u3068\u3057\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306b\u304a\u3051\u308b\u91cd\u8981\u306a\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002\u6b63\u898f\u5316\u3055\u308c\u305f\u30c6\u30fc\u30d6\u30eb\u306b\u30c7\u30fc\u30bf\u3092\u6574\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b7\u30b9\u30c6\u30e0\u306e\u52b9\u7387\u6027\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

      BCNF\u30844NF\u306a\u3069\u306e\u9ad8\u3044\u6b63\u898f\u5f62\u3092\u9054\u6210\u3059\u308b\u3053\u3068\u304c\u3001\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u3068\u3063\u3066\u5e38\u306b\u5fc5\u8981\u3068\u306f\u9650\u3089\u306a\u3044\u3053\u3068\u3092\u899a\u3048\u3066\u304a\u3044\u3066\u304f\u3060\u3055\u3044\u3002\u6b63\u898f\u5316\u306e\u30ec\u30d9\u30eb\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5177\u4f53\u7684\u306a\u8981\u4ef6\u304a\u3088\u3073\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002<\/p>\n

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- 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\/a-comprehensive-guide-to-database-normalization-with-examples\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4f8b\u3092\u4ea4\u3048\u3066\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6b63\u898f\u5316\u306e\u5305\u62ec\u7684\u30ac\u30a4\u30c9 - Visual Paradigm Guides Japanese\" \/>\n<meta property=\"og:description\" content=\"\u306f\u3058\u3081\u306b 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