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\u8981\u3059\u308b\u306b\u3001ERD\u306f\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30b7\u30b9\u30c6\u30e0\u306e\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u5c64\u306b\u4e3b\u306b\u7126\u70b9\u3092\u5f53\u3066\u3066\u3044\u308b\u306e\u306b\u5bfe\u3057\u3001\u30af\u30e9\u30b9\u56f3\u306fMVC\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e3\u3064\u306e\u5c64\u3059\u3079\u3066\u3092\u30ab\u30d0\u30fc\u3057\u3066\u3044\u307e\u3059\u3002\u30af\u30e9\u30b9\u56f3\u306f\u30b7\u30b9\u30c6\u30e0\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u3064\u3044\u3066\u3088\u308a\u5305\u62ec\u7684\u306a\u8996\u70b9\u3092\u63d0\u4f9b\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u52b9\u679c\u7684\u306b\u9023\u643a\u3059\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n

\u554f\u984c\u306e\u8aac\u660e \u2013 \u66f8\u5e97<\/h2>\n

\u79c1\u305f\u3061\u306f\u3001\u5c0f\u3055\u306a\u66f8\u5e97\u306e\u5728\u5eab\u3092\u7ba1\u7406\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u958b\u767a\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u306f\u5728\u5eab\u4e2d\u306e\u66f8\u7c4d\u3001\u8457\u8005\u3001\u304a\u3088\u3073\u5229\u7528\u53ef\u80fd\u306a\u30b3\u30d4\u30fc\u6570\u3092\u8ffd\u8de1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u9867\u5ba2\u306f\u66f8\u7c4d\u3092\u8cfc\u5165\u3067\u304d\u3001\u30b7\u30b9\u30c6\u30e0\u306f\u5728\u5eab\u3092\u305d\u308c\u306b\u5fdc\u3058\u3066\u66f4\u65b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u66f8\u5e97\u30b7\u30b9\u30c6\u30e0\u306eER\u56f3\u3092\u4f5c\u6210\u3059\u308b<\/h3>\n

\u3053\u306eER\u56f3\u3067\u306f\u30014\u3064\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u3042\u308a\u307e\u3059\uff1a\u66f8\u7c4d<\/code>, \u5728\u5eab<\/code>, \u9867\u5ba2<\/code>\u3001\u304a\u3088\u3073\u8cfc\u5165<\/code>\u3002\u66f8\u7c4d<\/code>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u5728\u5eab\u4e2d\u306e\u66f8\u7c4d\u3068\u305d\u306e\u8457\u8005\u3092\u8868\u3057\u307e\u3059\u3002\u5728\u5eab<\/code> \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u3001\u5404\u66f8\u7c4d\u306e\u5728\u5eab\u6570\u3092\u8ffd\u8de1\u3057\u307e\u3059\u3002\u305d\u3057\u3066 \u9867\u5ba2<\/code> \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u66f8\u5e97\u306e\u9867\u5ba2\u3092\u8868\u3057\u3001\u305d\u3057\u3066 \u8cfc\u5165<\/code> \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u5404\u9867\u5ba2\u304c\u8cfc\u5165\u3057\u305f\u66f8\u7c4d\u3092\u8ffd\u8de1\u3057\u307e\u3059\u3002<\/p>\n

\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u306f\u3001\u305d\u308c\u3089\u3092\u7d50\u3076\u7dda\u3067\u8868\u3055\u308c\u307e\u3059\u3002\u79c1\u305f\u3061\u306f\u3001\u66f8\u7c4d<\/code> \u3068 \u5728\u5eab<\/code> \u306e\u9593\uff08\u3064\u307e\u308a\u30011\u3064\u306e\u66f8\u7c4d\u306f\u5728\u5eab\u306b\u8907\u6570\u306e\u30b3\u30d4\u30fc\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u308b\uff09\u3001\u8cfc\u5165<\/code> \u3068 \u9867\u5ba2<\/code> \u306e\u9593\uff08\u3064\u307e\u308a\u3001\u9867\u5ba2\u306f\u8907\u6570\u306e\u8cfc\u5165\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u308b\uff09\u3001\u305d\u3057\u3066 \u8cfc\u5165<\/code> \u3068 \u66f8\u7c4d<\/code> \u306e\u9593\uff08\u3064\u307e\u308a\u30011\u3064\u306e\u66f8\u7c4d\u306f\u8907\u6570\u56de\u8cfc\u5165\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\uff09\u3002<\/p>\n

ERD\u306e\u4f5c\u6210<\/h3>\n

\"Bookstore<\/p>\n

\u8ad6\u7406ERD\u306b\u57fa\u3065\u3044\u3066\u30af\u30e9\u30b9\u56f3\u306e\u4f5c\u6210<\/h2>\n

\u3053\u306e\u30af\u30e9\u30b9\u56f3\u3067\u306f\u30014\u3064\u306e\u30af\u30e9\u30b9\u304c\u3042\u308a\u307e\u3059\uff1a\u66f8\u7c4d<\/code>, \u5728\u5eab<\/code>, \u9867\u5ba2<\/code>\u3001\u304a\u3088\u3073 \u8cfc\u5165<\/code>\u3002\u5404\u30af\u30e9\u30b9\u306e\u5c5e\u6027\u306f\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u5909\u6570\u3068\u3057\u3066\u8868\u3055\u308c\u307e\u3059\u3002ERD\u3068\u540c\u69d8\u306e\u95a2\u4fc2\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u8868\u73fe\u65b9\u6cd5\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u79c1\u305f\u3061\u306f\u3001\u66f8\u7c4d<\/code> \u304a\u3088\u3073 \u5728\u5eab<\/code>\u306f\u3001\u77e2\u5370\u306e\u5148\u304c\u300c\u304b\u3089\u300d\u3092\u5411\u3044\u3066\u3044\u308b\u7dda\u3067\u8868\u3055\u308c\u3001\u66f8\u7c4d<\/code> \u304b\u3089 \u5728\u5eab<\/code> \u3068\u6570\u5024 1<\/code> \u306e\u8fd1\u304f\u306b\u66f8\u7c4d<\/code> \u30af\u30e9\u30b9\u30680..*<\/code> \u306e\u8fd1\u304f\u306b\u5728\u5eab<\/code> \u30af\u30e9\u30b9\u3067\u3059\u3002\u79c1\u305f\u3061\u306f\u300c\u9867\u5ba2<\/code> \u304a\u3088\u3073 \u8cfc\u5165<\/code> \u306e\u9593\u306b1\u5bfe\u591a\u306e\u95a2\u4fc2\u304c\u3042\u308a\u3001\u66f8\u7c4d<\/code> \u3068\u8cfc\u5165<\/code> \u306e\u9593\u306b\u30821\u5bfe\u591a\u306e\u95a2\u4fc2\u304c\u3042\u308a\u3001\u8cfc\u5165<\/code> \u304b\u3089 \u9867\u5ba2<\/code> \u304a\u3088\u3073 \u66f8\u7c4d<\/code> \u3078\u5411\u304b\u3046\u77e2\u5370\u306e\u5148\u3092\u6301\u3064\u7dda\u3067\u8868\u3055\u308c\u307e\u3059\u3002<\/p>\n

\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u3092\u6d3b\u7528\u3057\u3001\u30af\u30e9\u30b9\u56f3\u3092\u5c0e\u51fa\u3059\u308b\u3053\u3068\u3067\u3001\u5c0f\u3055\u306a\u66f8\u5e97\u306e\u5728\u5eab\u3092\u7ba1\u7406\u3059\u308b\u5805\u7262\u3067\u4fdd\u5b88\u3057\u3084\u3059\u3044\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002<\/p>\n

\"Bookstore<\/p>\n

\u8ad6\u7406ERD\u3092\u7cbe\u67fb\u3057\u3066\u7269\u7406ERD\u3092\u69cb\u7bc9\u3059\u308b<\/h2>\n

\u3053\u306e\u7269\u7406ERD\u3067\u306f\u3001\u30af\u30e9\u30b9\u56f3\u306e\u69cb\u6587\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30c6\u30fc\u30d6\u30eb\u3092\u8868\u3057\u307e\u3059\u3002\u79c1\u305f\u3061\u306f\u3001\u540d\u524d\u3068\u8aac\u660e\u3092\u5f15\u6570\u3068\u3057\u3066\u53d7\u3051\u53d6\u308b\u300cTable<\/code>\u300d\u30de\u30af\u30ed\u3092\u5b9a\u7fa9\u3057\u3001\u30af\u30e9\u30b9\u3092\u9069\u5207\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3057\u307e\u3059\u3002\u307e\u305f\u3001PrimaryKey<\/code>\u304a\u3088\u3073ForeignKey<\/code>\u30de\u30af\u30ed\u3092\u5b9a\u7fa9\u3057\u3066\u3001\u4e3b\u30ad\u30fc\u304a\u3088\u3073\u5916\u90e8\u30ad\u30fc\u5c5e\u6027\u3092\u305d\u308c\u305e\u308c\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3057\u307e\u3059\u3002<\/p>\n

\u79c1\u305f\u3061\u306f4\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\uff1aBook<\/code>, Inventory<\/code>, Customer<\/code>\u3001\u304a\u3088\u3073Purchase<\/code>\u3001\u305d\u308c\u305e\u308c\u306b\u5c5e\u6027\u3092\u6301\u3061\u307e\u3059\u3002\u79c1\u305f\u3061\u306f[PK]<\/code>\u304a\u3088\u3073[FK]<\/code>\u6ce8\u91c8\u3092\u4f7f\u7528\u3057\u3066\u3001\u305d\u308c\u305e\u308c\u4e3b\u30ad\u30fc\u304a\u3088\u3073\u5916\u90e8\u30ad\u30fc\u5c5e\u6027\u3092\u793a\u3057\u307e\u3059\u3002\u307e\u305f\u3001--|><\/code>\u77e2\u5370\u306e\u5148\u7aef\u3092\u4f7f\u3063\u3066\u3001\u30c6\u30fc\u30d6\u30eb\u9593\u306e\u95a2\u4fc2\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n

\u7269\u7406ERD\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u3068\u305d\u306e\u95a2\u4fc2\u3092\u8996\u899a\u5316\u3067\u304d\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u3084\u6700\u9069\u5316\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n

\"Bookstore<\/p>\n

\u7269\u7406ERD\u306b\u57fa\u3065\u3044\u3066\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f5c\u6210\u3059\u308bSQL\u3092\u8a18\u8ff0\u3059\u308b<\/h2>\n

\u3053\u306e\u30b9\u30ad\u30fc\u30de\u306b\u306f\u3001\u5c5e\u6027\u3068\u95a2\u4fc2\u3092\u5099\u3048\u305f4\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001SQL\u8a00\u8a9e\u306e\u69cb\u6587\u306b\u5f93\u3063\u3066\u3044\u307e\u3059\u3002\u79c1\u305f\u3061\u306fCREATE TABLE<\/code>\u6587\u3092\u4f7f\u7528\u3057\u3066\u5404\u30c6\u30fc\u30d6\u30eb\u3092\u5b9a\u7fa9\u3057\u3001\u5c5e\u6027\u3068\u305d\u306e\u30c7\u30fc\u30bf\u578b\u304a\u3088\u3073\u5236\u7d04\uff08\u4f8b\u3048\u3070PRIMARY KEY<\/code>\u304a\u3088\u3073\u5916\u90e8\u30ad\u30fc<\/code>\u3002\u307e\u305f\u3001\u53c2\u7167<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30c6\u30fc\u30d6\u30eb\u9593\u306e\u95a2\u4fc2\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n

(*Visual Paradigm\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 \u2013 ERD\u304b\u3089\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u751f\u6210<\/strong>)<\/p>\n

\"ER<\/p>\n

\u3053\u306e\u30b9\u30ad\u30fc\u30de\u306f\u3001\u5b9a\u7fa9\u3055\u308c\u305f\u30b9\u30ad\u30fc\u30de\u306b\u5f93\u3063\u3066\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u304a\u3088\u3073\u53d6\u5f97\u3067\u304d\u308b\u7269\u7406\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n

\n

CREATE TABLE Book (
\nISBN VARCHAR(255) PRIMARY KEY,
\ntitle VARCHAR(255),
\nauthor VARCHAR(255)
\n);<\/p>\n

CREATE TABLE Inventory (
\nISBN VARCHAR(255) PRIMARY KEY REFERENCES Book(ISBN),
\nnumCopies INT
\n);<\/p>\n

CREATE TABLE Customer (
\nid INT PRIMARY KEY,
\nname VARCHAR(255),
\nemail VARCHAR(255)
\n);<\/p>\n

CREATE TABLE Purchase (
\nid INT PRIMARY KEY,
\ncustomerId INT REFERENCES Customer(id),
\nISBN VARCHAR(255) REFERENCES Book(ISBN),
\ndate DATE
\n);<\/p>\n<\/blockquote>\n

\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u4ee3\u66ff\u30a2\u30d7\u30ed\u30fc\u30c1\uff1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30de\u30c3\u30d4\u30f3\u30b0<\/h2>\n

ORM\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30de\u30c3\u30d4\u30f3\u30b0\uff09\u306f\u3001\u8907\u96d1\u306aSQL\u30af\u30a8\u30ea\u3092\u66f8\u304b\u305a\u306b\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3092\u4f7f\u3063\u3066\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u3084\u308a\u53d6\u308a\u3067\u304d\u308b\u3001\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u4ee3\u66ff\u624b\u6cd5\u3067\u3059\u3002\u8a00\u3044\u63db\u3048\u308c\u3070\u3001ORM\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3068\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u9593\u3092\u30de\u30c3\u30d4\u30f3\u30b0\u3059\u308b\u65b9\u6cd5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n

Hibernate\u3001Django ORM\u3001Sequelize\u306a\u3069\u306eORM\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306f\u3001\u958b\u767a\u8005\u304c\u30c6\u30fc\u30d6\u30eb\u3084\u884c\u306e\u4ee3\u308f\u308a\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u4f5c\u696d\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u9023\u643a\u30d7\u30ed\u30bb\u30b9\u3092\u7c21\u7d20\u5316\u3059\u308b\u30c4\u30fc\u30eb\u3084API\u306e\u30bb\u30c3\u30c8\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002ORM\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u8868\u3059\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3057\u3001\u305d\u306e\u30af\u30e9\u30b9\u306e\u5c5e\u6027\u3092\u5bfe\u5fdc\u3059\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30ab\u30e9\u30e0\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3059\u308b\u65b9\u6cd5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u69cb\u6587\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u30af\u30a8\u30ea\u3059\u308b\u65b9\u6cd5\u3082\u63d0\u4f9b\u3057\u3066\u304a\u308a\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u3001\u4fdd\u5b88\u3057\u3084\u3059\u304f\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n

\"Object<\/p>\n

ORM\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u591a\u304f\u306e\u8907\u96d1\u3055\u3092\u62bd\u8c61\u5316\u3057\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u30c7\u30fc\u30bf\u3068\u81ea\u7136\u306b\u3084\u308a\u53d6\u308a\u3059\u308b\u65b9\u6cd5\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u30d7\u30ed\u30bb\u30b9\u304c\u7c21\u7d20\u5316\u3055\u308c\u307e\u3059\u3002\u307e\u305f\u3001ORM\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u304c\u591a\u304f\u306e\u4e0b\u4f4d\u30ec\u30d9\u30eb\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u56fa\u6709\u306e\u8a73\u7d30\u3092\u51e6\u7406\u3059\u308b\u305f\u3081\u3001\u7570\u306a\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b7\u30b9\u30c6\u30e0\u9593\u3092\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u3082\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u3057\u304b\u3057\u3001ORM\u304c\u3059\u3079\u3066\u306e\u72b6\u6cc1\u306b\u304a\u3044\u3066\u6700\u9069\u306a\u89e3\u6c7a\u7b56\u3067\u306f\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002ORM\u306b\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3084\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u304c\u4f34\u3046\u5834\u5408\u304c\u3042\u308a\u3001\u7279\u5b9a\u306e\u7a2e\u985e\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306b\u306f\u9069\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u6700\u7d42\u7684\u306b\u306f\u3001ORM\u3092\u4f7f\u7528\u3059\u308b\u304b\u3001\u5f93\u6765\u306e\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u624b\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u304b\u306e\u9078\u629e\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u5177\u4f53\u7684\u306a\u8981\u4ef6\u3084\u958b\u767a\u30c1\u30fc\u30e0\u306e\u5c02\u9580\u77e5\u8b58\u304a\u3088\u3073\u597d\u307f\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002<\/p>\n

\u7d50\u8ad6<\/h2>\n

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\u672c\u8a18\u4e8b\u3067\u306f\u3001\u7269\u7406\u7684ERD\u3092\u4f5c\u6210\u3057\u3001\u305d\u308c\u304b\u3089\u30af\u30e9\u30b9\u56f3\u3092\u5c0e\u51fa\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u307e\u3057\u305f\u3002\u307e\u305f\u3001\u7269\u7406\u7684ERD\u306b\u57fa\u3065\u3044\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u3092\u751f\u6210\u3057\u3001\u7269\u7406\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3059\u308b\u306e\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u624b\u9806\u306b\u5f93\u3046\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u305d\u306e\u95a2\u4fc2\u3092\u660e\u78ba\u304b\u3064\u7c21\u6f54\u306b\u8868\u73fe\u3059\u308b\u3001\u826f\u597d\u306b\u69cb\u9020\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u5168\u4f53\u3068\u3057\u3066\u3001\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u306f\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5074\u9762\u3067\u3042\u308a\u3001ERD\u3084\u30af\u30e9\u30b9\u56f3\u306a\u3069\u306e\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u7406\u89e3\u3057\u3084\u3059\u304f\u3001\u4fdd\u5b88\u3057\u3084\u3059\u304f\u3001\u6642\u9593\u306e\u7d4c\u904e\u3068\u3068\u3082\u306b\u9032\u5316\u3057\u3084\u3059\u3044\u30b7\u30b9\u30c6\u30e0\u3092\u8a2d\u8a08\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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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\/mastering-er-modeling-a-step-by-step-guide-with-real-world-examples-part-4-of-5\/\" \/>\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\u7b2c4\u90e8\uff09 - Visual Paradigm Guides Japanese\" \/>\n<meta property=\"og:description\" content=\"\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a2d\u8a08 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