{"id":1985,"date":"2026-03-26T10:49:01","date_gmt":"2026-03-26T10:49:01","guid":{"rendered":"https:\/\/www.go-diagram.com\/ja\/business-rules-to-erd-framework\/"},"modified":"2026-03-26T10:49:01","modified_gmt":"2026-03-26T10:49:01","slug":"business-rules-to-erd-framework","status":"publish","type":"post","link":"https:\/\/www.go-diagram.com\/ja\/business-rules-to-erd-framework\/","title":{"rendered":"\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u304b\u3089ERD\u3078\uff1a\u6bb5\u968e\u7684\u306a\u5909\u63db\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af"},"content":{"rendered":"<p>\u5805\u7262\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u7bc9\u306f\u3001\u6700\u521d\u306e\u30b3\u30fc\u30c9\u884c\u3092\u66f8\u304f\u308b\u308b\u305a\u3063\u3068\u524d\u304b\u3089\u59cb\u307e\u308a\u307e\u3059\u3002\u305d\u306e\u57fa\u76e4\u306f\u3001\u30d3\u30b8\u30cd\u30b9\u904b\u55b6\u3092\u99c6\u52d5\u3059\u308b\u30ed\u30b8\u30c3\u30af\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306b\u3042\u308a\u307e\u3059\u3002\u30d3\u30b8\u30cd\u30b9\u8981\u4ef6\u304c\u66d6\u6627\u3067\u3042\u3063\u305f\u308a\u8aa4\u89e3\u3055\u308c\u305f\u308a\u3059\u308b\u3068\u3001\u7d50\u679c\u3068\u3057\u3066\u751f\u3058\u308b\u30c7\u30fc\u30bf\u69cb\u9020\u306f\u8106\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u3092\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u56f3\uff08ERD\uff09\u306b\u5909\u63db\u3059\u308b\u305f\u3081\u306e\u69cb\u9020\u5316\u3055\u308c\u305f\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u3088\u308a\u3001\u7279\u5b9a\u306e\u30c4\u30fc\u30eb\u3084\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u4f9d\u5b58\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u304c\u7d44\u7e54\u306e\u30cb\u30fc\u30ba\u3092\u6b63\u78ba\u306b\u53cd\u6620\u3059\u308b\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u62bd\u8c61\u7684\u306a\u6982\u5ff5\u3092\u5177\u4f53\u7684\u306a\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306b\u5909\u63db\u3059\u308b\u306b\u306f\u3001\u6b63\u78ba\u3055\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8ff0\u3079\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<em>\u300c\u9867\u5ba2\u306f\u8907\u6570\u306e\u6ce8\u6587\u3092\u63d0\u51fa\u3067\u304d\u307e\u3059\u304c\u3001\u5404\u6ce8\u6587\u306f\u3061\u3087\u3046\u30691\u4eba\u306e\u9867\u5ba2\u306b\u5c5e\u3057\u307e\u3059\u300d<\/em>\u9069\u5207\u306a\u5909\u63db\u304c\u884c\u308f\u308c\u306a\u3044\u5834\u5408\u3001\u3053\u306e\u30ed\u30b8\u30c3\u30af\u306f\u5b9f\u88c5\u4e2d\u306b\u5931\u308f\u308c\u305f\u308a\u8aa4\u89e3\u3055\u308c\u305f\u308a\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4f53\u7cfb\u7684\u306a\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306b\u5f93\u3046\u3053\u3068\u3067\u3001\u6280\u8853\u30c1\u30fc\u30e0\u306f\u30b9\u30b1\u30fc\u30e9\u30d6\u30eb\u3067\u4fdd\u5b88\u53ef\u80fd\u3067\u3042\u308a\u3001\u904b\u7528\u4e0a\u306e\u73fe\u5b9f\u3068\u6574\u5408\u6027\u306e\u3042\u308b\u30b9\u30ad\u30fc\u30de\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Hand-drawn whiteboard infographic illustrating the 5-step framework for translating business rules into Entity Relationship Diagrams (ERD): identify entities and attributes, map relationships and cardinality (1:1, 1:N, M:N), apply normalization forms (1NF, 2NF, 3NF), validate against business constraints, and iterate with documentation. Includes visual examples of associative entities, junction tables, optionality symbols, common pitfalls, and a data dictionary checklist for robust database design.\" decoding=\"async\" src=\"https:\/\/www.go-diagram.com\/wp-content\/uploads\/2026\/03\/business-rules-to-erd-translation-framework-infographic.jpg\"\/><\/figure>\n<\/div>\n<h2>\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u306e\u6838\u5fc3\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u7406\u89e3 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\u6f5c\u5728\u7684\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u62bd\u51fa<\/h3>\n<p>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3084\u30a4\u30f3\u30bf\u30d3\u30e5\u30fc\u306e\u8ee2\u8a18\u8cc7\u6599\u3092\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u983b\u7e41\u306b\u8a00\u53ca\u3055\u308c\u308b\u540d\u8a5e\u3092\u63a2\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4f8b\u3048\u3070\u3001\u5c0f\u58f2\u306e\u6587\u8108\u3067\u306f\u3001\u300c<em>\u88fd\u54c1<\/em>, <em>\u5e97\u8217<\/em>, <em>\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc<\/em>\u3001\u304a\u3088\u3073<em>\u9867\u5ba2<\/em>\u300d\u304c\u5f37\u529b\u306a\u5019\u88dc\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30c6\u30ad\u30b9\u30c8\u3092\u78ba\u8a8d\u3059\u308b\uff1a<\/strong>\u4e00\u610f\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8868\u3059\u3059\u3079\u3066\u306e\u540d\u8a5e\u306b\u30cf\u30a4\u30e9\u30a4\u30c8\u3092\u4ed8\u3051\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>\u91cd\u8907\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\uff1a<\/strong>&#8220;\u30a2\u30a4\u30c6\u30e0&#8221;\u3068&#8221;\u88fd\u54c1&#8221;\u304c\u540c\u3058\u6982\u5ff5\u3092\u6307\u3059\u5834\u5408\u3001\u305d\u308c\u3089\u3092\u5225\u3005\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u3057\u3066\u6271\u308f\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>\u95a2\u9023\u95a2\u4fc2\u3092\u78ba\u8a8d\u3059\u308b\uff1a<\/strong>\u4e00\u90e8\u306e\u540d\u8a5e\u306f\u4ed6\u306e\u540d\u8a5e\u306e\u5c5e\u6027\u3067\u3042\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002&#8221;\u4f4f\u6240&#8221;\u306f\u901a\u5e38\u3001&#8221;\u9867\u5ba2&#8221;\u306e\u5c5e\u6027\u3067\u3042\u308a\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u9867\u5ba2\u3054\u3068\u306b\u8907\u6570\u306e\u4f4f\u6240\u3092\u8ffd\u8de1\u3057\u306a\u3044\u9650\u308a\u3001\u5225\u3005\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n<h3>1.2 \u5c5e\u6027\u306e\u5b9a\u7fa9<\/h3>\n<p>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u78ba\u7acb\u3055\u308c\u305f\u3089\u3001\u305d\u308c\u3089\u3092\u8a18\u8ff0\u3059\u308b\u30c7\u30fc\u30bf\u30dd\u30a4\u30f3\u30c8\u3092\u5b9a\u7fa9\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u5c5e\u6027\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u8b58\u5225\u3057\u8a18\u8ff0\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u8a73\u7d30\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u4e3b\u30ad\u30fc\uff1a<\/strong>\u5404\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u4e00\u610f\u306e\u8b58\u5225\u5b50\u3092\u7279\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u306f\u30c7\u30fc\u30bf\u6574\u5408\u6027\u306b\u3068\u3063\u3066\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002<\/li>\n<li><strong>\u8a18\u8ff0\u7684\u5c5e\u6027\uff1a<\/strong>\u540d\u524d\u3001\u65e5\u4ed8\u3001\u307e\u305f\u306f\u8aac\u660e\u306a\u3069\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u30ea\u30b9\u30c8\u30a2\u30c3\u30d7\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>\u8a08\u7b97\u5c5e\u6027\uff1a<\/strong>\u5c0e\u51fa\u304c\u5fc5\u8981\u306a\u5024\u3092\u30e1\u30e2\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u305f\u3060\u3057\u3001\u3053\u308c\u3089\u306f\u901a\u5e38\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u3067\u51e6\u7406\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u306e\u30eb\u30fc\u30eb\u3092\u8003\u616e\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<em>&#8220;\u5b66\u751f\u306f\u30b3\u30fc\u30b9\u306b\u767b\u9332\u3057\u3001\u6210\u7e3e\u3092\u53d7\u3051\u53d6\u308b\u3002&#8221;<\/em><\/p>\n<ul>\n<li><strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\uff1a<\/strong>\u5b66\u751f\u3001\u30b3\u30fc\u30b9\u3001\u5c65\u4fee\u767b\u9332\u3002<\/li>\n<li><strong>\u5c5e\u6027\uff1a<\/strong>\u5b66\u751fID\u3001\u6c0f\u540d\u3001\u30b3\u30fc\u30b9ID\u3001\u30bf\u30a4\u30c8\u30eb\u3001\u6210\u7e3e\u3001\u767b\u9332\u65e5\u3002<\/li>\n<\/ul>\n<p>\u6b21\u306e\u70b9\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<em>\u6210\u7e3e<\/em>\u306f<em>\u5b66\u751f<\/em>\u307e\u305f\u306f<em>\u30b3\u30fc\u30b9<\/em>\u5358\u72ec\u3067\u306f\u5c5e\u6027\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305d\u308c\u306f\u305d\u308c\u3089\u306e\u9593\u306e\u95a2\u4fc2\u306b\u56fa\u6709\u3067\u3059\u3002\u3053\u306e\u8a8d\u8b58\u306f\u3001\u3057\u3070\u3057\u3070\u95a2\u9023\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u4f5c\u6210\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n<h2>\u30b9\u30c6\u30c3\u30d72\uff1a\u95a2\u4fc2\u3068\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u306e\u30de\u30c3\u30d4\u30f3\u30b0 \ud83d\udd17<\/h2>\n<p>\u95a2\u4fc2\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u3069\u306e\u3088\u3046\u306b\u4e92\u3044\u306b\u76f8\u4e92\u4f5c\u7528\u3059\u308b\u304b\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u306b\u304a\u3051\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u306f\u3001\u95a2\u4fc2\u304c\u660e\u78ba\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3084\u3001\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u304c\u8aa4\u89e3\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3067\u3059\u3002\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\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\u3001\u307e\u305f\u306f\u95a2\u9023\u4ed8\u3051\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u6570\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<h3>2.1 \u95a2\u4fc2\u306e\u7279\u5b9a<\/h3>\n<p>\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u4e2d\u306e\u52d5\u8a5e\u3092\u63a2\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u52d5\u8a5e\u306f\u3057\u3070\u3057\u3070\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u793a\u3057\u307e\u3059\u3002\u4e00\u822c\u7684\u306a\u52d5\u8a5e\u306b\u306f<em>\u5272\u308a\u5f53\u3066\u308b<\/em>, <em>\u542b\u3080<\/em>, <em>\u96c7\u7528\u3059\u308b<\/em>\u3001\u307e\u305f\u306f<em>\u8cfc\u5165\u3059\u308b<\/em>.<\/p>\n<ul>\n<li><strong>\u4e00\u3064\u5bfe\u4e00\u3064 (1:1):<\/strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3 A \u306e\u4e00\u3064\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3 B \u306e\u3061\u3087\u3046\u3069\u4e00\u3064\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u95a2\u9023\u3057\u307e\u3059\u3002\u4f8b\uff1a\u5f93\u696d\u54e1\u306f\u3061\u3087\u3046\u3069\u4e00\u3064\u30d0\u30c3\u30b8\u3092\u6301\u3061\u307e\u3059\u3002<\/li>\n<li><strong>\u4e00\u3064\u5bfe\u591a\u6570 (1:N):<\/strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3 A \u306e\u4e00\u3064\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3 B \u306e\u591a\u6570\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u95a2\u9023\u3057\u307e\u3059\u3002\u4f8b\uff1a\u90e8\u7f72\u306f\u591a\u6570\u306e\u5f93\u696d\u54e1\u3092\u96c7\u7528\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u591a\u6570\u5bfe\u591a\u6570 (M:N):<\/strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3 A \u306e\u591a\u6570\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3 B \u306e\u591a\u6570\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u95a2\u9023\u3057\u307e\u3059\u3002\u4f8b\uff1a\u5b66\u751f\u306f\u591a\u6570\u306e\u30b3\u30fc\u30b9\u306b\u767b\u9332\u3057\u3001\u30b3\u30fc\u30b9\u306f\u591a\u6570\u306e\u5b66\u751f\u3092\u6709\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3>2.2 \u591a\u6570\u5bfe\u591a\u6570\u306e\u95a2\u4fc2\u306e\u51e6\u7406<\/h3>\n<p>\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306b\u304a\u3044\u3066\u3001\u76f4\u63a5\u306e\u591a\u6570\u5bfe\u591a\u6570\u306e\u95a2\u4fc2\u306f\u7269\u7406\u7684\u306b\u5b9f\u73fe\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u3001\u95a2\u9023\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\uff08\u30b8\u30e7\u30a4\u30f3\u30c8\u30c6\u30fc\u30d6\u30eb\u307e\u305f\u306f\u30d6\u30ea\u30c3\u30b8\u30c6\u30fc\u30d6\u30eb\u3068\u3082\u547c\u3070\u308c\u308b\uff09\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u89e3\u6c7a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u304c\u300c<em>\u90e8\u54c1\u306f\u591a\u6570\u306e\u30a2\u30bb\u30f3\u30d6\u30ea\u3067\u4f7f\u7528\u3055\u308c\u3001\u30a2\u30bb\u30f3\u30d6\u30ea\u306f\u591a\u6570\u306e\u90e8\u54c1\u3092\u542b\u3080\u201d<\/em>\u300d\u306e\u5834\u5408\u3001\u5909\u63db\u306b\u306f\u65b0\u3057\u3044\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u5fc5\u8981\u3067\u3059\u3002\u4f8b\u3048\u3070\u300c<em>Assembly_Part_Usage<\/em>\u300d\u3067\u3059\u3002\u3053\u306e\u65b0\u3057\u3044\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u3001\u300c<em>Part<\/em>\u300d\u304a\u3088\u3073\u300c<em>Assembly<\/em>\u300d\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304b\u3089\u306e\u5916\u90e8\u30ad\u30fc\u3001\u304a\u3088\u3073\u6570\u91cf\u306e\u3088\u3046\u306a\u305d\u306e\u95a2\u4fc2\u306b\u56fa\u6709\u306e\u5c5e\u6027\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002<\/p>\n<h3>2.3 \u4efb\u610f\u6027\u306e\u6c7a\u5b9a<\/h3>\n<p>\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u306f\u5358\u306b\u6570\u91cf\u306b\u95a2\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u5fc5\u8981\u6027\u306b\u3064\u3044\u3066\u3082\u3067\u3059\u3002\u305d\u306e\u95a2\u4fc2\u306f\u4e00\u81f4\u3092\u5fc5\u8981\u3068\u3057\u307e\u3059\u304b\uff1f<\/p>\n<ul>\n<li><strong>\u5fc5\u9808:<\/strong>\u95a2\u4fc2\u306f\u5b58\u5728\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u4f8b\uff1a\u6ce8\u6587\u306b\u306f\u9867\u5ba2\u304c\u5fc5\u9808\u3067\u3059\u3002<\/li>\n<li><strong>\u4efb\u610f:<\/strong>\u95a2\u4fc2\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u306f\u4efb\u610f\u3067\u3059\u3002\u4f8b\uff1a\u9867\u5ba2\u306b\u30df\u30c9\u30eb\u30cd\u30fc\u30e0\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u306f\u4efb\u610f\u3067\u3059\u3002<\/li>\n<\/ul>\n<p>\u3053\u306e\u533a\u5225\u3092\u6587\u66f8\u5316\u3059\u308b\u3053\u3068\u3067\u3001null \u5024\u30a8\u30e9\u30fc\u3092\u9632\u304e\u3001\u53c2\u7167\u6574\u5408\u6027\u5236\u7d04\u304c\u6b63\u3057\u304f\u9069\u7528\u3055\u308c\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30b9\u30c6\u30c3\u30d7 3: \u6b63\u898f\u5316\u3068\u5236\u7d04\u306e\u9069\u7528 \u2696\ufe0f<\/h2>\n<p>\u521d\u671f\u56f3\u9762\u304c\u30c9\u30e9\u30d5\u30c8\u3055\u308c\u305f\u5f8c\u3001\u30c7\u30fc\u30bf\u3092\u6d17\u7df4\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6b63\u898f\u5316\u3068\u306f\u3001\u5197\u9577\u6027\u3092\u6e1b\u3089\u3057\u6574\u5408\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b\u30c7\u30fc\u30bf\u3092\u6574\u7406\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002\u3053\u308c\u306f\u5358\u306a\u308b\u6280\u8853\u7684\u306a\u6f14\u7fd2\u3067\u306f\u306a\u304f\u3001\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306e\u52b9\u7387\u6027\u306e\u53cd\u6620\u3067\u3059\u3002<\/p>\n<h3>3.1 \u7b2c 1 \u6b63\u898f\u5f62 (1NF)<\/h3>\n<p>\u3059\u3079\u3066\u306e\u5c5e\u6027\u306f\u539f\u5b50\u5024\u3092\u542b\u3081\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u7e70\u308a\u8fd4\u3057\u30b0\u30eb\u30fc\u30d7\u306f\u3042\u3063\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u3042\u308b\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u304c\u6b21\u306e\u3088\u3046\u306b\u8ff0\u3079\u3066\u3044\u308b\u5834\u5408<em>\u300c\u9867\u5ba2\u306f\u8907\u6570\u306e\u96fb\u8a71\u756a\u53f7\u3092\u6301\u3064\u300d<\/em>\u3001\u305d\u308c\u3089\u3092\u5358\u4e00\u306e\u5217\u306b\u6b21\u306e\u3088\u3046\u306b\u4fdd\u5b58\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044<code>phone_numbers: '555-1234, 555-5678'<\/code>\u3002\u4ee3\u308f\u308a\u306b\u3001\u96fb\u8a71\u756a\u53f7\u306e\u305f\u3081\u306b\u5225\u306e\u884c\u307e\u305f\u306f\u95a2\u9023\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>3.2 \u7b2c 2 \u6b63\u898f\u5f62 (2NF)<\/h3>\n<p>\u5c5e\u6027\u306f\u4e3b\u30ad\u30fc\u306b\u5b8c\u5168\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u8907\u5408\u30ad\u30fc\u3092\u6301\u3064\u5834\u5408\u3001\u3069\u306e\u5c5e\u6027\u3082\u305d\u306e\u30ad\u30fc\u306e\u4e00\u90e8\u306e\u307f\u306b\u306f\u4f9d\u5b58\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u4f8b\u3048\u3070\u3001\u8907\u5408\u30ad\u30fc\u304c<em>Student_ID<\/em>\u3068<em>Course_ID<\/em>\u306b\u3088\u3063\u3066\u5f62\u6210\u3055\u308c\u308b\u5834\u5408\u3001<em>Student_Name<\/em>\u306e\u3088\u3046\u306a\u5c5e\u6027\u306f\u5c65\u4fee\u767b\u9332\u30c6\u30fc\u30d6\u30eb\u306b\u4fdd\u5b58\u3055\u308c\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u305d\u308c\u306f\u5b66\u751f\u30c6\u30fc\u30d6\u30eb\u306b\u5c5e\u3057\u307e\u3059\u3002<\/p>\n<h3>3.3 \u7b2c 3 \u6b63\u898f\u5f62 (3NF)<\/h3>\n<p>\u5c5e\u6027\u306f\u4ed6\u306e\u975e\u30ad\u30fc\u5c5e\u6027\u304b\u3089\u72ec\u7acb\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u63a8\u79fb\u7684\u4f9d\u5b58\u6027\u304c\u6392\u9664\u3055\u308c\u307e\u3059\u3002\u3082\u3057<em>City<\/em>\u304c<em>Zip_Code<\/em>\u306b\u4f9d\u5b58\u3057\u3001<em>Zip_Code<\/em>\u304c<em>Address<\/em>\u306e\u5c5e\u6027\u3067\u3042\u308b\u5834\u5408\u3001<em>City<\/em>\u306f\u7406\u60f3\u7684\u306b\u306f Address \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u307e\u305f\u306f\u30ea\u30f3\u30af\u3055\u308c\u305f Zip_Code \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u4fdd\u5b58\u3055\u308c\u3001\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u91cd\u8907\u3057\u3066\u4fdd\u5b58\u3055\u308c\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002<\/p>\n<h2>\u30b9\u30c6\u30c3\u30d7 4: \u30eb\u30fc\u30eb\u306b\u5bfe\u3059\u308b\u30e2\u30c7\u30eb\u306e\u691c\u8a3c \u2705<\/h2>\n<p>\u56f3\u304c\u69cb\u7bc9\u3055\u308c\u305f\u5f8c\u3001\u691c\u8a3c\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30d5\u30a7\u30fc\u30ba\u3067\u306f\u3001\u6280\u8853\u30e2\u30c7\u30eb\u304c\u5143\u306e\u30d3\u30b8\u30cd\u30b9\u8981\u4ef6\u304b\u3089\u9038\u8131\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u306f\u3053\u306e\u691c\u8a3c\u306b\u52b9\u679c\u7684\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u30bf\u30a4\u30d7<\/th>\n<th>ERD\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/th>\n<th>\u691c\u8a3c\u30c1\u30a7\u30c3\u30af<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u4e00\u610f\u6027\u5236\u7d04<\/td>\n<td>\u4e3b\u30ad\u30fc \/ \u4e00\u610f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/td>\n<td>\u3059\u3079\u3066\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u4e00\u610f\u306b\u8b58\u5225\u53ef\u80fd\u304b\uff1f<\/td>\n<\/tr>\n<tr>\n<td>\u5fc5\u9808\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7<\/td>\n<td>NOT NULL\u5236\u7d04<\/td>\n<td>\u5fc5\u8981\u306a\u5834\u6240\u306b\u5916\u90e8\u30ad\u30fc\u306f\u5fc5\u8981\u304b\uff1f<\/td>\n<\/tr>\n<tr>\n<td>\u30c7\u30fc\u30bf\u7bc4\u56f2<\/td>\n<td>\u30c1\u30a7\u30c3\u30af\u5236\u7d04 \/ \u30c7\u30fc\u30bf\u578b<\/td>\n<td>\u6570\u5024\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u671f\u5f85\u3055\u308c\u308b\u30d3\u30b8\u30cd\u30b9\u5236\u9650\u3068\u4e00\u81f4\u3057\u3066\u3044\u308b\u304b\uff1f<\/td>\n<\/tr>\n<tr>\n<td>\u8907\u6570\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7<\/td>\n<td>\u95a2\u9023\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3<\/td>\n<td>M:N\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u306f1:N\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u306b\u89e3\u6c7a\u3055\u308c\u3066\u3044\u308b\u304b\uff1f<\/td>\n<\/tr>\n<tr>\n<td>\u5c65\u6b74\u30c7\u30fc\u30bf<\/td>\n<td>\u6642\u9593\u7684\u5c5e\u6027<\/td>\n<td>\u5909\u66f4\u306e\u8ffd\u8de1\u306b\u6709\u52b9\u65e5\u4ed8\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\uff1f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u3053\u306e\u8868\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u30ae\u30e3\u30c3\u30d7\u3092\u7279\u5b9a\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30eb\u30fc\u30eb\u304c\u300c<em>\u4fa1\u683c\u306f\u8ca0\u306e\u5024\u306b\u3067\u304d\u306a\u3044\u300d<\/em>\u300d\u3068\u8ff0\u3079\u3066\u3044\u308b\u5834\u5408\u3001\u691c\u8a3c\u30c1\u30a7\u30c3\u30af\u306f\u30c7\u30fc\u30bf\u578b\u3068\u5236\u7d04\u304c\u3053\u306e\u3053\u3068\u3092\u9632\u3050\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u30eb\u30fc\u30eb\u304c\u300c<em>\u88fd\u54c1\u306f\u30ab\u30c6\u30b4\u30ea\u306b\u5c5e\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u300d<\/em>\u300d\u3068\u8ff0\u3079\u3066\u3044\u308b\u5834\u5408\u3001\u691c\u8a3c\u30c1\u30a7\u30c3\u30af\u306f\u5916\u90e8\u30ad\u30fc\u304cNULL\u3067\u306a\u3044\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002<\/p>\n<h2>\u7ffb\u8a33\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74 \ud83d\udea7<\/h2>\n<p>\u7d4c\u9a13\u8c4a\u5bcc\u306a\u30e2\u30c7\u30e9\u30fc\u3067\u3082\u3001\u7e70\u308a\u8fd4\u3057\u767a\u751f\u3059\u308b\u554f\u984c\u306b\u76f4\u9762\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74\u306b\u6c17\u3065\u304f\u3053\u3068\u3067\u3001\u958b\u767a\u30d5\u30a7\u30fc\u30ba\u3067\u591a\u304f\u306e\u6642\u9593\u3092\u7bc0\u7d04\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u904e\u5270\u306a\u6b63\u898f\u5316\uff1a<\/strong>\u30c6\u30fc\u30d6\u30eb\u3092\u7d30\u5206\u5316\u3057\u3059\u304e\u308b\u3068\u3001\u7d50\u5408\u304c\u904e\u5270\u306b\u306a\u308a\u3001\u30af\u30a8\u30ea\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3057\u307e\u3059\u3002\u6574\u5408\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u8981\u4ef6\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>\u5c5e\u6027\u306e\u4e0d\u8db3\uff1a<\/strong>\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u306b\u7126\u70b9\u3092\u5f53\u3066\u3059\u304e\u3066\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u5fc5\u8981\u306a\u8a18\u8ff0\u30c7\u30fc\u30bf\u3092\u5fd8\u308c\u308b\u3053\u3068\u3002<\/li>\n<li><strong>1:1 \u95a2\u4fc2\u3092\u524d\u63d0\u3068\u3059\u308b\u3053\u3068\uff1a<\/strong>\u8ad6\u7406\u7684\u306a\u5206\u96e2\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u305f\u3081\u306b\u5225\u30c6\u30fc\u30d6\u30eb\u3067\u3042\u308b\u3079\u304d 1:1 \u95a2\u4fc2\u3092\u5358\u4e00\u306e\u30c6\u30fc\u30d6\u30eb\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u3002<\/li>\n<li><strong>\u30bd\u30d5\u30c8\u30c7\u30ea\u30fc\u30c8\u3092\u7121\u8996\u3059\u308b\u3053\u3068\uff1a<\/strong>\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u3067\u306f\u3001\u975e\u30a2\u30af\u30c6\u30a3\u30d6\u3068\u30de\u30fc\u30af\u3055\u308c\u3066\u3044\u3066\u3082\u5c65\u6b74\u306e\u305f\u3081\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u304c\u591a\u3044\u3002\u30e2\u30c7\u30eb\u306f\u300c<code>is_active<\/code>\u30d5\u30e9\u30b0\u307e\u305f\u306f\u5225\u306e\u30a2\u30fc\u30ab\u30a4\u30d6\u30c6\u30fc\u30d6\u30eb\u3092\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/li>\n<li><strong>\u5c5e\u6027\u3068\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u6df7\u540c\u3059\u308b\u3053\u3068\uff1a<\/strong>\u30c9\u30e1\u30a4\u30f3\u5236\u7d04\u307e\u305f\u306f\u5217\u6319\u578b\u5024\u3067\u3042\u308b\u3079\u304d\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u30ea\u30b9\u30c8\uff08\u4f8b\uff1a\u300c\u30b9\u30c6\u30fc\u30bf\u30b9\u300d\uff09\u3092\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u3002<\/li>\n<\/ul>\n<h2>\u30b9\u30c6\u30c3\u30d7 5\uff1a\u53cd\u5fa9\u3068\u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3 \ud83d\udcdd<\/h2>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306f\u7dda\u5f62\u30d7\u30ed\u30bb\u30b9\u3067\u3042\u308b\u3053\u3068\u306f\u3081\u3063\u305f\u306b\u3042\u308a\u307e\u305b\u3093\u3002\u8981\u4ef6\u306f\u9032\u5316\u3057\u3001\u521d\u671f\u30e2\u30c7\u30eb\u306f\u8abf\u6574\u3092\u5fc5\u8981\u3068\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u306f\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002\u305d\u308c\u306f\u6280\u8853\u30c1\u30fc\u30e0\u3068\u30d3\u30b8\u30cd\u30b9\u95a2\u4fc2\u8005\u306e\u9593\u306e\u67b6\u3051\u6a4b\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002<\/p>\n<h3>5.1 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