{"id":75,"date":"2026-04-05T04:46:54","date_gmt":"2026-04-05T04:46:54","guid":{"rendered":"https:\/\/www.we-notes.com\/ja\/er-diagrams-mapping-business-rules-to-schemas\/"},"modified":"2026-04-05T04:46:54","modified_gmt":"2026-04-05T04:46:54","slug":"er-diagrams-mapping-business-rules-to-schemas","status":"publish","type":"post","link":"https:\/\/www.we-notes.com\/ja\/er-diagrams-mapping-business-rules-to-schemas\/","title":{"rendered":"ER\u56f3\u306e\u8a73\u7d30\u306a\u89e3\u8aac\uff1a\u73fe\u5b9f\u4e16\u754c\u306e\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u3092\u6280\u8853\u7684\u30b9\u30ad\u30fc\u30de\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3059\u308b"},"content":{"rendered":"<p>\u30c7\u30fc\u30bf\u306f\u3001\u3042\u3089\u3086\u308b\u73fe\u4ee3\u306e\u60c5\u5831\u30b7\u30b9\u30c6\u30e0\u306e\u57fa\u76e4\u3092\u6210\u3059\u3002\u3057\u304b\u3057\u3001\u69cb\u9020\u306e\u306a\u3044\u30c7\u30fc\u30bf\u306f\u5358\u306a\u308b\u30ce\u30a4\u30ba\u306b\u3059\u304e\u306a\u3044\u3002\u539f\u59cb\u7684\u306a\u60c5\u5831\u3092\u5b9f\u884c\u53ef\u80fd\u306a\u77e5\u6027\u306b\u5909\u63db\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u69cb\u9020\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306b\u4f9d\u5b58\u3059\u308b\u3002\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u306f\u3001\u3053\u3046\u3057\u305f\u69cb\u9020\u306e\u5efa\u7bc9\u56f3\u3068\u3057\u3066\u6a5f\u80fd\u3059\u308b\u3002\u62bd\u8c61\u7684\u306a\u30d3\u30b8\u30cd\u30b9\u8981\u4ef6\u3068\u5177\u4f53\u7684\u306a\u6280\u8853\u7684\u5b9f\u88c5\u306e\u9593\u306e\u30ae\u30e3\u30c3\u30d7\u3092\u57cb\u3081\u308b\u5f79\u5272\u3092\u679c\u305f\u3059\u3002\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u30e1\u30ab\u30cb\u30ba\u30e0\u306b\u7126\u70b9\u3092\u5f53\u3066\u3001\u904b\u7528\u8ad6\u7406\u3092\u30b9\u30ad\u30fc\u30de\u5b9a\u7fa9\u306b\u6b63\u78ba\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\u3059\u308b\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Hand-drawn infographic explaining Entity-Relationship Diagrams: visual guide to core components (entities, attributes, relationships), cardinality types (1:1, 1:N, M:N) with notation examples, business rule translation workflow from natural language to database schema, and normalization principles (1NF, 2NF, 3NF) - thick outline sketch style, educational data modeling reference\" decoding=\"async\" src=\"https:\/\/www.we-notes.com\/wp-content\/uploads\/2026\/04\/er-diagrams-business-rules-to-schema-infographic-hand-drawn.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83c\udfd7\ufe0f \u30b3\u30a2\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u7406\u89e3<\/h2>\n<p>ER\u56f3\u306f\u3001\u4e09\u3064\u306e\u57fa\u672c\u7684\u306a\u69cb\u6210\u8981\u7d20\u3067\u69cb\u6210\u3055\u308c\u308b\u3002\u5404\u69cb\u6210\u8981\u7d20\u306f\u3001\u30c7\u30fc\u30bf\u306e\u683c\u7d0d\u304a\u3088\u3073\u95a2\u9023\u4ed8\u3051\u65b9\u306e\u7279\u5b9a\u306e\u5074\u9762\u3092\u8868\u3059\u3002\u3053\u308c\u3089\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u7fd2\u5f97\u3059\u308b\u3053\u3068\u3067\u3001\u7d44\u7e54\u306e\u30cb\u30fc\u30ba\u306b\u5408\u81f4\u3057\u305f\u5805\u7262\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u7bc9\u304c\u53ef\u80fd\u306b\u306a\u308b\u3002<\/p>\n<ul>\n<li><strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\uff1a<\/strong> \u3053\u308c\u3089\u306f\u3001\u30c7\u30fc\u30bf\u304c\u53ce\u96c6\u3055\u308c\u308b\u5bfe\u8c61\u3084\u6982\u5ff5\u3092\u8868\u3059\u3002\u30d3\u30b8\u30cd\u30b9\u306e\u6587\u8108\u3067\u306f\u3001\u3053\u308c\u3089\u306f\u300c<em>\u9867\u5ba2<\/em>, <em>\u6ce8\u6587<\/em>\u300d\u3084\u300c<em>\u88fd\u54c1<\/em>\u300d\u306a\u3069\u3001\u540d\u8a5e\u3068\u3057\u3066\u73fe\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3002\u30b9\u30ad\u30fc\u30de\u3067\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u30c6\u30fc\u30d6\u30eb\u306b\u306a\u308b\u3002<\/li>\n<li><strong>\u5c5e\u6027\uff1a<\/strong> \u3053\u308c\u3089\u306f\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u7279\u6027\u3092\u8a18\u8ff0\u3059\u308b\u3002\u4f8b\u3068\u3057\u3066\u300c<em>\u540d\u524d<\/em>, <em>\u4fa1\u683c<\/em>\u300d\u3084\u300c<em>\u65e5\u4ed8<\/em>\u300d\u306a\u3069\u304c\u3042\u308b\u3002\u5c5e\u6027\u306f\u3001\u5bfe\u5fdc\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u5185\u306e\u5217\u306b\u306a\u308b\u3002<\/li>\n<li><strong>\u95a2\u4fc2\uff1a<\/strong> \u3053\u308c\u3089\u306f\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u9023\u3092\u5b9a\u7fa9\u3059\u308b\u3002\u95a2\u4fc2\u306f\u3001\u3042\u308b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u5225\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u3069\u306e\u3088\u3046\u306b\u7d50\u3073\u3064\u3044\u3066\u3044\u308b\u304b\u3092\u793a\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306f\u3001\u95a2\u4fc2\u306f\u3057\u3070\u3057\u3070\u30ad\u30fc\u306b\u3088\u3063\u3066\u5f37\u5236\u3055\u308c\u308b\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udd04 \u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u3092\u30b9\u30ad\u30fc\u30de\u8981\u7d20\u306b\u5909\u63db\u3059\u308b<\/h2>\n<p>\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u306b\u304a\u3044\u3066\u6700\u3082\u91cd\u8981\u306a\u30b9\u30c6\u30c3\u30d7\u306f\u3001\u5909\u63db\u30d5\u30a7\u30fc\u30ba\u3067\u3042\u308b\u3002\u30d3\u30b8\u30cd\u30b9\u95a2\u4fc2\u8005\u306f\u30d7\u30ed\u30bb\u30b9\u3084\u30dd\u30ea\u30b7\u30fc\u306e\u89b3\u70b9\u3067\u8a71\u3059\u3002\u30a8\u30f3\u30b8\u30cb\u30a2\u306f\u30c6\u30fc\u30d6\u30eb\u3084\u5236\u7d04\u306e\u89b3\u70b9\u3067\u8a71\u3059\u3002\u30e2\u30c7\u30e9\u30fc\u306f\u3001\u3053\u306e\u4e8c\u3064\u306e\u8a00\u8a9e\u306e\u9593\u306e\u901a\u8a33\u8005\u3068\u3057\u3066\u6a5f\u80fd\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/p>\n<p>\u6b21\u306e\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u3092\u8003\u3048\u3066\u307f\u3088\u3046\uff1a<em>\u300c1\u4eba\u306e\u5f93\u696d\u54e1\u304c\u8907\u6570\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u7ba1\u7406\u3067\u304d\u308b\u304c\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u306f\u5c11\u306a\u304f\u3068\u30821\u4eba\u306e\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u304c\u5fc5\u9808\u3067\u3042\u308b\u3002\u300d<\/em>\u3053\u306e\u30eb\u30fc\u30eb\u306f\u3001\u3069\u306e\u3088\u3046\u306b\u30b9\u30ad\u30fc\u30de\u306b\u306a\u308b\u306e\u304b\uff1f<\/p>\n<ul>\n<li><strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u7279\u5b9a\u3059\u308b\uff1a<\/strong> <em>\u5f93\u696d\u54e1<\/em> \u304a\u3088\u3073 <em>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/em>.<\/li>\n<li><strong>\u95a2\u4fc2\u3092\u7279\u5b9a\u3059\u308b\uff1a<\/strong> <em>\u7ba1\u7406\u3059\u308b<\/em>.<\/li>\n<li><strong>\u57fa\u6570\u3092\u5b9a\u7fa9\u3059\u308b\uff1a<\/strong>1\u4eba\u306e\u5f93\u696d\u54e1\u304c\u8907\u6570\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u7ba1\u7406\u3059\u308b\uff081:N\uff09\u30021\u3064\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306f\u5c11\u306a\u304f\u3068\u30821\u4eba\u306e\u5f93\u696d\u54e1\u306b\u7d10\u3065\u304f\uff08\u89e3\u91c8\u306b\u3088\u308a1:1\u307e\u305f\u306f1:N\uff09\u3002<\/li>\n<li><strong>\u30aa\u30d7\u30b7\u30e7\u30ca\u30ea\u30c6\u30a3\u3092\u5f37\u5236\u3059\u308b\uff1a<\/strong> \u30d7\u30ed\u30b8\u30a7\u30af\u30c8 <em>\u306f<\/em>\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u3092\u6301\u305f\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u3053\u308c\u306f\u5916\u90e8\u30ad\u30fc\u306b<strong>NOT NULL<\/strong>\u5236\u7d04\u3092\u8ab2\u3059\u3053\u3068\u306b\u306a\u308b\u3002<\/li>\n<\/ul>\n<p>\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u3067\u306f\u3001\u30d3\u30b8\u30cd\u30b9\u30e6\u30fc\u30b6\u30fc\u304c\u63d0\u4f9b\u3059\u308b\u81ea\u7136\u8a00\u8a9e\u3092\u614e\u91cd\u306b\u5206\u6790\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u66d6\u6627\u3055\u306f\u30c7\u30fc\u30bf\u6574\u5408\u6027\u306e\u6575\u3067\u3042\u308b\u3002\u30eb\u30fc\u30eb\u304c\u300c\u9867\u5ba2\u306f\u6ce8\u6587\u3092\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u300d\u3068\u8ff0\u3079\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u308c\u306f\u9867\u5ba2\u304c\u6ce8\u6587\u3092\u30bc\u30ed\u4ef6\u3082\u53ef\u80fd\u3067\u3042\u308b\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u306e\u304b\u3001\u305d\u308c\u3068\u3082\u6700\u4f4e1\u4ef6\u306f\u6ce8\u6587\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u306e\u304b\u3002\u3053\u306e\u9055\u3044\u306f\u5916\u90e8\u30ad\u30fc\u306e\u5b9f\u88c5\u306b\u5f71\u97ff\u3059\u308b\u3002<em>\u300c\u9867\u5ba2\u306f\u6ce8\u6587\u3092\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u300d<\/em>\u3001\u305d\u308c\u306f\u5f7c\u3089\u304c<em>\u306f<\/em>\u30bc\u30ed\u4ef6\u306e\u6ce8\u6587\u3092\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u304b\u3001\u305d\u308c\u3068\u3082\u6700\u4f4e1\u4ef6\u306f\u6ce8\u6587\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u306e\u304b\u3002\u3053\u306e\u9055\u3044\u306f\u5916\u90e8\u30ad\u30fc\u306e\u5b9f\u88c5\u3092\u5909\u3048\u308b\u3002<\/p>\n<h2>\ud83d\udccf \u57fa\u6570\u3068\u30aa\u30d7\u30b7\u30e7\u30ca\u30ea\u30c6\u30a3<\/h2>\n<p>\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\u5404\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u95a2\u9023\u4ed8\u3051\u3089\u308c\u308b\u6570\uff08\u53ef\u80fd\u307e\u305f\u306f\u5fc5\u9808\uff09\u3092\u5b9a\u7fa9\u3059\u308b\u3002\u3053\u308c\u306f\u95a2\u4fc2\u306e\u6570\u5b66\u7684\u57fa\u76e4\u3067\u3042\u308b\u3002<\/p>\n<h3>1\u5bfe1\uff081:1\uff09<\/h3>\n<p>1\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u306e1\u3064\u306e\u30ec\u30b3\u30fc\u30c9\u304c\u3001\u5225\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u6b63\u78ba\u306b1\u3064\u306e\u30ec\u30b3\u30fc\u30c9\u3068\u95a2\u9023\u3059\u308b\u5834\u5408\u306b\u767a\u751f\u3059\u308b\u3002\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3084\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u7406\u7531\u3067\u30c6\u30fc\u30d6\u30eb\u3092\u5206\u5272\u3059\u308b\u5834\u5408\u306b\u4e00\u822c\u7684\u3060\u304c\u3001\u4e00\u822c\u7684\u306a\u30d3\u30b8\u30cd\u30b9\u8ad6\u7406\u3067\u306f\u305d\u308c\u307b\u3069\u983b\u7e41\u3067\u306f\u306a\u3044\u3002<\/p>\n<ul>\n<li><em>\u4f8b\uff1a<\/em> 1\u4eba\u306e\u4eba\u7269\u306f1\u3064\u306e\u30d1\u30b9\u30dd\u30fc\u30c8\u3092\u6301\u3064\u30021\u3064\u306e\u30d1\u30b9\u30dd\u30fc\u30c8\u306f1\u4eba\u306e\u4eba\u7269\u306b\u5c5e\u3059\u308b\u3002<\/li>\n<li><em>\u5b9f\u88c5\uff1a<\/em> \u3069\u3061\u3089\u304b\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5916\u90e8\u30ad\u30fc\u3092\u8a2d\u3051\u3001\u3082\u3046\u4e00\u65b9\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u4e3b\u30ad\u30fc\u3092\u53c2\u7167\u3059\u308b\u3002<\/li>\n<\/ul>\n<h3>1\u5bfe\u591a\uff081:N\uff09<\/h3>\n<p>\u3053\u308c\u306f\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u6700\u3082\u4e00\u822c\u7684\u306a\u95a2\u4fc2\u30bf\u30a4\u30d7\u3067\u3042\u308b\u3002Table A\u306e1\u3064\u306e\u30ec\u30b3\u30fc\u30c9\u304c\u3001Table B\u306e\u8907\u6570\u306e\u30ec\u30b3\u30fc\u30c9\u306b\u95a2\u9023\u3059\u308b\u3002Table B\u304c\u5916\u90e8\u30ad\u30fc\u3092\u4fdd\u6301\u3059\u308b\u3002<\/p>\n<ul>\n<li><em>\u4f8b\uff1a<\/em> \u90e8\u9580\u306b\u306f\u591a\u304f\u306e\u5f93\u696d\u54e1\u304c\u3044\u308b\u3002\u5f93\u696d\u54e1\u306f1\u3064\u306e\u90e8\u9580\u306b\u6240\u5c5e\u3059\u308b\u3002<\/li>\n<li><em>\u5b9f\u88c5:<\/em> \u306e <em>\u5f93\u696d\u54e1<\/em> \u30c6\u30fc\u30d6\u30eb\u306b\u306f <em>\u90e8\u9580ID<\/em> \u5217\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3>\u591a\u5bfe\u591a\uff08M:N\uff09<\/h3>\n<p>\u30c6\u30fc\u30d6\u30ebA\u306e2\u3064\u306e\u30ec\u30b3\u30fc\u30c9\u304c\u30c6\u30fc\u30d6\u30ebB\u306e\u8907\u6570\u306e\u30ec\u30b3\u30fc\u30c9\u306b\u95a2\u9023\u3057\u3001\u305d\u306e\u9006\u3082\u6210\u308a\u7acb\u3064\u3002\u3053\u306e\u95a2\u4fc2\u3092\u6a19\u6e96\u7684\u306a\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30b9\u30ad\u30fc\u30de\u3067\u76f4\u63a5\u5b9f\u88c5\u3059\u308b\u3053\u3068\u306f\u3001\u4e2d\u9593\u30b9\u30c6\u30c3\u30d7\u3092\u7d4c\u306a\u3044\u9650\u308a\u4e0d\u53ef\u80fd\u3067\u3042\u308b\u3002<\/p>\n<ul>\n<li><em>\u4f8b:<\/em> \u5b66\u751f\u304c\u6388\u696d\u306b\u767b\u9332\u3059\u308b\u30021\u4eba\u306e\u5b66\u751f\u306f\u8907\u6570\u306e\u6388\u696d\u3092\u53d7\u3051\u308b\u30021\u3064\u306e\u6388\u696d\u306b\u306f\u8907\u6570\u306e\u5b66\u751f\u304c\u3044\u308b\u3002<\/li>\n<li><em>\u5b9f\u88c5:<\/em> \u89aa\u30c6\u30fc\u30d6\u30eb\u53cc\u65b9\u306e\u5916\u90e8\u30ad\u30fc\u3092\u542b\u3080\u7d50\u5408\u30c6\u30fc\u30d6\u30eb\uff08\u95a2\u9023\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\uff09\u3092\u4f5c\u6210\u3059\u308b\u3002<\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th>\u95a2\u4fc2\u306e\u7a2e\u985e<\/th>\n<th>\u8996\u899a\u7684\u8868\u8a18\uff08\u6982\u5ff5\uff09<\/th>\n<th>\u30b9\u30ad\u30fc\u30de\u306e\u5b9f\u88c5<\/th>\n<th>\u4e00\u822c\u7684\u306a\u4f7f\u7528\u4f8b<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1\u5bfe1\uff081:1\uff09<\/td>\n<td>|\u2014|<\/td>\n<td>\u3044\u305a\u308c\u304b\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5916\u90e8\u30ad\u30fc<\/td>\n<td>\u500b\u4eba \u2194 \u30d1\u30b9\u30dd\u30fc\u30c8<\/td>\n<\/tr>\n<tr>\n<td>1\u5bfe\u591a\uff081:N\uff09<\/td>\n<td>|\u2014&lt;&lt;&lt;<\/td>\n<td>\u300c\u591a\u300d\u5074\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5916\u90e8\u30ad\u30fc<\/td>\n<td>\u90e8\u9580 \u2194 \u5f93\u696d\u54e1<\/td>\n<\/tr>\n<tr>\n<td>\u591a\u5bfe\u591a\uff08M:N\uff09<\/td>\n<td>&lt;&lt;&lt;\u2014&lt;&lt;&lt;<\/td>\n<td>2\u3064\u306e\u5916\u90e8\u30ad\u30fc\u3092\u6301\u3064\u7d50\u5408\u30c6\u30fc\u30d6\u30eb<\/td>\n<td>\u5b66\u751f \u2194 \u6388\u696d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83e\udde9 \u6b63\u898f\u5316\u306e\u539f\u5247<\/h2>\n<p>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u95a2\u4fc2\u304c\u5b9a\u7fa9\u3055\u308c\u308b\u3068\u3001\u30b9\u30ad\u30fc\u30de\u306f\u6b63\u898f\u5316\u3055\u308c\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u6b63\u898f\u5316\u3068\u306f\u3001\u30c7\u30fc\u30bf\u306e\u5197\u9577\u6027\u3092\u6e1b\u3089\u3057\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u30c7\u30fc\u30bf\u3092\u4f53\u7cfb\u7684\u306b\u6574\u7406\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u3042\u308b\u3002\u3053\u308c\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u3092\u3088\u308a\u5c0f\u3055\u304f\u3001\u826f\u597d\u306b\u69cb\u9020\u5316\u3055\u308c\u305f\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u5206\u89e3\u3059\u308b\u3053\u3068\u3092\u542b\u3080\u3002<\/p>\n<h3>\u7b2c\u4e00\u6b63\u898f\u5f62\uff081NF\uff09<\/h3>\n<p>\u3059\u3079\u3066\u306e\u5217\u306b\u306f\u539f\u5b50\u7684\u306a\u5024\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u30021\u3064\u306e\u30bb\u30eb\u5185\u306b\u7e70\u308a\u8fd4\u3057\u30b0\u30eb\u30fc\u30d7\u3084\u914d\u5217\u304c\u3042\u3063\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u5404\u884c\u306f\u4e00\u610f\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<ul>\n<li><em>\u9055\u53cd\uff1a<\/em> A <em>\u30b9\u30ad\u30eb<\/em> \u5217\u306b\u542b\u307e\u308c\u308b <em>\u300cSQL\u3001Python\u3001Java\u300d<\/em> 1\u3064\u306e\u30bb\u30eb\u5185\u306b\u3002<\/li>\n<li><em>\u4fee\u6b63\uff1a<\/em> \u30b9\u30ad\u30eb\u3092\u95a2\u4fc2\u306b\u3088\u3063\u3066\u30ea\u30f3\u30af\u3055\u308c\u305f\u5225\u3005\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5206\u5272\u3059\u308b\u3002<\/li>\n<\/ul>\n<h3>\u7b2c\u4e8c\u6b63\u898f\u5f62\uff082NF\uff09<\/h3>\n<p>\u30c6\u30fc\u30d6\u30eb\u306f1NF\u306b\u3042\u308a\u3001\u3059\u3079\u3066\u306e\u975e\u30ad\u30fc\u5c5e\u6027\u306f\u4e3b\u30ad\u30fc\u306b\u5b8c\u5168\u306b\u4f9d\u5b58\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u306b\u3088\u308a\u90e8\u5206\u7684\u4f9d\u5b58\u304c\u6392\u9664\u3055\u308c\u307e\u3059\u3002<\/p>\n<ul>\n<li><em>\u30b7\u30ca\u30ea\u30aa\uff1a<\/em> \u7d44\u307f\u5408\u308f\u305b\u305f\u30c6\u30fc\u30d6\u30eb <em>\u6ce8\u6587<\/em> \u3068 <em>\u6ce8\u6587\u9805\u76ee<\/em> \u3053\u3053\u3067 <em>\u88fd\u54c1\u540d<\/em> \u306f\u305f\u3060\u3061\u306b <em>\u9805\u76eeID<\/em> \u306b\u4f9d\u5b58\u3057\u3001<em>\u6ce8\u6587ID<\/em>.<\/li>\n<li><em>\u4fee\u6b63\uff1a<\/em> \u79fb\u52d5\u3059\u308b <em>\u88fd\u54c1\u540d<\/em> \u3092 <em>\u9805\u76ee<\/em> \u30c6\u30fc\u30d6\u30eb\u306b\u3002<\/li>\n<\/ul>\n<h3>\u7b2c\u4e09\u6b63\u898f\u5f62 (3NF)<\/h3>\n<p>\u30c6\u30fc\u30d6\u30eb\u306f2NF\u306b\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u3057\u3001\u63a8\u79fb\u7684\u4f9d\u5b58\u95a2\u4fc2\u304c\u3042\u3063\u3066\u306f\u306a\u3089\u306a\u3044\u3002\u975e\u30ad\u30fc\u5c5e\u6027\u306f\u4ed6\u306e\u975e\u30ad\u30fc\u5c5e\u6027\u306b\u4f9d\u5b58\u3057\u3066\u306f\u306a\u3089\u306a\u3044\u3002<\/p>\n<ul>\n<li><em>\u30b7\u30ca\u30ea\u30aa\uff1a<\/em> A <em>\u9867\u5ba2<\/em> \u30c6\u30fc\u30d6\u30eb\u306b\u306f <em>\u90fd\u5e02<\/em> \u3068 <em>\u56fd<\/em> \u304c\u3042\u308a\u3001<em>\u56fd<\/em> \u306f <em>\u90fd\u5e02<\/em>.<\/li>\n<li><em>\u4fee\u6b63\uff1a<\/em> <em>\u5834\u6240<\/em> \u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u3066\u90fd\u5e02\u3068\u56fd\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u3059\u308b\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udee1\ufe0f \u5236\u7d04\u3068\u6574\u5408\u6027\u306e\u7ba1\u7406<\/h2>\n<p>\u30b9\u30ad\u30fc\u30de\u306e\u8cea\u306f\u3001\u305d\u308c\u3092\u5b88\u308b\u30eb\u30fc\u30eb\u306e\u8cea\u306b\u4f9d\u5b58\u3059\u308b\u3002\u5236\u7d04\u306f\u3001\u30c7\u30fc\u30bf\u304c\u6642\u9593\u306e\u7d4c\u904e\u3068\u3068\u3082\u306b\u6b63\u78ba\u304b\u3064\u4e00\u8cab\u6027\u3092\u4fdd\u3064\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u3002<\/p>\n<h3>\u4e3b\u30ad\u30fc<\/h3>\n<p>\u3059\u3079\u3066\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u306f\u4e00\u610f\u306e\u8b58\u5225\u5b50\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u30012\u3064\u306e\u884c\u304c\u540c\u4e00\u306b\u306a\u308b\u3053\u3068\u3092\u9632\u304e\u3001\u6b63\u78ba\u306a\u691c\u7d22\u304c\u53ef\u80fd\u306b\u306a\u308b\u3002\u591a\u304f\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u81ea\u52d5\u5897\u5206\u6574\u6570\u304c\u4f7f\u7528\u3055\u308c\u308b\u3002\u4ed6\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001UUID\u3084\u81ea\u7136\u30ad\u30fc\u304c\u4f7f\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308b\u3002<\/p>\n<h3>\u5916\u90e8\u30ad\u30fc<\/h3>\n<p>\u5916\u90e8\u30ad\u30fc\u306f\u53c2\u7167\u6574\u5408\u6027\u3092\u7dad\u6301\u3059\u308b\u3002\u5b50\u30c6\u30fc\u30d6\u30eb\u306e\u30ec\u30b3\u30fc\u30c9\u304c\u89aa\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u5fdc\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u304c\u5b58\u5728\u3057\u306a\u3044\u72b6\u614b\u3067\u5b58\u5728\u3059\u308b\u3053\u3068\u306f\u4fdd\u8a3c\u3055\u308c\u306a\u3044\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5b64\u7acb\u30c7\u30fc\u30bf\u3092\u9632\u3050\u3002<\/p>\n<ul>\n<li><strong>\u524a\u9664\u6642\u306b\u9023\u9396\u51e6\u7406\uff1a<\/strong> \u89aa\u304c\u524a\u9664\u3055\u308c\u308b\u3068\u3001\u5b50\u3082\u81ea\u52d5\u7684\u306b\u524a\u9664\u3055\u308c\u308b\u3002<\/li>\n<li><strong>\u524a\u9664\u3092\u5236\u9650\uff1a<\/strong> \u5b50\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u3001\u89aa\u306e\u524a\u9664\u3092\u9632\u3050\u3002<\/li>\n<li><strong>\u524a\u9664\u6642\u306bNULL\u8a2d\u5b9a\uff1a<\/strong> \u89aa\u3092\u524a\u9664\u3059\u308b\u304c\u3001\u5b50\u30ec\u30b3\u30fc\u30c9\u306f\u5916\u90e8\u30ad\u30fc\u304cNULL\u306e\u307e\u307e\u6b8b\u3059\u3002<\/li>\n<\/ul>\n<h3>\u30c1\u30a7\u30c3\u30af\u5236\u7d04<\/h3>\n<p>\u3053\u308c\u3089\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306b\u76f4\u63a5\u3001\u7279\u5b9a\u306e\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3092\u5f37\u5236\u3057\u307e\u3059\u3002\u4f8b\u3068\u3057\u3066\u3001<em>\u4fa1\u683c<\/em>\u304c\u30bc\u30ed\u3088\u308a\u5927\u304d\u3044\u3053\u3068\u3001\u307e\u305f\u306f<em>\u958b\u59cb\u65e5<\/em>\u304c<em>\u7d42\u4e86\u65e5<\/em>.<\/p>\n<h2>\u26a0\ufe0f 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