{"id":1778,"date":"2026-03-24T08:33:42","date_gmt":"2026-03-24T08:33:42","guid":{"rendered":"https:\/\/www.go-diagram.com\/ja\/normalization-meets-erd-designing-efficient-database-structures\/"},"modified":"2026-03-24T08:33:42","modified_gmt":"2026-03-24T08:33:42","slug":"normalization-meets-erd-designing-efficient-database-structures","status":"publish","type":"post","link":"https:\/\/www.go-diagram.com\/ja\/normalization-meets-erd-designing-efficient-database-structures\/","title":{"rendered":"\u6b63\u898f\u5316\u3068ERD\u306e\u878d\u5408\uff1a\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u306e\u8a2d\u8a08"},"content":{"rendered":"<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u8a2d\u8a08\u3059\u308b\u3053\u3068\u306f\u3001\u5358\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3059\u308b\u3053\u3068\u306b\u3068\u3069\u307e\u3089\u306a\u3044\u3002\u60c5\u5831\u306e\u69cb\u9020\u3092\u3001\u6574\u5408\u6027\u3092\u4fdd\u3061\u3001\u91cd\u8907\u3092\u6e1b\u3089\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\u5f62\u3067\u6574\u3048\u308b\u3053\u3068\u3067\u3042\u308b\u3002\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u306b\u3064\u3044\u3066\u8a9e\u308b\u3068\u304d\u3001\u4e8c\u3064\u306e\u67f1\u304c\u969b\u7acb\u3064\uff1a<strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09<\/strong> \u304a\u3088\u3073 <strong>\u6b63\u898f\u5316<\/strong>\u3053\u308c\u3089\u306e\u6982\u5ff5\u306f\u72ec\u7acb\u3057\u305f\u6280\u8853\u3067\u306f\u306a\u304f\u3001\u4e92\u3044\u306b\u88dc\u3044\u5408\u3046\u30c4\u30fc\u30eb\u3067\u3042\u308a\u3001\u5805\u56fa\u306a\u30c7\u30fc\u30bf\u57fa\u76e4\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306b\u9023\u643a\u3057\u3066\u6a5f\u80fd\u3059\u308b\u3002<\/p>\n<p>\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001ERD\u306e\u8996\u899a\u7684\u660e\u78ba\u6027\u3068\u6b63\u898f\u5316\u306e\u69cb\u9020\u7684\u53b3\u5bc6\u6027\u3092\u7d71\u5408\u3059\u308b\u65b9\u6cd5\u3092\u63a2\u308b\u3002\u6982\u5ff5\u30e2\u30c7\u30eb\u3092\u3001\u6642\u4ee3\u3092\u7d4c\u3066\u3082\u8010\u3048\u3046\u308b\u5b9f\u7528\u7684\u306a\u30b9\u30ad\u30fc\u30de\u306b\u5909\u63db\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3092\u4e01\u5be7\u306b\u8aac\u660e\u3059\u308b\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Kawaii-style educational infographic illustrating how Entity Relationship Diagrams (ERD) and database normalization work together to create efficient database structures, featuring cute pastel visuals of the 3-step normalization process (1NF, 2NF, 3NF), a library example showing data redundancy reduction, normalization vs denormalization trade-offs, and best practices checklist for database design\" decoding=\"async\" src=\"https:\/\/www.go-diagram.com\/wp-content\/uploads\/2026\/03\/kawaii-erd-normalization-database-design-infographic.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83d\udcd0 \u57fa\u76e4\u3092\u7406\u89e3\u3059\u308b\uff1aERD\u3068\u6b63\u898f\u5316<\/h2>\n<p>\u8a2d\u8a08\u30d7\u30ed\u30bb\u30b9\u306b\u53d6\u308a\u7d44\u3080\u524d\u306b\u3001\u3053\u308c\u3089\u306e\u4e8c\u3064\u306e\u624b\u6cd5\u304c\u305d\u308c\u305e\u308c\u679c\u305f\u3059\u7570\u306a\u308b\u5f79\u5272\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3042\u308b\u3002<\/p>\n<h3>\ud83d\udcca \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u3068\u306f\u4f55\u304b\uff1f<\/h3>\n<p>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u8996\u899a\u7684\u8a2d\u8a08\u56f3\u3068\u3057\u3066\u6a5f\u80fd\u3059\u308b\u3002\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\uff08\u30c6\u30fc\u30d6\u30eb\uff09\u3001\u5c5e\u6027\uff08\u5217\uff09\u3001\u305d\u308c\u3089\u306e\u9593\u306e\u95a2\u4fc2\uff08\u30ea\u30f3\u30af\uff09\u3092\u660e\u793a\u3059\u308b\u3002\u307e\u308b\u3067\u5efa\u7269\u306e\u5efa\u7bc9\u56f3\u306e\u3088\u3046\u306a\u3082\u306e\u3060\u3002\u6b21\u306e\u3088\u3046\u306a\u554f\u3044\u306b\u7b54\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\uff1a<\/p>\n<ul>\n<li>\u79c1\u305f\u3061\u306e\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u6838\u5fc3\u3068\u306a\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u4f55\u3067\u3059\u304b\uff1f\uff08\u4f8b\uff1a<em>\u9867\u5ba2<\/em>, <em>\u6ce8\u6587<\/em>)<\/li>\n<li>\u3053\u308c\u3089\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3069\u306e\u3088\u3046\u306b\u76f8\u4e92\u4f5c\u7528\u3057\u307e\u3059\u304b\uff1f\uff08\u4f8b\uff1a1\u4eba\u306e<em>\u9867\u5ba2<\/em>\u304c\u591a\u6570\u306e<em>\u6ce8\u6587<\/em>)<\/li>\n<li>\u5404\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u4fdd\u5b58\u3059\u308b\u5fc5\u8981\u306e\u3042\u308b\u30c7\u30fc\u30bf\u306f\u4f55\u3067\u3059\u304b\uff1f\uff08\u4f8b\uff1a<em>\u9867\u5ba2<\/em>\u306b\u306f<em>\u6c0f\u540d<\/em> \u304a\u3088\u3073 <em>\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9<\/em>)<\/li>\n<\/ul>\n<p>ERD\u304c\u306a\u3051\u308c\u3070\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306f\u5f53\u3066\u305a\u3063\u307d\u3046\u306e\u30b2\u30fc\u30e0\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3002\u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u304c\u7406\u89e3\u3067\u304d\u308b\u9ad8\u30ec\u30d9\u30eb\u306a\u8996\u70b9\u3092\u63d0\u4f9b\u3057\u3001\u30b3\u30fc\u30c9\u304c1\u884c\u3082\u66f8\u304b\u308c\u308b\u524d\u306b\u3001\u5168\u54e1\u304c\u30c7\u30fc\u30bf\u8981\u4ef6\u306b\u3064\u3044\u3066\u5408\u610f\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3002<\/p>\n<h3>\ud83e\uddfc \u6b63\u898f\u5316\u3068\u306f\u4f55\u304b\uff1f<\/h3>\n<p>\u6b63\u898f\u5316\u3068\u306f\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3092\u6e1b\u3089\u3057\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u30c7\u30fc\u30bf\u3092\u6574\u7406\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002\u5927\u304d\u306a\u30c6\u30fc\u30d6\u30eb\u3092\u3088\u308a\u5c0f\u3055\u306a\u8ad6\u7406\u69cb\u9020\u306b\u5206\u5272\u3057\u3001\u305d\u308c\u3089\u306e\u9593\u306e\u95a2\u4fc2\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3092\u542b\u307f\u307e\u3059\u3002\u76ee\u7684\u306f\u3001\u5404\u30c7\u30fc\u30bf\u304c\u6b63\u78ba\u306b1\u304b\u6240\u306b\u306e\u307f\u683c\u7d0d\u3055\u308c\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u306a\u305c\u3053\u308c\u304c\u91cd\u8981\u306a\u306e\u304b\uff1f<\/p>\n<ul>\n<li><strong>\u30c7\u30fc\u30bf\u6574\u5408\u6027\uff1a<\/strong>\u9867\u5ba2\u306e\u4f4f\u6240\u304c\u5909\u66f4\u3055\u308c\u305f\u5834\u5408\u30011\u304b\u6240\u3067\u66f4\u65b0\u3059\u308c\u3070\u3088\u304f\u300110\u304b\u6240\u3092\u66f4\u65b0\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<li><strong>\u30b9\u30c8\u30ec\u30fc\u30b8\u52b9\u7387\uff1a<\/strong>\u91cd\u8907\u30c7\u30fc\u30bf\u304c\u5c11\u306a\u3051\u308c\u3070\u3001\u30c7\u30a3\u30b9\u30af\u30b9\u30da\u30fc\u30b9\u306e\u4f7f\u7528\u91cf\u3082\u5c11\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u4fdd\u5b88\u6027\uff1a<\/strong>\u6642\u9593\u306e\u7d4c\u904e\u3068\u3068\u3082\u306b\u3001\u30b9\u30ad\u30fc\u30de\u306e\u4fdd\u5b88\u3084\u66f4\u65b0\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>\u2699\ufe0f \u4ea4\u5dee\u70b9\uff1aERD\u3068\u6b63\u898f\u5316\u306e\u7d71\u5408<\/h2>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306f\u3057\u3070\u3057\u3070ERD\u304b\u3089\u59cb\u307e\u308a\u307e\u3059\u304c\u3001\u539f\u59cb\u7684\u306aERD\u306f\u751f\u7523\u74b0\u5883\u306b\u3059\u3050\u306b\u306f\u4f7f\u7528\u3067\u304d\u307e\u305b\u3093\u3002\u6b63\u898f\u5316\u304c\u5bfe\u51e6\u3059\u308b\u91cd\u8907\u304c\u3057\u3070\u3057\u3070\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3089\u3067\u3059\u3002\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u306f\u3001\u6982\u5ff5\u7684ERD\u3092\u4f5c\u6210\u3057\u3001\u7570\u5e38\u3092\u691c\u51fa\u3059\u308b\u305f\u3081\u306b\u5206\u6790\u3057\u3001\u6b63\u898f\u5316\u30eb\u30fc\u30eb\u3092\u9069\u7528\u3057\u3066\u30b9\u30ad\u30fc\u30de\u3092\u6d17\u7df4\u3059\u308b\u3053\u3068\u3092\u542b\u307f\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u304c\u4e00\u822c\u7684\u306a\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3067\u3059\uff1a<\/p>\n<ol>\n<li><strong>\u6982\u5ff5\u8a2d\u8a08\uff1a<\/strong>\u8981\u4ef6\u306b\u57fa\u3065\u3044\u3066\u521d\u671f\u306eERD\u3092\u63cf\u753b\u3059\u308b\u3002<\/li>\n<li><strong>\u8ad6\u7406\u8a2d\u8a08\uff1a<\/strong>ERD\u3092\u30c6\u30fc\u30d6\u30eb\u3068\u5217\u306b\u6d17\u7df4\u3059\u308b\u3002<\/li>\n<li><strong>\u6b63\u898f\u5316\uff1a<\/strong>\u7570\u5e38\u3092\u89e3\u6d88\u3059\u308b\u305f\u3081\u306b\u3001\u6b63\u898f\u5316\u5f62\u5f0f\uff081NF\u30012NF\u30013NF\uff09\u3092\u9069\u7528\u3059\u308b\u3002<\/li>\n<li><strong>\u7269\u7406\u8a2d\u8a08\uff1a<\/strong>\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30f3\u30b8\u30f3\u304a\u3088\u3073\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8981\u4ef6\u306b\u6700\u9069\u5316\u3059\u308b\u3002<\/li>\n<\/ol>\n<h2>\ud83d\udd0d \u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\uff1aERD\u304b\u3089\u6b63\u898f\u5316\u30b9\u30ad\u30fc\u30de\u3078<\/h2>\n<p>\u5b9f\u969b\u306b\u3069\u3046\u6a5f\u80fd\u3059\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u3001\u5b9f\u969b\u306e\u30b7\u30ca\u30ea\u30aa\u3092\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u3067\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u56f3\u66f8\u9928\u3092\u7ba1\u7406\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3057\u3066\u3044\u308b\u3068\u60f3\u50cf\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>1. \u6b63\u898f\u5316\u524d\u306e\u72b6\u614b<\/h3>\n<p>\u521d\u671f\u6bb5\u968e\u3067\u306f\u3001\u672c\u3068\u8457\u8005\u306e\u3059\u3079\u3066\u306e\u60c5\u5831\u3092\u4fdd\u6301\u3059\u308b1\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u8a2d\u8a08\u3059\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3053\u308c\u3092\u975e\u6b63\u898f\u5316\u30c6\u30fc\u30d6\u30eb\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>BookID<\/th>\n<th>\u30bf\u30a4\u30c8\u30eb<\/th>\n<th>\u8457\u8005\u540d<\/th>\n<th>\u8457\u8005\u96fb\u8a71\u756a\u53f7<\/th>\n<th>\u30b8\u30e3\u30f3\u30eb<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>101<\/td>\n<td>\u5049\u5927\u306a\u5c0f\u8aac<\/td>\n<td>\u30b8\u30e7\u30f3\u30fb\u30c9\u30fc<\/td>\n<td>555-0101<\/td>\n<td>\u30d5\u30a3\u30af\u30b7\u30e7\u30f3<\/td>\n<\/tr>\n<tr>\n<td>102<\/td>\n<td>\u30df\u30b9\u30c6\u30ea\u30fc\u672c<\/td>\n<td>\u30b8\u30e7\u30f3\u30fb\u30c9\u30fc<\/td>\n<td>555-0101<\/td>\n<td>\u30df\u30b9\u30c6\u30ea\u30fc<\/td>\n<\/tr>\n<tr>\n<td>103<\/td>\n<td>\u5225\u306e\u672c<\/td>\n<td>\u30b8\u30a7\u30fc\u30f3\u30fb\u30b9\u30df\u30b9<\/td>\n<td>555-0102<\/td>\n<td>\u30d5\u30a3\u30af\u30b7\u30e7\u30f3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u3053\u3053\u306b\u554f\u984c\u304c\u3042\u308b\u3053\u3068\u306b\u6c17\u3065\u304d\u307e\u3057\u305f\u304b\uff1f<em>\u30b8\u30e7\u30f3\u30fb\u30c9\u30fc<\/em>\u306e\u96fb\u8a71\u756a\u53f7\u304c\u7e70\u308a\u8fd4\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3082\u3057\u5f7c\u304c\u756a\u53f7\u3092\u5909\u66f4\u3057\u305f\u3089\u3001\u8907\u6570\u306e\u884c\u3092\u66f4\u65b0\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u306f<strong>\u66f4\u65b0\u7570\u5e38<\/strong>.<\/p>\n<h3>2. \u7b2c1\u6b63\u898f\u5f62\uff081NF\uff09<\/h3>\n<p>\u6b63\u898f\u5316\u306e\u6700\u521d\u306e\u30eb\u30fc\u30eb\u306f\u3001\u539f\u5b50\u6027\u3092\u78ba\u4fdd\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u5404\u5217\u306b\u306f\u5358\u4e00\u306e\u5024\u306e\u307f\u3092\u542b\u307f\u3001\u7e70\u308a\u8fd4\u3057\u30b0\u30eb\u30fc\u30d7\u304c\u3042\u3063\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<ul>\n<li><strong>\u30eb\u30fc\u30eb\uff1a<\/strong>\u7e70\u308a\u8fd4\u3057\u30b0\u30eb\u30fc\u30d7\u3092\u6392\u9664\u3057\u3001\u539f\u5b50\u5024\u3092\u78ba\u4fdd\u3059\u308b\u3002<\/li>\n<li><strong>\u9069\u7528\uff1a<\/strong> \u5f53\u793e\u306e\u56f3\u66f8\u9928\u306e\u4f8b\u3067\u306f\u3001\u521d\u671f\u30c6\u30fc\u30d6\u30eb\u306f\u3059\u3067\u306b\u539f\u5b50\u7684\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u3092\u6301\u3063\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4eee\u306b<em>BookID<\/em>\u306f\u4e00\u610f\u3067\u3042\u308b\u3068\u4eee\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u7d50\u679c\uff1a<\/strong> \u4eca\u3084\u3001\u5404\u30bb\u30eb\u306b1\u3064\u306e\u30c7\u30fc\u30bf\u3057\u304b\u683c\u7d0d\u3055\u308c\u3066\u3044\u306a\u3044\u30c6\u30fc\u30d6\u30eb\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3>3. \u7b2c2\u6b63\u898f\u5f62\uff082NF\uff09<\/h3>\n<p>\u30c6\u30fc\u30d6\u30eb\u304c1NF\u306b\u3042\u308c\u3070\u3001\u90e8\u5206\u7684\u4f9d\u5b58\u95a2\u4fc2\u3092\u78ba\u8a8d\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\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u306b\u5b8c\u5168\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u5834\u5408\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30b7\u30ca\u30ea\u30aa\uff1a<\/strong> \u3082\u3057\u8907\u5408\u30ad\u30fc\uff08\u4f8b\uff1a<em>BookID<\/em> + <em>AuthorID<\/em>\uff09\u304c\u3042\u3063\u305f\u5834\u5408\u3001<em>AuthorPhone<\/em>\u304c\u5168\u4f53\u306e\u30ad\u30fc\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u304b\u3001\u3042\u308b\u3044\u306f\u8457\u8005\u90e8\u5206\u3060\u3051\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n<li><strong>\u30a2\u30af\u30b7\u30e7\u30f3\uff1a<\/strong> \u4eca\u56de\u306e\u4f8b\u3067\u306f\u3001<em>AuthorPhone<\/em>\u306f<em>AuthorName<\/em>\u306b\u4f9d\u5b58\u3057\u3066\u304a\u308a\u3001<em>BookID<\/em>\u3067\u306f\u306a\u3044\u3002\u3053\u308c\u306f\u3001\u8457\u8005\u30c7\u30fc\u30bf\u3092\u66f8\u7c4d\u30c7\u30fc\u30bf\u304b\u3089\u5206\u96e2\u3059\u3079\u304d\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u5506\u3057\u3066\u3044\u308b\u3002<\/li>\n<\/ul>\n<h3>4. \u7b2c\u4e09\u6b63\u898f\u5f62\uff083NF\uff09<\/h3>\n<p>\u3053\u3053\u304c\u672c\u5f53\u306e\u9b54\u6cd5\u304c\u767a\u52d5\u3059\u308b\u5834\u6240\u3067\u3059\u30023NF\u306f\u63a8\u79fb\u7684\u4f9d\u5b58\u3092\u6392\u9664\u3057\u307e\u3059\u3002\u975e\u30ad\u30fc\u5c5e\u6027\u306f\u4ed6\u306e\u975e\u30ad\u30fc\u5c5e\u6027\u306b\u4f9d\u5b58\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002<\/p>\n<ul>\n<li><strong>\u30eb\u30fc\u30eb\uff1a<\/strong>\u3069\u306e\u5c5e\u6027\u3082\u3001\u4ed6\u306e\u975e\u30ad\u30fc\u5c5e\u6027\u306b\u4f9d\u5b58\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002<\/li>\n<li><strong>\u9069\u7528\uff1a<\/strong> <em>AuthorPhone<\/em>\u306f<em>AuthorName<\/em>\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u3002<em>AuthorName<\/em>\u304c\u66f8\u7c4d\u30c6\u30fc\u30d6\u30eb\u306e\u4e3b\u30ad\u30fc\u3067\u306f\u306a\u3044\u305f\u3081\u3001\u8457\u8005\u60c5\u5831\u3092\u5225\u3005\u306e<em>Authors<\/em>\u30c6\u30fc\u30d6\u30eb\u306b\u79fb\u52d5\u3059\u308b\u3002<\/li>\n<li><strong>\u7d50\u679c\uff1a<\/strong> \u3055\u3066\u3001\u8457\u8005\u306e\u96fb\u8a71\u756a\u53f7\u3092\u66f4\u65b0\u3059\u308b\u306b\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u300c\u8457\u8005\u300d\u30c6\u30fc\u30d6\u30eb\u306e\u30ec\u30b3\u30fc\u30c9\u30921\u3064\u3060\u3051\u5909\u66f4\u3059\u308c\u3070\u3088\u3044\u3002<em>\u8457\u8005<\/em> \u30c6\u30fc\u30d6\u30eb\u3067\u3001\u8907\u6570\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u3059\u308b\u5fc5\u8981\u306f\u306a\u3044\u3002<em>\u66f8\u7c4d<\/em> \u30c6\u30fc\u30d6\u30eb\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udccb \u6b63\u898f\u5316 vs. \u975e\u6b63\u898f\u5316\uff1a\u30d0\u30e9\u30f3\u30b9\u3092\u898b\u3064\u3051\u308b<\/h2>\n<p>\u6b63\u898f\u5316\u306f\u6574\u5408\u6027\u306b\u3068\u3063\u3066\u4e0d\u53ef\u6b20\u3067\u3059\u304c\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u305f\u3081\u306e\u4e07\u80fd\u89e3\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u3001\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f\u304c\u66f8\u304d\u8fbc\u307f\u3088\u308a\u3082\u983b\u7e41\u306b\u884c\u308f\u308c\u308b\u306e\u3067\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3067\u306f\u3001<strong>\u975e\u6b63\u898f\u5316<\/strong> \u304c\u6709\u76ca\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\ud83d\udcc9 \u975e\u6b63\u898f\u5316\u3059\u3079\u304d\u30bf\u30a4\u30df\u30f3\u30b0<\/h3>\n<p>\u975e\u6b63\u898f\u5316\u3068\u306f\u3001\u8aad\u307f\u53d6\u308a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u3001\u6b63\u898f\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u91cd\u8907\u30c7\u30fc\u30bf\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u3068\u901f\u5ea6\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u9ad8\u983b\u5ea6\u306e\u8aad\u307f\u53d6\u308a:<\/strong> \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c1\u79d2\u9593\u306b\u6570\u5343\u56de\u30c7\u30fc\u30bf\u3092\u7167\u4f1a\u3059\u308b\u5834\u5408\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u7d50\u5408\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u30ec\u30dd\u30fc\u30c8\u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9:<\/strong> \u96c6\u8a08\u30c7\u30fc\u30bf\u306f\u3042\u3089\u304b\u3058\u3081\u8a08\u7b97\u30fb\u4fdd\u5b58\u3055\u308c\u3066\u304a\u308a\u3001\u8907\u96d1\u306a\u30af\u30a8\u30ea\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/li>\n<li><strong>\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565:<\/strong> \u6642\u306b\u306f\u3001\u975e\u6b63\u898f\u5316\u3055\u308c\u305f\u30d3\u30e5\u30fc\u304c\u983b\u7e41\u306b\u30a2\u30af\u30bb\u30b9\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u3057\u3066\u6a5f\u80fd\u3059\u308b\u3002<\/li>\n<\/ul>\n<p>\u3057\u304b\u3057\u3001\u3053\u308c\u306b\u306f\u30ea\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u3002\u91cd\u8907\u30c7\u30fc\u30bf\u306e\u540c\u671f\u3092\u624b\u52d5\u307e\u305f\u306f\u30c8\u30ea\u30ac\u30fc\u3067\u7ba1\u7406\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u9069\u5207\u306b\u51e6\u7406\u3055\u308c\u306a\u3044\u3068\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u304c\u640d\u306a\u308f\u308c\u307e\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u8981\u56e0<\/th>\n<th>\u6b63\u898f\u5316<\/th>\n<th>\u975e\u6b63\u898f\u5316<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u30c7\u30fc\u30bf\u6574\u5408\u6027<\/strong><\/td>\n<td>\u9ad8\u3044\uff08\u552f\u4e00\u306e\u771f\u5b9f\u306e\u30bd\u30fc\u30b9\uff09<\/td>\n<td>\u4f4e\u3044\uff08\u540c\u671f\u30ed\u30b8\u30c3\u30af\u304c\u5fc5\u8981\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u66f8\u304d\u8fbc\u307f\u901f\u5ea6<\/strong><\/td>\n<td>\u9045\u3044\uff08\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\uff09<\/td>\n<td>\u901f\u3044\uff08\u7d50\u5408\u304c\u5c11\u306a\u3044\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u8aad\u307f\u53d6\u308a\u901f\u5ea6<\/strong><\/td>\n<td>\u9045\u3044\uff08\u8907\u6570\u306e\u7d50\u5408\uff09<\/td>\n<td>\u901f\u3044\uff08\u7d50\u5408\u304c\u5c11\u306a\u3044\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u30b9\u30c8\u30ec\u30fc\u30b8<\/strong><\/td>\n<td>\u52b9\u7387\u7684<\/td>\n<td>\u5197\u9577<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83d\udee0\ufe0f \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74<\/h2>\n<p>\u7d4c\u9a13\u8c4a\u5bcc\u306a\u30c7\u30b6\u30a4\u30ca\u30fc\u3067\u3055\u3048\u30df\u30b9\u3092\u72af\u3059\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u304c\u5065\u5168\u306a\u72b6\u614b\u3092\u4fdd\u3064\u305f\u3081\u306b\u3001\u3053\u308c\u3089\u306e\u4e00\u822c\u7684\u306a\u7f60\u3092\u907f\u3051\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>\u274c \u30c7\u30fc\u30bf\u578b\u306e\u7121\u8996<\/h3>\n<p>\u9069\u5207\u3067\u306a\u3044\u30c7\u30fc\u30bf\u578b\u3092\u9078\u629e\u3059\u308b\u3068\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u81a8\u5f35\u3084\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u554f\u984c\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u65e5\u4ed8\u306b\u30c6\u30ad\u30b9\u30c8\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u4f7f\u7528\u3057\u305f\u308a\u3001\u96fb\u8a71\u756a\u53f7\u306b\u6574\u6570\u3092\u4f7f\u7528\u3057\u305f\u308a\u3059\u308b\u3068\u3001\u30b9\u30da\u30fc\u30b9\u3092\u7121\u99c4\u306b\u4f7f\u3044\u3001\u691c\u8a3c\u3092\u8907\u96d1\u306b\u3057\u307e\u3059\u3002<\/p>\n<h3>\u274c \u904e\u5270\u306a\u6b63\u898f\u5316<\/h3>\n<p>\u3059\u3079\u3066\u306e\u72b6\u6cc1\u30675NF\u3084BCNF\uff08\u30dc\u30a4\u30b9\u30fb\u30b3\u30c3\u30c9\u6b63\u898f\u5f62\uff09\u3092\u76ee\u6307\u3059\u3068\u3001\u30af\u30a8\u30ea\u304c\u975e\u5e38\u306b\u8907\u96d1\u306b\u306a\u308a\u307e\u3059\u3002\u5834\u5408\u306b\u3088\u3063\u3066\u306f3NF\u3067\u5341\u5206\u3067\u3059\u3002\u5358\u306b\u6b63\u898f\u5316\u3059\u308b\u305f\u3081\u3060\u3051\u306b\u6b63\u898f\u5316\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002<\/p>\n<h3>\u274c \u5f31\u3044\u4e3b\u30ad\u30fc<\/h3>\n<p>\u30c7\u30fc\u30bf\u304c\u5909\u66f4\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u5834\u5408\u3001\u81ea\u7136\u30ad\u30fc\uff08\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306a\u3069\uff09\u3092\u4e3b\u30ad\u30fc\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u306e\u306f\u30ea\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u3002\u5185\u90e8\u306e\u95a2\u4fc2\u6027\u306b\u306f\u3001\u64ec\u4f3c\u30ad\u30fc\uff08\u81ea\u52d5\u5897\u5206\u306e\u6574\u6570\u3084UUID\uff09\u306e\u65b9\u304c\u5b89\u5168\u306a\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/p>\n<h3>\u274c \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u6b20\u5982<\/h3>\n<p>\u9069\u5207\u306b\u6b63\u898f\u5316\u3055\u308c\u305f\u30b9\u30ad\u30fc\u30de\u3067\u3082\u3001\u9069\u5207\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u306a\u3051\u308c\u3070\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u308b\u5217\u3092\u7279\u5b9a\u3057\u3001<code>WHERE<\/code>, <code>JOIN<\/code>\u3001\u307e\u305f\u306f<code>ORDER BY<\/code>\u53e5\u3067\u4f7f\u7528\u3055\u308c\u308b\u5217\u3092\u7279\u5b9a\u3057\u3001\u305d\u308c\u3089\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>\ud83d\udd04 \u8a2d\u8a08\u306e\u53cd\u5fa9\u30d7\u30ed\u30bb\u30b9<\/h2>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306f\u307b\u3068\u3093\u3069\u7dda\u5f62\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u53cd\u5fa9\u7684\u306a\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002ERD\u304b\u3089\u59cb\u3081\u3001\u6b63\u898f\u5316\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u554f\u984c\u304c\u3042\u308b\u3053\u3068\u306b\u6c17\u3065\u304d\u3001\u308f\u305a\u304b\u306b\u975e\u6b63\u898f\u5316\u3057\u3001\u305d\u306e\u5f8cERD\u3092\u518d\u78ba\u8a8d\u3057\u3066\u95a2\u4fc2\u6027\u304c\u6b63\u78ba\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n<h3>\ud83d\udd04 \u30d5\u30a3\u30cb\u30c3\u30b7\u30e5\u30b9\u30c6\u30c3\u30d7<\/h3>\n<ul>\n<li><strong>\u8981\u4ef6\u306e\u898b\u76f4\u3057\uff1a<\/strong>\u65b0\u3057\u3044\u6a5f\u80fd\u306b\u65b0\u3057\u3044\u30c6\u30fc\u30d6\u30eb\u304c\u5fc5\u8981\u3067\u3059\u304b\uff1f<\/li>\n<li><strong>\u30af\u30a8\u30ea\u5206\u6790\uff1a<\/strong>\u6700\u3082\u9045\u3044\u30af\u30a8\u30ea\u3092\u78ba\u8a8d\u3057\u3001\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u7279\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>\u5236\u7d04\u306e\u78ba\u8a8d\uff1a<\/strong>\u5b64\u7acb\u3057\u305f\u30ec\u30b3\u30fc\u30c9\u3092\u9632\u3050\u305f\u3081\u306b\u3001\u5916\u90e8\u30ad\u30fc\u304c\u9069\u5207\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u5316\uff1a<\/strong>ERD\u3092\u5e38\u306b\u6700\u65b0\u306e\u72b6\u614b\u306b\u4fdd\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u53e4\u304f\u306a\u3063\u305f\u56f3\u306f\u3001\u4f55\u3082\u63cf\u304b\u308c\u3066\u3044\u306a\u3044\u56f3\u3088\u308a\u3082\u60aa\u3044\u3067\u3059\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udcc8 \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u95a2\u3059\u308b\u8003\u616e\u4e8b\u9805<\/h2>\n<p>\u6b63\u898f\u5316\u306f\u4e3b\u306b\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u306b\u5bfe\u51e6\u3057\u307e\u3059\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u5225\u554f\u984c\u3067\u3042\u308a\u3001\u3057\u3070\u3057\u3070\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u304c\u5fc5\u8981\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u4e21\u8005\u306f\u95a2\u9023\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>\ud83d\ude80 JOIN\u306e\u8907\u96d1\u3055<\/h3>\n<p>\u975e\u5e38\u306b\u6b63\u898f\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u3001\u3088\u308a\u591a\u304f\u306e<code>JOIN<\/code>\u64cd\u4f5c\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u73fe\u4ee3\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30f3\u30b8\u30f3\u306fJOIN\u306e\u6700\u9069\u5316\u304c\u975e\u5e38\u306b\u512a\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u904e\u5270\u306aJOIN\u306f\u4f9d\u7136\u3068\u3057\u3066\u30ec\u30a4\u30c6\u30f3\u30b7\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\ud83d\udce6 \u30b9\u30c8\u30ec\u30fc\u30b8\u30a8\u30f3\u30b8\u30f3<\/h3>\n<p>\u7570\u306a\u308b\u30b9\u30c8\u30ec\u30fc\u30b8\u30a8\u30f3\u30b8\u30f3\u306f\u30c7\u30fc\u30bf\u3092\u7570\u306a\u308b\u65b9\u6cd5\u3067\u6271\u3044\u307e\u3059\u3002\u4e00\u90e8\u306f\u884c\u30d9\u30fc\u30b9\u306e\u30b9\u30c8\u30ec\u30fc\u30b8\u3092\u597d\u3080\u4e00\u65b9\u3001\u4ed6\u306e\u3082\u306e\u306f\u5217\u30d9\u30fc\u30b9\u306e\u30b9\u30c8\u30ec\u30fc\u30b8\u3092\u597d\u307f\u307e\u3059\u3002\u3042\u306a\u305f\u306e\u6b63\u898f\u5316\u6226\u7565\u306f\u3001\u57fa\u76e4\u3068\u306a\u308b\u30a8\u30f3\u30b8\u30f3\u306b\u5fdc\u3058\u3066\u8abf\u6574\u304c\u5fc5\u8981\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\ud83d\udd12 \u5236\u7d04\u3068\u30c8\u30ea\u30ac\u30fc<\/h3>\n<p>\u5236\u7d04\uff08\u5916\u90e8\u30ad\u30fc\u306a\u3069\uff09\u3092\u7528\u3044\u3066\u6b63\u898f\u5316\u30eb\u30fc\u30eb\u3092\u5f37\u5236\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u54c1\u8cea\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u691c\u8a3c\u306b\u30c8\u30ea\u30ac\u30fc\u3092\u904e\u5270\u306b\u4f7f\u7528\u3059\u308b\u3068\u3001\u66f8\u304d\u8fbc\u307f\u64cd\u4f5c\u304c\u9045\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u8ce2\u304f\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>\ud83e\udde9 \u5b9f\u969b\u306e\u4f8b\uff1aEC\u30aa\u30fc\u30c0\u30fc\u30b7\u30b9\u30c6\u30e0<\/h2>\n<p>\u5c11\u3057\u8907\u96d1\u306a\u30b7\u30ca\u30ea\u30aa\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff1a\u30aa\u30f3\u30e9\u30a4\u30f3\u30b9\u30c8\u30a2\u3067\u3059\u3002<\/p>\n<h3>\u521d\u671f\u306eERD\u30b3\u30f3\u30bb\u30d7\u30c8<\/h3>\n<p>\u6700\u521d\u306f\u3001<em>Order<\/em>\u30c6\u30fc\u30d6\u30eb\u304c\u3042\u308a\u3001\u88fd\u54c1\u540d\u3001\u4fa1\u683c\u3001\u9867\u5ba2\u60c5\u5831\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u4f1d\u7d71\u7684\u306a\u300c\u30d5\u30e9\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u300d\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u3059\u3002<\/p>\n<h3>\u6b63\u898f\u5316\u30a2\u30d7\u30ed\u30fc\u30c1<\/h3>\n<p>\u3053\u308c\u3092\u4fee\u6b63\u3059\u308b\u305f\u3081\u306b\u3001\u30c7\u30fc\u30bf\u3092\u5206\u5272\u3057\u307e\u3059\uff1a<\/p>\n<ul>\n<li><strong>Customers\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong> \u9867\u5ba2\u60c5\u5831\u3092\u683c\u7d0d\u3057\u307e\u3059\uff08\u540d\u524d\u3001\u4f4f\u6240\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\uff09\u3002<\/li>\n<li><strong>Products\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong> \u88fd\u54c1\u60c5\u5831\u3092\u683c\u7d0d\u3057\u307e\u3059\uff08\u540d\u524d\u3001\u4fa1\u683c\u3001\u5728\u5eab\uff09\u3002<\/li>\n<li><strong>Orders\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong> \u53d6\u5f15\u60c5\u5831\u3092\u683c\u7d0d\u3057\u307e\u3059\uff08\u9867\u5ba2ID\u3001\u6ce8\u6587\u65e5\u3001\u5408\u8a08\uff09\u3002<\/li>\n<li><strong>OrderItems\u30c6\u30fc\u30d6\u30eb\uff1a<\/strong> \u6ce8\u6587\u3068\u88fd\u54c1\u3092\u30ea\u30f3\u30af\u3057\u307e\u3059\uff08\u6ce8\u6587ID\u3001\u88fd\u54c1ID\u3001\u6570\u91cf\u3001\u6ce8\u6587\u6642\u306e\u4fa1\u683c\uff09\u3002<\/li>\n<\/ul>\n<p>\u3053\u306e\u69cb\u9020\u306b\u3088\u308a\u3001\u6b21\u306e\u3088\u3046\u306a\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n<ul>\n<li>\u88fd\u54c1\u4fa1\u683c\u30921\u304b\u6240\u3067\u66f4\u65b0\u3067\u304d\u307e\u3059\uff08<em>Products<\/em>\u30c6\u30fc\u30d6\u30eb\uff09\u3002<\/li>\n<li>\u5c65\u6b74\u4fa1\u683c\u3092\u300c<em>OrderItems<\/em>\u300d\u30c6\u30fc\u30d6\u30eb\uff08\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\uff09<\/li>\n<li>\u5916\u90e8\u30ad\u30fc\u3092\u901a\u3058\u3066\u3001\u9867\u5ba2\u306b\u672a\u51e6\u7406\u306e\u6ce8\u6587\u304c\u3042\u308b\u5834\u5408\u306f\u524a\u9664\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3002<\/li>\n<\/ul>\n<h2>\ud83c\udfaf \u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h2>\n<p>\u30b9\u30ad\u30fc\u30de\u3092\u30c7\u30d7\u30ed\u30a4\u3059\u308b\u524d\u306b\u3001\u3053\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u78ba\u8a8d\u3057\u3066\u54c1\u8cea\u3092\u78ba\u4fdd\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n<li>\u2705 <strong>\u4e3b\u30ad\u30fc\uff1a<\/strong> \u3059\u3079\u3066\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u4e00\u610f\u306e\u8b58\u5225\u5b50\u304c\u3042\u308b\u3002<\/li>\n<li>\u2705 <strong>\u5916\u90e8\u30ad\u30fc\uff1a<\/strong> \u95a2\u4fc2\u304c\u660e\u793a\u7684\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u3002<\/li>\n<li>\u2705 <strong>NULL\u8a31\u5bb9\u6027\uff1a<\/strong> \u5217\u306f\u300c<code>NOT NULL<\/code>\u300d\u3068\u3057\u3066\u30de\u30fc\u30af\u3055\u308c\u3066\u3044\u308b\u3002<\/li>\n<li>\u2705 <strong>\u30c7\u30fc\u30bf\u578b\uff1a<\/strong> \u53ef\u80fd\u306a\u9650\u308a\u5177\u4f53\u7684\u306a\u30c7\u30fc\u30bf\u578b\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<li>\u2705 <strong>\u547d\u540d\u898f\u5247\uff1a<\/strong> \u30c6\u30fc\u30d6\u30eb\u3068\u5217\u306b\u4e00\u8cab\u6027\u304c\u3042\u308a\u3001\u660e\u78ba\u306a\u540d\u524d\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<li>\u2705 <strong>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\uff1a<\/strong> ERD\u304c\u7269\u7406\u30b9\u30ad\u30fc\u30de\u3068\u4e00\u81f4\u3057\u3066\u3044\u308b\u3002<\/li>\n<li>\u2705 <strong>\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u6226\u7565\uff1a<\/strong> \u30b9\u30ad\u30fc\u30de\u304c\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u304a\u3088\u3073\u5fa9\u5143\u6642\u9593\u306b\u4e0e\u3048\u308b\u5f71\u97ff\u3092\u691c\u8a0e\u3059\u308b\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udd2e 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\u4e3b\u306a\u30dd\u30a4\u30f3\u30c8\u306e\u8981\u7d04<\/h2>\n<p>\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u3092\u8a2d\u8a08\u3059\u308b\u3053\u3068\u306f\u3001\u69cb\u9020\u3068\u67d4\u8edf\u6027\u306e\u30d0\u30e9\u30f3\u30b9\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u70b9\u3092\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\uff1a<\/p>\n<ul>\n<li><strong>ERD\u306f\u8996\u899a\u7684\u30ac\u30a4\u30c9\u3067\u3059\uff1a<\/strong> \u30d3\u30eb\u30c9\u3059\u308b\u524d\u306b\u3001\u95a2\u4fc2\u3092\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u307e\u3059\u3002<\/li>\n<li><strong> \u6b63\u898f\u5316\u306f\u69cb\u9020\u7684\u3067\u3059\uff1a<\/strong> \u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3092\u6e1b\u3089\u3059\u305f\u3081\u306b\u6574\u7406\u3057\u307e\u3059\u3002<\/li>\n<li><strong> 3NF\u304c\u76ee\u6a19\u3067\u3059\uff1a<\/strong> 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