{"id":1544,"date":"2026-03-27T00:23:38","date_gmt":"2026-03-27T00:23:38","guid":{"rendered":"https:\/\/www.viz-read.com\/ja\/how-to-build-first-erd-guide\/"},"modified":"2026-03-27T00:23:38","modified_gmt":"2026-03-27T00:23:38","slug":"how-to-build-first-erd-guide","status":"publish","type":"post","link":"https:\/\/www.viz-read.com\/ja\/how-to-build-first-erd-guide\/","title":{"rendered":"\u6700\u521d\u306eERD\u3092\u69cb\u7bc9\u3059\u308b\u65b9\u6cd5\uff1a\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u306e\u30af\u30a4\u30c3\u30af\u30b9\u30bf\u30fc\u30c8\u30ac\u30a4\u30c9"},"content":{"rendered":"<p>\u5805\u7262\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u8a2d\u8a08\u3059\u308b\u3053\u3068\u306f\u3001\u3042\u3089\u3086\u308b\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u57fa\u76e4\u3067\u3059\u3002\u69cb\u9020\u7684\u306a\u8a08\u753b\u304c\u306a\u3051\u308c\u3070\u3001\u30c7\u30fc\u30bf\u306f\u6563\u3089\u3070\u308a\u3001\u691c\u7d22\u304c\u96e3\u3057\u304f\u306a\u308a\u3001\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u306f\u3001\u3053\u306e\u69cb\u9020\u306e\u8a2d\u8a08\u56f3\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u3069\u306e\u3088\u3046\u306b\u76f8\u4e92\u4f5c\u7528\u3059\u308b\u304b\u3092\u53ef\u8996\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u304c1\u884c\u3082\u66f8\u304b\u308c\u308b\u524d\u304b\u3089\u6574\u5408\u6027\u3092\u78ba\u4fdd\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u6700\u521d\u306eERD\u3092\u4f5c\u6210\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3092\u3001\u6838\u5fc3\u7684\u306a\u6982\u5ff5\u3001\u8868\u8a18\u6cd5\u3001\u5b9f\u8df5\u7684\u306a\u30b9\u30c6\u30c3\u30d7\u306b\u7126\u70b9\u3092\u5f53\u3066\u3066\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Marker-style infographic illustrating how to build your first Entity Relationship Diagram (ERD): features core components (entities, attributes, relationships), Crow's Foot notation symbols, a 5-step workflow (identify entities, define attributes, determine relationships, establish cardinality, review and normalize), cardinality types (one-to-one, one-to-many, many-to-many), naming best practices, and common database design pitfalls to avoid\" decoding=\"async\" src=\"https:\/\/www.viz-read.com\/wp-content\/uploads\/2026\/03\/erd-quick-start-guide-infographic-marker-illustration.jpg\"\/><\/figure>\n<\/div>\n<h2>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u306e\u7406\u89e3 \ud83d\udcca<\/h2>\n<p>ERD\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u306e\u8996\u899a\u7684\u8868\u73fe\u3067\u3059\u3002\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3001\u305d\u306e\u5c5e\u6027\u3001\u304a\u3088\u3073\u305d\u308c\u3089\u306e\u9593\u306e\u95a2\u4fc2\u3092\u660e\u793a\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u30c7\u30fc\u30bf\u306e\u5730\u56f3\u3068\u8003\u3048\u3066\u304f\u3060\u3055\u3044\u3002\u9053\u8def\u5730\u56f3\u304cA\u5730\u70b9\u304b\u3089B\u5730\u70b9\u3078\u79fb\u52d5\u3059\u308b\u306e\u3092\u52a9\u3051\u308b\u3088\u3046\u306b\u3001ERD\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u304c\u30c6\u30fc\u30d6\u30eb\u9593\u306e\u95a2\u4fc2\u3092\u628a\u63e1\u3059\u308b\u306e\u3092\u52a9\u3051\u307e\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> \u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u3067\u30c7\u30fc\u30bf\u304c\u4e00\u8cab\u6027\u3068\u6b63\u78ba\u6027\u3092\u4fdd\u3064\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\uff1a<\/strong> \u958b\u767a\u8005\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u8005\u3001\u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u9593\u3067\u5171\u901a\u306e\u8a00\u8a9e\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u52b9\u7387\u6027\uff1a<\/strong> \u5197\u9577\u6027\u3092\u65e9\u671f\u306b\u7279\u5b9a\u3067\u304d\u308b\u305f\u3081\u3001\u5b9f\u88c5\u30d5\u30a7\u30fc\u30ba\u3067\u306e\u6642\u9593\u3092\u7bc0\u7d04\u3067\u304d\u307e\u3059\u3002<\/li>\n<li><strong>\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\uff1a<\/strong> \u3088\u304f\u8a2d\u8a08\u3055\u308c\u305f\u30b9\u30ad\u30fc\u30de\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u5b8c\u5168\u306b\u518d\u8a2d\u8a08\u305b\u305a\u306b\u62e1\u5f35\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3>ERD\u306e\u6838\u5fc3\u7684\u306a\u69cb\u6210\u8981\u7d20<\/h3>\n<p>\u7dda\u3084\u30dc\u30c3\u30af\u30b9\u3092\u63cf\u304f\u524d\u306b\u3001\u69cb\u6210\u8981\u7d20\u3092\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3059\u3079\u3066\u306e\u56f3\u306f\u3001\u3053\u306e3\u3064\u306e\u57fa\u672c\u8981\u7d20\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\uff1a<\/strong> \u30c7\u30fc\u30bf\u304c\u683c\u7d0d\u3055\u308c\u308b\u5bfe\u8c61\u3068\u306a\u308b\u73fe\u5b9f\u4e16\u754c\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u307e\u305f\u306f\u6982\u5ff5\u3067\u3059\u3002\u4f8b\u3068\u3057\u3066 <em>\u9867\u5ba2<\/em>, <em>\u6ce8\u6587<\/em>\u3001\u307e\u305f\u306f <em>\u88fd\u54c1<\/em>.<\/li>\n<li><strong>\u5c5e\u6027\uff1a<\/strong> \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u7279\u5b9a\u306e\u6027\u8cea\u3084\u7279\u5fb4\u3067\u3059\u3002\u305f\u3068\u3048\u3070 <em>\u9867\u5ba2<\/em> \u306b\u3064\u3044\u3066\u3001\u5c5e\u6027\u306b\u306f <em>\u6c0f\u540d<\/em>, <em>\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9<\/em>\u3001\u304a\u3088\u3073<em>\u96fb\u8a71\u756a\u53f7<\/em>.<\/li>\n<li><strong>\u95a2\u4fc2:<\/strong> 2\u3064\u4ee5\u4e0a\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u9023\u3002\u3053\u308c\u306f\u30011\u3064\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u5185\u306e\u30c7\u30fc\u30bf\u304c\u5225\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u5185\u306e\u30c7\u30fc\u30bf\u3068\u3069\u306e\u3088\u3046\u306b\u95a2\u9023\u3059\u308b\u304b\u3092\u5b9a\u7fa9\u3059\u308b\u3002<\/li>\n<\/ul>\n<h3>\u4e00\u822c\u7684\u306aERD\u8a18\u53f7\u3068\u8868\u8a18\u6cd5 \ud83d\udee0\ufe0f<\/h3>\n<p>\u3053\u308c\u3089\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u8996\u899a\u7684\u306b\u8868\u73fe\u3059\u308b\u65b9\u6cd5\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002\u6700\u3082\u4e00\u822c\u7684\u306a2\u3064\u306e\u30b9\u30bf\u30a4\u30eb\u306f\u30c1\u30a7\u30f3\u8a18\u6cd5\u3068\u30af\u30ed\u30a6\u30ba\u30d5\u30c3\u30c8\u8a18\u6cd5\u3067\u3059\u3002\u30c1\u30a7\u30f3\u8a18\u6cd5\u3067\u306f\u9577\u65b9\u5f62\u3068\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001\u30af\u30ed\u30a6\u30ba\u30d5\u30c3\u30c8\u8a18\u6cd5\u3067\u306f\u9577\u65b9\u5f62\u3068\u7279\u5b9a\u306e\u7aef\u3092\u6301\u3064\u7dda\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u307b\u3068\u3093\u3069\u306e\u73fe\u4ee3\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30e2\u30c7\u30ea\u30f3\u30b0\u30c4\u30fc\u30eb\u306f\u3001\u30af\u30ed\u30a6\u30ba\u30d5\u30c3\u30c8\u8a18\u6cd5\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u5229\u7528\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u8a18\u53f7<\/th>\n<th>\u610f\u5473<\/th>\n<th>\u4f7f\u7528\u4f8b<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u9577\u65b9\u5f62<\/td>\n<td>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u8868\u3059<\/td>\n<td>\u30e9\u30d9\u30eb\u304c\u4ed8\u3044\u305f\u30dc\u30c3\u30af\u30b9<strong>\u5b66\u751f<\/strong><\/td>\n<\/tr>\n<tr>\n<td>\u6955\u5186<\/td>\n<td>\u5c5e\u6027\u3092\u8868\u3059<\/td>\n<td>\u63a5\u7d9a\u3055\u308c\u305f\u6955\u5186<strong>\u5b66\u751f<\/strong>\u30e9\u30d9\u30eb\u304c<strong>ID<\/strong><\/td>\n<\/tr>\n<tr>\n<td>\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9<\/td>\n<td>\u95a2\u4fc2\u3092\u8868\u3059<\/td>\n<td>\u63a5\u7d9a\u3059\u308b\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9<strong>\u5b66\u751f<\/strong>\u304a\u3088\u3073<strong>\u30b3\u30fc\u30b9<\/strong><\/td>\n<\/tr>\n<tr>\n<td>\u30af\u30ed\u30a6\u30ba\u30d5\u30c3\u30c8\u4ed8\u304d\u306e\u7dda<\/td>\n<td>\u300c\u591a\u6570\u300d\uff08M\uff09\u3092\u793a\u3059<\/td>\n<td>1\u4eba\u306e\u5b66\u751f\u304c\u591a\u6570\u306e\u30b3\u30fc\u30b9\u3092\u53d7\u8b1b\u3067\u304d\u308b<\/td>\n<\/tr>\n<tr>\n<td>\u5358\u4e00\u306e\u30bf\u30c3\u30af\u4ed8\u304d\u306e\u7dda<\/td>\n<td>\u300c1\u3064\u300d\u3092\u793a\u3059\uff081\uff09<\/td>\n<td>\u30b3\u30fc\u30b9\u306b\u306f1\u4eba\u306e\u30a4\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc\u304c\u3044\u308b<\/td>\n<\/tr>\n<tr>\n<td>\u5186<\/td>\n<td>\u4efb\u610f\u53c2\u52a0\u3092\u793a\u3059<\/td>\n<td>\u5b66\u751f\u306b\u306f\u307e\u3060\u5272\u308a\u5f53\u3066\u3089\u308c\u305fID\u304c\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u521d\u3081\u3066\u306eERD\u4f5c\u6210\u306e\u305f\u3081\u306e\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9 \ud83d\ude80<\/h2>\n<p>ERD\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u306f\u8ad6\u7406\u7684\u306a\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002\u6700\u7d42\u7684\u306a\u30b3\u30fc\u30c9\u3092\u77e5\u3089\u306a\u304f\u3066\u3082\u69cb\u3044\u307e\u305b\u3093\u3002\u30d3\u30b8\u30cd\u30b9\u8981\u4ef6\u3092\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5805\u56fa\u306a\u57fa\u76e4\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30b9\u30c6\u30c3\u30d7\u306b\u5f93\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>\u30b9\u30c6\u30c3\u30d71\uff1a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u7279\u5b9a\u3059\u308b \ud83d\udce6<\/h3>\n<p>\u6700\u521d\u306e\u30bf\u30b9\u30af\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u5185\u306e\u3059\u3079\u3066\u306e\u7570\u306a\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30ea\u30b9\u30c8\u30a2\u30c3\u30d7\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u30d3\u30b8\u30cd\u30b9\u8981\u4ef6\u66f8\u3092\u78ba\u8a8d\u3059\u308b\u304b\u3001\u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u306b\u30a4\u30f3\u30bf\u30d3\u30e5\u30fc\u3057\u3066\u540d\u8a5e\u3092\u898b\u3064\u3051\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u3089\u306e\u540d\u8a5e\u304c\u901a\u5e38\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u540d\u8a5e\u3092\u691c\u7d22\u3059\u308b\uff1a<\/strong> \u30e9\u30a4\u30d6\u30e9\u30ea\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3057\u3066\u3044\u308b\u5834\u5408\u3001Book\uff08\u672c\uff09\u3001Member\uff08\u4f1a\u54e1\uff09\u3001Loan\uff08\u8cb8\u51fa\uff09\u3001Fine\uff08\u7f70\u91d1\uff09\u306a\u3069\u306e\u5358\u8a9e\u3092\u63a2\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>\u95a2\u4fc2\u306e\u306a\u3044\u9805\u76ee\u3092\u9664\u5916\u3059\u308b\uff1a<\/strong> \u3059\u3079\u3066\u306e\u540d\u8a5e\u304c\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u3044\u3046\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305f\u3068\u3048\u3070<em>\u51e6\u7406<\/em> \u307e\u305f\u306f <em>\u78ba\u8a8d<\/em> \u306f\u901a\u5e38\u3001\u884c\u52d5\u3067\u3042\u308a\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<li><strong>\u7c92\u5ea6\u3092\u7d30\u304b\u304f\u4fdd\u3064\uff1a<\/strong> \u8907\u6570\u306e\u6982\u5ff5\u30921\u3064\u306e\u30dc\u30c3\u30af\u30b9\u306b\u307e\u3068\u3081\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u305f\u3068\u3048\u3070<em>CustomerAddress\uff08\u9867\u5ba2\u4f4f\u6240\uff09<\/em> \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u3001\u8907\u6570\u306e\u4f4f\u6240\u3092\u8ffd\u8de1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u3001\u6700\u7d42\u7684\u306b<em>\u9867\u5ba2<\/em> \u3068<em>Address\uff08\u4f4f\u6240\uff09<\/em> \u306b\u5206\u5272\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n<p><strong>\u4f8b\u306e\u30ea\u30b9\u30c8\uff1a<\/strong><\/p>\n<ul>\n<li>\u88fd\u54c1<\/li>\n<li>\u4ed5\u5165\u5148<\/li>\n<li>\u6ce8\u6587<\/li>\n<li>\u9867\u5ba2<\/li>\n<\/ul>\n<h3>\u30b9\u30c6\u30c3\u30d72\uff1a\u5c5e\u6027\u3092\u5b9a\u7fa9\u3059\u308b \ud83c\udff7\ufe0f<\/h3>\n<p>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u7279\u5b9a\u3055\u308c\u305f\u3089\u3001\u305d\u308c\u3089\u306b\u3064\u3044\u3066\u4fdd\u5b58\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u60c5\u5831\u306e\u5185\u5bb9\u3092\u6c7a\u5b9a\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u5c5e\u6027\u306f\u3001\u6700\u7d42\u7684\u306b\u4f5c\u6210\u3059\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30c6\u30fc\u30d6\u30eb\u306e\u5217\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\uff1a<\/strong>\u3059\u3079\u3066\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u306f\u4e00\u610f\u306e\u8b58\u5225\u5b50\u304c\u5fc5\u8981\u3067\u3059\u3002\u901a\u5e38\u306fID\u30d5\u30a3\u30fc\u30eb\u30c9\uff08\u4f8b\uff1a<code>CustomerID<\/code>, <code>ProductID<\/code>\uff09\u3067\u3059\u3002\u3059\u3079\u3066\u306e\u30ec\u30b3\u30fc\u30c9\u3067\u4e00\u610f\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u8a18\u8ff0\u5c5e\u6027\uff1a<\/strong>\u3053\u308c\u3089\u306f\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070<em>Product<\/em>\u306b\u3064\u3044\u3066\u306f\u3001<em>Name<\/em>, <em>Price<\/em>\u3001\u304a\u3088\u3073<em>StockQuantity<\/em>.<\/li>\n<li><strong>\u5916\u90e8\u30ad\u30fc\uff1a<\/strong>\u3053\u308c\u3089\u306f\u5f8c\u3067\u95a2\u4fc2\u6027\u306e\u30b9\u30c6\u30c3\u30d7\u3067\u7279\u5b9a\u3055\u308c\u307e\u3059\u304c\u3001\u30c7\u30fc\u30bf\u304c\u4ed6\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u30ea\u30f3\u30af\u3059\u308b\u5834\u6240\u3092\u30e1\u30e2\u3057\u3066\u304a\u3044\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n<p><strong>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/strong>\u8a08\u7b97\u3055\u308c\u305f\u5024\u3092\u5c5e\u6027\u3068\u3057\u3066\u4fdd\u5b58\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\uff08\u4f8b\uff1a<em>TotalPrice<\/em>\uff09\u3002\u5b9f\u884c\u6642\u306b\u8a08\u7b97\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u4e0d\u6574\u5408\u3092\u9632\u304e\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>\u30b9\u30c6\u30c3\u30d73\uff1a\u95a2\u4fc2\u6027\u3092\u6c7a\u5b9a\u3059\u308b \ud83d\udd17<\/h3>\n<p>\u4eca\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u3064\u306a\u304e\u307e\u3059\u3002\u3053\u306e\u30b9\u30c6\u30c3\u30d7\u3067\u30c7\u30fc\u30bf\u306e\u76f8\u4e92\u4f5c\u7528\u306e\u4ed5\u7d44\u307f\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u300c1\u4eba\u306e\u9867\u5ba2\u304c\u8907\u6570\u306e\u6ce8\u6587\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u308b\u304b\uff1f\u300d\u3084\u300c1\u3064\u306e\u6ce8\u6587\u304c\u8907\u6570\u306e\u9867\u5ba2\u306b\u5c5e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u304b\uff1f\u300d\u3068\u3044\u3063\u305f\u8cea\u554f\u3092\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u95a2\u9023\u3092\u7279\u5b9a\u3059\u308b\uff1a<\/strong>\u8981\u4ef6\u306e\u4e2d\u306e\u52d5\u8a5e\u3092\u63a2\u3057\u3066\u304f\u3060\u3055\u3044\u3002<em>\u5834\u6240<\/em>, <em>\u542b\u307e\u308c\u308b<\/em>, <em>\u4f9b\u7d66\u3059\u308b<\/em>.<\/li>\n<li><strong>\u65b9\u5411\u3092\u5b9a\u7fa9\u3059\u308b\uff1a<\/strong>\u95a2\u4fc2\u304c\u5358\u65b9\u5411\u304b\u53cc\u65b9\u5411\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n<li><strong>\u63a8\u79fb\u6027\u3092\u78ba\u8a8d\u3059\u308b\uff1a<\/strong>\u95a2\u4fc2\u304c\u76f4\u63a5\u7684\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002A\u304cB\u306b\u95a2\u4fc2\u3057\u3001B\u304cC\u306b\u95a2\u4fc2\u3059\u308b\u5834\u5408\u3001A\u304cC\u306b\u76f4\u63a5\u30ea\u30f3\u30af\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n<\/ul>\n<h3>\u30b9\u30c6\u30c3\u30d74\uff1a\u57fa\u6570\u3068\u53c2\u52a0\u5236\u7d04\u3092\u8a2d\u5b9a\u3059\u308b \ud83d\udccf<\/h3>\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\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u95a2\u4fc2\u3059\u308b\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u3002\u3053\u308c\u306f\u5916\u90e8\u30ad\u30fc\u5236\u7d04\u3092\u5b9a\u7fa9\u3059\u308b\u4e0a\u3067\u91cd\u8981\u3067\u3042\u308b\u3002<\/p>\n<h4>\u57fa\u6570\u306e\u7a2e\u985e<\/h4>\n<ul>\n<li><strong>1\u5bfe1 (1:1)\uff1a<\/strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3A\u306e1\u3064\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3B\u306e\u6b63\u78ba\u306b1\u3064\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u95a2\u4fc2\u3059\u308b\u3002\u4f8b\uff1a1\u4eba\u306e\u5f93\u696d\u54e1\u304c1\u679a\u306e\u5f93\u696d\u54e1\u30d0\u30c3\u30b8\u3092\u6301\u3064\u3002<\/li>\n<li><strong>1\u5bfe\u591a (1:N)\uff1a<\/strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3A\u306e1\u3064\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3B\u306e\u591a\u6570\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u95a2\u4fc2\u3059\u308b\u3002\u4f8b\uff1a1\u4eba\u306e\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u304c\u591a\u6570\u306e\u5f93\u696d\u54e1\u3092\u76e3\u7763\u3059\u308b\u3002<\/li>\n<li><strong>\u591a\u5bfe\u591a (M:N)\uff1a<\/strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3A\u306e\u591a\u6570\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3B\u306e\u591a\u6570\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u95a2\u4fc2\u3059\u308b\u3002\u4f8b\uff1a\u591a\u6570\u306e\u5b66\u751f\u304c\u591a\u6570\u306e\u6388\u696d\u306b\u767b\u9332\u3059\u308b\u3002<\/li>\n<\/ul>\n<h4>\u53c2\u52a0\u5236\u7d04<\/h4>\n<ul>\n<li><strong>\u5fc5\u9808\uff1a<\/strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u95a2\u4fc2\u306b\u53c2\u52a0\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u3059\u3079\u3066\u306e\u6ce8\u6587\u306b\u306f\u9867\u5ba2\u304c\u5b58\u5728\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/li>\n<li><strong>\u4efb\u610f\uff1a<\/strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u53c2\u52a0\u3057\u306a\u304f\u3066\u3082\u3088\u3044\u3002\u9867\u5ba2\u304c\u5e97\u982d\u3067\u306e\u652f\u6255\u3044\u306e\u307f\u306e\u5834\u5408\u3001\u914d\u9001\u5148\u4f4f\u6240\u3092\u6301\u305f\u306a\u3044\u3053\u3068\u3082\u3042\u308b\u3002<\/li>\n<\/ul>\n<p><strong>\u591a\u5bfe\u591a\u306b\u95a2\u3059\u308b\u6ce8\u610f\uff1a<\/strong>\u307b\u3068\u3093\u3069\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u3001\u591a\u5bfe\u591a\u95a2\u4fc2\u3092\u76f4\u63a5\u683c\u7d0d\u3067\u304d\u306a\u3044\u3002\u7d50\u5408\u30c6\u30fc\u30d6\u30eb\uff08\u307e\u305f\u306f\u30d6\u30ea\u30c3\u30b8\u30c6\u30fc\u30d6\u30eb\uff09\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3067\u89e3\u6c7a\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u5b66\u751f\u3068\u6388\u696d\u306e\u5834\u5408\u3001StudentID\u3068CourseID\u3092\u30ea\u30f3\u30af\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u3092\u300c<em>\u767b\u9332<\/em>\u300d\u3068\u3044\u3046\u540d\u524d\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3059\u308b\u3002<\/p>\n<h3>\u30b9\u30c6\u30c3\u30d75\uff1a\u898b\u76f4\u3057\u3068\u6b63\u898f\u5316 \ud83e\uddf9<\/h3>\n<p>\u63a5\u7d9a\u3092\u63cf\u3044\u305f\u5f8c\u306f\u3001\u56f3\u306e\u69cb\u9020\u4e0a\u306e\u6b20\u9665\u304c\u306a\u3044\u304b\u78ba\u8a8d\u3059\u308b\u3002\u6b63\u898f\u5316\u3068\u306f\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3092\u6e1b\u3089\u3057\u3001\u6574\u5408\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b\u30c7\u30fc\u30bf\u3092\u6574\u7406\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u3042\u308b\u3002<\/p>\n<ul>\n<li><strong>\u7b2c\u4e00\u6b63\u898f\u5f62 (1NF)\uff1a<\/strong>\u3059\u3079\u3066\u306e\u5217\u304c\u539f\u5b50\u5024\u3092\u542b\u3080\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u30021\u3064\u306e\u30bb\u30eb\u306b\u30ea\u30b9\u30c8\u3084\u914d\u5217\u3092\u542b\u3081\u306a\u3044\u3002<\/li>\n<li><strong>\u7b2c\u4e8c\u6b63\u898f\u5f62 (2NF):<\/strong> \u3059\u3079\u3066\u306e\u975e\u30ad\u30fc\u5c5e\u6027\u304c\u4e3b\u30ad\u30fc\u306b\u5b8c\u5168\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002\u90e8\u5206\u7684\u4f9d\u5b58\u95a2\u4fc2\u3092\u524a\u9664\u3059\u308b\u3002<\/li>\n<li><strong>\u7b2c\u4e09\u6b63\u898f\u5f62 (3NF):<\/strong> \u63a8\u79fb\u7684\u4f9d\u5b58\u95a2\u4fc2\u304c\u5b58\u5728\u3057\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002\u4ed6\u306e\u975e\u30ad\u30fc\u5c5e\u6027\u306b\u4f9d\u5b58\u3059\u308b\u5c5e\u6027\u3092\u524a\u9664\u3059\u308b\u3002<\/li>\n<\/ul>\n<p>\u307b\u3068\u3093\u3069\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f3NF\u3092\u8d85\u3048\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u8a2d\u8a08\u304c\u3053\u308c\u3089\u306e\u30eb\u30fc\u30eb\u306b\u5f93\u3063\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u7570\u5e38\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u907f\u3051\u308b\u3079\u304d\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74 \u26a0\ufe0f<\/h2>\n<p>\u7d4c\u9a13\u8c4a\u5bcc\u306a\u30c7\u30b6\u30a4\u30ca\u30fc\u3067\u3055\u3048\u30df\u30b9\u3092\u72af\u3057\u307e\u3059\u3002\u4e00\u822c\u7684\u306a\u8aa4\u308a\u306b\u6c17\u3065\u3044\u3066\u304a\u304f\u3053\u3068\u3067\u3001\u5f8c\u3067\u5927\u304d\u306a\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u56de\u907f\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u4e3b\u30ad\u30fc\u306e\u6b20\u843d\uff1a<\/strong> \u4e00\u610f\u306e\u8b58\u5225\u5b50\u306e\u306a\u3044\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30ec\u30b3\u30fc\u30c9\u306e\u66f4\u65b0\u3084\u524a\u9664\u304c\u307b\u307c\u4e0d\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u4e0d\u9069\u5207\u306a\u30c7\u30fc\u30bf\u578b\uff1a<\/strong> \u5c5e\u6027\u304c\u30c7\u30fc\u30bf\u3068\u4e00\u81f4\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002\u65e5\u4ed8\u3092\u30c6\u30ad\u30b9\u30c8\u3068\u3057\u3066\u4fdd\u5b58\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u30bb\u30f3\u30c8\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u4fa1\u683c\u3092\u6574\u6570\u3068\u3057\u3066\u4fdd\u5b58\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002<\/li>\n<li><strong>\u904e\u5270\u306a\u6b63\u898f\u5316\uff1a<\/strong> \u6b63\u898f\u5316\u306f\u826f\u3044\u3053\u3068\u3067\u3059\u304c\u3001\u30c6\u30fc\u30d6\u30eb\u304c\u591a\u3059\u304e\u308b\u3068\u30af\u30a8\u30ea\u304c\u9045\u304f\u306a\u308a\u3001\u8907\u96d1\u306b\u306a\u308a\u307e\u3059\u3002\u6574\u5408\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u306e\u533a\u5225\u3092\u7121\u8996\u3059\u308b\uff1a<\/strong> \u30b7\u30b9\u30c6\u30e0\u304c\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u65e9\u671f\u306b\u6c7a\u5b9a\u3059\u308b\u3002<em>email@domain.com<\/em> \u306f\u3001<em>EMAIL@DOMAIN.COM<\/em>.<\/li>\n<li><strong>\u30cf\u30fc\u30c9\u30b3\u30fc\u30c9\u3055\u308c\u305f\u5024\uff1a<\/strong> \u4f8b\u3048\u3070<code>1<\/code> \u3084<code>2<\/code> \u3068\u3044\u3063\u305f\u53c2\u7167\u30c6\u30fc\u30d6\u30eb\u306a\u3057\u3067\u4fdd\u5b58\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u30b9\u30c6\u30fc\u30bf\u30b9\u3068\u3057\u3066<em>\u6709\u52b9<\/em>, <em>\u7121\u52b9<\/em>, <em>\u4fdd\u7559\u4e2d<\/em>.<\/li>\n<\/ul>\n<h2>\u547d\u540d\u898f\u5247\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9 \ud83d\udcdd<\/h2>\n<p>\u547d\u540d\u306e\u4e00\u8cab\u6027\u306b\u3088\u308a\u3001ERD\u304a\u3088\u3073\u305d\u306e\u7d50\u679c\u3068\u3057\u3066\u5f97\u3089\u308c\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u3001\u95a2\u4fc2\u3059\u308b\u3059\u3079\u3066\u306e\u4eba\u306b\u3068\u3063\u3066\u8aad\u307f\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u6df7\u4e71\u3092\u62db\u304f\u540d\u524d\u306f\u3001\u30b3\u30fc\u30c9\u5185\u306e\u6df7\u4e71\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u5358\u6570\u540d\u8a5e\u3092\u4f7f\u7528\u3059\u308b\uff1a<\/strong> \u30c6\u30fc\u30d6\u30eb\u540d\u306f\u5358\u6570\u5f62\u3067 (\u4f8b\uff1a<em>Customer<\/em> \u3067\u306f\u306a\u304f <em>Customers<\/em>).<\/li>\n<li><strong>\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u3092\u4f7f\u7528\u3059\u308b\uff1a<\/strong> \u8aad\u307f\u3084\u3059\u304f\u3059\u308b\u305f\u3081\u306b\u5358\u8a9e\u306e\u9593\u306b\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u3092\u4f7f\u7528\u3059\u308b (\u4f8b\uff1a<code>customer_name<\/code> \u3067\u306f\u306a\u304f <code>customername<\/code>).<\/li>\n<li><strong>\u4e88\u7d04\u8a9e\u3092\u907f\u3051\u308b\uff1a<\/strong> \u4ee5\u4e0b\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u5909\u66f4\u305b\u305a\u306b\u30c6\u30fc\u30d6\u30eb\u540d\u3068\u3057\u3066\u4f7f\u7528\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\uff1a<em>Order<\/em>, <em>User<\/em>\u3001\u307e\u305f\u306f <em>Group<\/em> \u306f\u3001SQL\u69cb\u6587\u3068\u885d\u7a81\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u5909\u66f4\u305b\u305a\u306b\u30c6\u30fc\u30d6\u30eb\u540d\u3068\u3057\u3066\u4f7f\u7528\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>\u660e\u78ba\u306b\u8a18\u8ff0\u3059\u308b\uff1a<\/strong> \u660e\u78ba\u306a\u540d\u524d\u3092\u4f7f\u7528\u3059\u308b\u3002<code>cust_id<\/code> \u306f\u554f\u984c\u306a\u3044\u304c\u3001<code>customer_id<\/code> \u306e\u65b9\u304c\u660e\u78ba\u3055\u3092\u8003\u616e\u3059\u308b\u3068\u826f\u3044\u3067\u3059\u3002<\/li>\n<li><strong>\u63a5\u982d\u8f9e\u3092\u7d71\u4e00\u3059\u308b\uff1a<\/strong> \u7279\u5b9a\u306e\u30b9\u30ad\u30fc\u30de\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u3092\u7dad\u6301\u3057\u3066\u304f\u3060\u3055\u3044\uff08\u4f8b\uff1a<code>tbl_<\/code> \u307e\u305f\u306f <code>ref_<\/code>).<\/li>\n<\/ul>\n<h2>\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u306e\u53ef\u8996\u5316 \ud83d\udd04<\/h2>\n<p>\u56f3\u304c\u5b8c\u6210\u3057\u305f\u3089\u3001\u30c7\u30fc\u30bf\u304c\u30b7\u30b9\u30c6\u30e0\u5185\u3067\u3069\u306e\u3088\u3046\u306b\u79fb\u52d5\u3059\u308b\u304b\u3092\u53ef\u8996\u5316\u3057\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8ad6\u7406\u3092\u7406\u89e3\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u633f\u5165\uff1a<\/strong> \u65b0\u3057\u3044\u30c7\u30fc\u30bf\u306f\u4e3b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u3069\u306e\u3088\u3046\u306b\u5165\u529b\u3055\u308c\u307e\u3059\u304b\uff1f\uff08\u4f8b\uff1a\u65b0\u3057\u3044\u9867\u5ba2\u30ec\u30b3\u30fc\u30c9\uff09<\/li>\n<li><strong>\u66f4\u65b0\uff1a<\/strong> \u30c7\u30fc\u30bf\u306f\u3069\u306e\u3088\u3046\u306b\u66f4\u65b0\u3055\u308c\u307e\u3059\u304b\uff1f\uff08\u4f8b\uff1a\u4f4f\u6240\u306e\u5909\u66f4\uff09<\/li>\n<li><strong>\u524a\u9664\uff1a<\/strong> \u30ec\u30b3\u30fc\u30c9\u304c\u524a\u9664\u3055\u308c\u305f\u3068\u304d\u306b\u95a2\u9023\u30c7\u30fc\u30bf\u306f\u3069\u3046\u306a\u308a\u307e\u3059\u304b\uff1f\uff08\u4f8b\uff1a\u30ab\u30b9\u30b1\u30fc\u30c9\u524a\u9664 vs. \u5236\u9650\uff09<\/li>\n<li><strong>\u7167\u4f1a\uff1a<\/strong> \u30c7\u30fc\u30bf\u3092\u3069\u306e\u3088\u3046\u306b\u53d6\u5f97\u3057\u307e\u3059\u304b\uff1f\uff08\u4f8b\uff1aOrder\u30c6\u30fc\u30d6\u30eb\u3068Customer\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3059\u308b\uff09<\/li>\n<\/ul>\n<h2>\u56f3\u9762\u4f5c\u6210\u306e\u305f\u3081\u306e\u30c4\u30fc\u30eb \ud83d\udda5\ufe0f<\/h2>\n<p>\u7d19\u306b\u63cf\u304f\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u304c\u3001\u30c7\u30b8\u30bf\u30eb\u30c4\u30fc\u30eb\u306b\u306f\u30d0\u30fc\u30b8\u30e7\u30f3\u7ba1\u7406\u3084\u81ea\u52d5SQL\u751f\u6210\u306a\u3069\u306e\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u30c4\u30fc\u30eb\u3092\u9078\u629e\u3059\u308b\u969b\u306f\u3001\u6a19\u6e96\u7684\u306aERD\u8868\u8a18\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u6a5f\u80fd\u304c\u3042\u308b\u304b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n<li><strong>\u5171\u540c\u4f5c\u696d\uff1a<\/strong> \u8907\u6570\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u540c\u6642\u306b\u56f3\u3092\u7de8\u96c6\u3067\u304d\u307e\u3059\u304b\uff1f<\/li>\n<li><strong>\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\uff1a<\/strong> SQL\u30b9\u30af\u30ea\u30d7\u30c8\u3001PNG\u3001\u307e\u305f\u306fPDF\u306b\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u3067\u304d\u307e\u3059\u304b\uff1f<\/li>\n<li><strong>\u691c\u8a3c\uff1a<\/strong> \u30c4\u30fc\u30eb\u306f\u6b63\u898f\u5316\u30eb\u30fc\u30eb\u3084\u5faa\u74b0\u4f9d\u5b58\u95a2\u4fc2\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u304b\uff1f<\/li>\n<li><strong>\u7d71\u5408\uff1a<\/strong> \u65e2\u5b58\u306e\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u307e\u305f\u306f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u7ba1\u7406\u30c4\u30fc\u30eb\u3068\u7d71\u5408\u3067\u304d\u307e\u3059\u304b\uff1f<\/li>\n<\/ul>\n<h2>\u3088\u304f\u3042\u308b\u8cea\u554f \u2753<\/h2>\n<p>\u3053\u3053\u3067\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u3092\u59cb\u3081\u308b\u521d\u5fc3\u8005\u304c\u3088\u304f\u8cea\u554f\u3059\u308b\u4e00\u822c\u7684\u306a\u8cea\u554f\u306b\u5bfe\u3059\u308b\u56de\u7b54\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h3>1. ERD\u3092\u4f5c\u6210\u3059\u308b\u524d\u306bSQL\u3092\u77e5\u3063\u3066\u3044\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u3059\u304b\uff1f<\/h3>\n<p>\u3044\u3044\u3048\u3002ERD\u306f\u8a2d\u8a08\u30c4\u30fc\u30eb\u3067\u3059\u3002SQL\u3092\u66f8\u304b\u305a\u306b\u8ad6\u7406\u69cb\u9020\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u56f3\u9762\u306f\u3001\u6700\u7d42\u7684\u306b\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308bSQL\u3092\u7406\u89e3\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<h3>2. ERD\u306f\u5f8c\u3067\u5909\u66f4\u3067\u304d\u307e\u3059\u304b\uff1f<\/h3>\n<p>\u306f\u3044\u3001\u305f\u3060\u3057\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3079\u304d\u3067\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u30c7\u30fc\u30bf\u304c\u5165\u3063\u305f\u5f8c\u306bERD\u3092\u5909\u66f4\u3059\u308b\u3068\u3001\u8cbb\u7528\u304c\u304b\u304b\u308a\u3001\u30ea\u30b9\u30af\u3082\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002\u8a2d\u8a08\u3092\u30c7\u30d7\u30ed\u30a4\u306e\u524d\u306b\u5b8c\u6210\u3055\u305b\u308b\u306e\u304c\u6700\u3082\u826f\u3044\u3067\u3059\u3002<\/p>\n<h3>3. \u30ed\u30b8\u30ab\u30ebERD\u3068\u7269\u7406ERD\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n<ul>\n<li><strong>\u30ed\u30b8\u30ab\u30ebERD\uff1a<\/strong> 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