{"id":9991,"date":"2023-03-02T15:55:29","date_gmt":"2023-03-02T07:55:29","guid":{"rendered":"https:\/\/www.cybermedian.com\/ja\/mastering-entity-relationship-diagrams-a-comprehensive-guide-to-designing-effective-data-models\/"},"modified":"2026-04-20T09:11:35","modified_gmt":"2026-04-20T09:11:35","slug":"mastering-entity-relationship-diagrams-a-comprehensive-guide-to-designing-effective-data-models","status":"publish","type":"post","link":"https:\/\/www.cybermedian.com\/ja\/mastering-entity-relationship-diagrams-a-comprehensive-guide-to-designing-effective-data-models\/","title":{"rendered":"\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u306e\u7fd2\u5f97\uff1a\u52b9\u679c\u7684\u306a\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3092\u8a2d\u8a08\u3059\u308b\u305f\u3081\u306e\u5305\u62ec\u7684\u30ac\u30a4\u30c9"},"content":{"rendered":"<h2>I. \u5e8f\u8ad6<\/h2>\n<p>\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u304a\u3088\u3073\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306e\u4e16\u754c\u306b\u304a\u3044\u3066\u3001<a href=\"https:\/\/www.visual-paradigm.com\/guide\/data-modeling\/what-is-entity-relationship-diagram\/\">\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3<\/a>\uff08ERD\uff09\u306f\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u3066\u3044\u307e\u3059\u3002ERD\u306f\u3001\u30c7\u30fc\u30bf\u306e\u8996\u899a\u7684\u8868\u73fe\u3067\u3042\u308a\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u305d\u306e\u5c5e\u6027\u306e\u9593\u306e\u95a2\u4fc2\u3092\u8aac\u660e\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u8907\u96d1\u306a\u30b7\u30b9\u30c6\u30e0\u3092\u660e\u78ba\u304b\u3064\u7c21\u6f54\u306b\u30e2\u30c7\u30eb\u5316\u3057\u3001\u7570\u306a\u308b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u3069\u306e\u3088\u3046\u306b\u76f8\u4e92\u306b\u95a2\u9023\u3057\u3066\u3044\u308b\u304b\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306e\u65b9\u6cd5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001ERD\u306e\u5b9a\u7fa9\u3068\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u30d7\u30ed\u30bb\u30b9\u306b\u304a\u3051\u308b\u305d\u306e\u76ee\u7684\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u306e\u7d42\u4e86\u307e\u3067\u306b\u3001ERD\u3068\u306f\u4f55\u304b\u3001\u305d\u3057\u3066\u306a\u305c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306b\u304a\u3044\u3066\u4e0d\u53ef\u6b20\u306a\u30c4\u30fc\u30eb\u3067\u3042\u308b\u304b\u3092\u3088\u308a\u6df1\u304f\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><img alt=\"Entity Relationship Diagram (ERD)\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/01-entity-relationship-diagram.png\"\/><\/p>\n<h2>II. \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u306e\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6982\u5ff5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u52b9\u679c\u7684\u304b\u3064\u52b9\u7387\u7684\u306aERD\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u6e96\u5099\u304c\u6574\u3044\u307e\u3059\u3002<\/p>\n<p><strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3<\/strong>\u304a\u3088\u3073<strong>\u5c5e\u6027<\/strong>\u307e\u305a\u53d6\u308a\u4e0a\u3052\u308b\u6982\u5ff5\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u5c5e\u6027\u3067\u3059\u3002\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u306f\u3001\u30c7\u30fc\u30bf\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u4eba\u7269\u3001\u5834\u6240\u3001\u7269\u3001\u307e\u305f\u306f\u6982\u5ff5\u3092\u6307\u3057\u307e\u3059\u3002\u5c5e\u6027\u3068\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u95a2\u3059\u308b\u8ffd\u52a0\u60c5\u5831\u3092\u63d0\u4f9b\u3059\u308b\u7279\u5fb4\u3067\u3059\u3002ERD\u3067\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u9577\u65b9\u5f62\u3067\u8868\u3055\u308c\u3001\u5c5e\u6027\u306f\u6955\u5186\u3067\u8868\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><strong>\u95a2\u4fc2<\/strong>\u304a\u3088\u3073<strong>\u57fa\u6570<\/strong>\u6b21\u306b\u8aac\u660e\u3059\u308b\u6982\u5ff5\u306f\u3001\u95a2\u4fc2\u3068\u57fa\u6570\u3067\u3059\u3002\u95a2\u4fc2\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u3064\u306a\u304c\u308a\u3092\u8868\u3057\u3001\u57fa\u6570\u306f\u3001\u3042\u308b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u51fa\u73fe\u56de\u6570\u304c\u3001\u5225\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u51fa\u73fe\u56de\u6570\u3068\u3069\u306e\u3088\u3046\u306b\u95a2\u9023\u3057\u3066\u3044\u308b\u304b\u3092\u793a\u3057\u307e\u3059\u3002\u95a2\u4fc2\u306f\u3001ERD\u306b\u304a\u3044\u3066\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u7dda\u3067\u8868\u3055\u308c\u3001\u57fa\u6570\u306f\u7dda\u306e\u7aef\u306b\u914d\u7f6e\u3055\u308c\u305f\u8a18\u53f7\u306b\u3088\u3063\u3066\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><strong>\u30ad\u30fc<\/strong>\u304a\u3088\u3073<strong>\u8b58\u5225\u5b50<\/strong>\u6700\u5f8c\u306b\u53d6\u308a\u4e0a\u3052\u308b\u6982\u5ff5\u306f\u3001\u30ad\u30fc\u3068\u8b58\u5225\u5b50\u3067\u3059\u3002\u30ad\u30fc\u3068\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u5185\u306e\u5404\u30ec\u30b3\u30fc\u30c9\u3092\u4e00\u610f\u306b\u8b58\u5225\u3059\u308b\u305f\u3081\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u307e\u305f\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u6307\u3057\u307e\u3059\u3002\u8b58\u5225\u5b50\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u4e00\u610f\u306b\u8b58\u5225\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u7279\u5225\u306a\u7a2e\u985e\u306e\u30ad\u30fc\u3067\u3059\u3002ERD\u3067\u306f\u3001\u30ad\u30fc\u306f\u5c5e\u6027\u540d\u3092\u4e0b\u7dda\u3067\u56f2\u3093\u3067\u8868\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3089\u306eERD\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u6b63\u78ba\u306b\u8868\u73fe\u3059\u308b\u52b9\u679c\u7684\u304b\u3064\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u6e96\u5099\u304c\u6574\u3044\u307e\u3059\u3002<\/p>\n<div class=\"flex-1 overflow-hidden\">\n<div class=\"react-scroll-to-bottom--css-znmoj-79elbk h-full dark:bg-gray-800\">\n<div class=\"react-scroll-to-bottom--css-znmoj-1n7m0yu\">\n<div class=\"flex flex-col items-center text-sm dark:bg-gray-800\">\n<div class=\"w-full border-b border-black\/10 dark:border-gray-900\/50 text-gray-800 dark:text-gray-100 group bg-gray-50 dark:bg-[#444654]\">\n<div class=\"text-base gap-4 md:gap-6 m-auto md:max-w-2xl lg:max-w-2xl xl:max-w-3xl p-4 md:py-6 flex lg:px-0\">\n<div class=\"relative flex w-[calc(100%-50px)] flex-col gap-1 md:gap-3 lg:w-[calc(100%-115px)]\">\n<div class=\"flex flex-grow flex-col gap-3\">\n<div class=\"min-h-[20px] flex flex-col items-start gap-4 whitespace-pre-wrap\">\n<div class=\"markdown prose w-full break-words dark:prose-invert dark\">\n<h2>III. \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u306e\u7a2e\u985e<\/h2>\n<p>\u56f3 \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u306b\u306f\u3055\u307e\u3056\u307e\u306a\u7a2e\u985e\u304c\u3042\u308a\u3001\u305d\u308c\u305e\u308c\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u30d7\u30ed\u30bb\u30b9\u306b\u304a\u3044\u3066\u72ec\u81ea\u306e\u76ee\u7684\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001ERD\u306e\u4e3b\u306a3\u3064\u306e\u7a2e\u985e\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h3><strong>\u6982\u5ff5\u7684ERD<\/strong><\/h3>\n<p>\u6700\u521d\u306eERD\u306e\u7a2e\u985e\u306f\u6982\u5ff5\u7684ERD\u3067\u3059\u3002\u3053\u306e\u56f3\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5168\u4f53\u7684\u306a\u69cb\u9020\u3092\u5b9f\u88c5\u306e\u8a73\u7d30\u3092\u542b\u307e\u305a\u306b\u9ad8\u30ec\u30d9\u30eb\u3067\u30e2\u30c7\u30eb\u5316\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u6982\u5ff5\u7684ERD\u306e\u7126\u70b9\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u305d\u306e\u95a2\u4fc2\u306b\u3042\u308a\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u5c5e\u6027\u306b\u306f\u6ce8\u76ee\u3057\u307e\u305b\u3093\u3002\u3053\u306e\u30bf\u30a4\u30d7\u306eERD\u306f\u3001\u6280\u8853\u7684\u306a\u8a73\u7d30\u306b\u7cbe\u901a\u3057\u3066\u3044\u306a\u3044\u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5168\u4f53\u7684\u306a\u8a2d\u8a08\u3092\u4f1d\u3048\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<h4>\u6982\u5ff5\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u4f8b<\/h4>\n<div class=\"space-gap\"><\/div>\n<p><img alt=\"Conceptual data model\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/10-conceptual-data-model-example.png\"\/><\/p>\n<h3>\u8ad6\u7406\u7684ERD<\/h3>\n<p>2\u756a\u76ee\u306eERD\u306e\u7a2e\u985e\u306f\u8ad6\u7406\u7684ERD\u3067\u3059\u3002\u3053\u306e\u56f3\u306f\u6982\u5ff5\u7684ERD\u3088\u308a\u3082\u8a73\u7d30\u3092\u542b\u307f\u307e\u3059\u304c\u3001\u5b9f\u88c5\u306e\u8a73\u7d30\u306f\u542b\u307f\u307e\u305b\u3093\u3002\u8ad6\u7406\u7684ERD\u306e\u7126\u70b9\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u305d\u306e\u5c5e\u6027\u3001\u304a\u3088\u3073\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u306b\u3042\u308a\u307e\u3059\u3002\u8ad6\u7406\u7684ERD\u306f\u3001\u5b9f\u88c5\u6bb5\u968e\u306b\u8fd1\u3044\u30ec\u30d9\u30eb\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u304c\u3001\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u306b\u4f9d\u5b58\u3057\u306a\u3044\u62bd\u8c61\u7684\u306a\u30ec\u30d9\u30eb\u3092\u7dad\u6301\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h4>\u8ad6\u7406\u7684\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u4f8b<\/h4>\n<div class=\"space-gap\"><\/div>\n<p><img alt=\"Logical data model\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/11-logical-data-model-example.png\"\/><\/p>\n<h3>\u7269\u7406\u7684ERD<\/h3>\n<p>3\u756a\u76ee\u306eERD\u306e\u7a2e\u985e\u306f\u7269\u7406\u7684ERD\u3067\u3059\u3002\u3053\u306e\u56f3\u306f\u3001\u5b9f\u88c5\u306e\u8a73\u7d30\u3092\u542b\u3080\u30ec\u30d9\u30eb\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u7269\u7406\u7684ERD\u306b\u306f\u3001\u5c5e\u6027\u306e\u30c7\u30fc\u30bf\u578b\u3084\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u306e\u5236\u7d04\u306a\u3069\u3001\u4f7f\u7528\u3057\u3066\u3044\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308b\u60c5\u5831\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u7269\u7406\u7684ERD\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5b9f\u969b\u306e\u5b9f\u88c5\u3092\u30ac\u30a4\u30c9\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u7269\u7406\u30b9\u30ad\u30fc\u30de\u3068\u5bc6\u63a5\u306b\u95a2\u9023\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u9069\u5207\u306aERD\u306e\u7a2e\u985e\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u30d7\u30ed\u30bb\u30b9\u306e\u6210\u529f\u306b\u3068\u3063\u3066\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002\u8a2d\u8a08\u30d7\u30ed\u30bb\u30b9\u306e\u6bb5\u968e\u306b\u3088\u3063\u3066\u306f\u3001\u4ed6\u306eERD\u3088\u308a\u3082\u7279\u5b9a\u306e\u7a2e\u985e\u306eERD\u304c\u3088\u308a\u9069\u3057\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h4>\u7269\u7406\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u4f8b<\/h4>\n<p><img alt=\"Physical data model\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/12-physical-data-model-example.png\"\/><\/p>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u3092\u59cb\u3081\u305f\u3070\u304b\u308a\u306e\u5834\u5408\u306f\u3001\u6982\u5ff5\u7684ERD\u304b\u3089\u59cb\u3081\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u3053\u306e\u30bf\u30a4\u30d7\u306e\u56f3\u306f\u3001\u5b9f\u88c5\u306e\u8a73\u7d30\u306b\u5dfb\u304d\u8fbc\u307e\u308c\u308b\u3053\u3068\u306a\u304f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u305d\u306e\u95a2\u4fc2\u306e\u9ad8\u30ec\u30d9\u30eb\u306a\u8996\u70b9\u3092\u5f97\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u8a2d\u8a08\u30d7\u30ed\u30bb\u30b9\u304c\u9032\u3080\u306b\u3064\u308c\u3066\u3001\u8ad6\u7406\u7684ERD\u306f\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u305d\u306e\u5c5e\u6027\u306e\u8a73\u7d30\u3092\u660e\u78ba\u306b\u3057\u3001\u305d\u308c\u3089\u306e\u95a2\u4fc2\u3092\u6d17\u7df4\u3055\u305b\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u8ad6\u7406\u69cb\u9020\u3092\u5341\u5206\u306b\u7406\u89e3\u3057\u305f\u5f8c\u306f\u3001\u7269\u7406\u7684ERD\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5b9f\u969b\u306e\u5b9f\u88c5\u3092\u30ac\u30a4\u30c9\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30bf\u30a4\u30d7\u306e\u56f3\u306b\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u9069\u5207\u306b\u69cb\u7bc9\u3055\u308c\u3001\u610f\u56f3\u3057\u305f\u901a\u308a\u306b\u6a5f\u80fd\u3059\u308b\u305f\u3081\u306e\u91cd\u8981\u306a\u5b9f\u88c5\u306e\u8a73\u7d30\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n<p>\u7d50\u5c40\u306e\u3068\u3053\u308d\u3001\u9078\u629e\u3059\u308bERD\u306e\u7a2e\u985e\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u30d7\u30ed\u30bb\u30b9\u306e\u6bb5\u968e\u3068\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u5177\u4f53\u7684\u306a\u30cb\u30fc\u30ba\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u3055\u307e\u3056\u307e\u306a\u7a2e\u985e\u306eERD\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u7279\u5b9a\u306e\u30cb\u30fc\u30ba\u306b\u9069\u3057\u305f\u9069\u5207\u306a\u30bf\u30a4\u30d7\u3092\u9078\u629e\u3057\u3001\u52b9\u679c\u7684\u3067\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3092\u4f5c\u6210\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<section data-magellan-target=\"erd-examples\" id=\"erd-examples-movie-rental-system\">\n<h3>ERD\u306e\u4f8b \u2013 \u6620\u753b\u30ec\u30f3\u30bf\u30eb\u30b7\u30b9\u30c6\u30e0<\/h3>\n<div class=\"space-gap\"><\/div>\n<p><img alt=\"ERD example - Movie Rental System\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/13-erd-example-movie-rental-system.png\"\/><\/p>\n<div class=\"space-gap-large\"><\/div>\n<\/section>\n<section data-magellan-target=\"erd-examples\" id=\"erd-examples-loan-system\">\n<h3>ERD\u306e\u4f8b \u2013 \u8cb8\u4ed8\u30b7\u30b9\u30c6\u30e0<\/h3>\n<div class=\"space-gap\"><\/div>\n<p><img alt=\"ERD example - Loan System\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/14-erd-example-loan-system.png\"\/><\/p>\n<div class=\"space-gap-large\"><\/div>\n<\/section>\n<section data-magellan-target=\"erd-examples\" id=\"erd-examples-online-shop\">\n<h3>ERD\u306e\u4f8b \u2013 \u30aa\u30f3\u30e9\u30a4\u30f3\u30b7\u30e7\u30c3\u30d7<\/h3>\n<div class=\"space-gap\"><\/div>\n<p><img alt=\"ERD example - Online Shop\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/15-erd-example-online-shop.png\"\/><\/p>\n<\/section>\n<h2>IV. \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u3092\u4f5c\u6210\u3059\u308b\u624b\u9806<\/h2>\n<p>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306b\u304a\u3051\u308b\u91cd\u8981\u306a\u30b9\u30c6\u30c3\u30d7\u3067\u3059\u3002ERD\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u304a\u3088\u3073\u305d\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u5c5e\u6027\u3092\u8996\u899a\u7684\u306b\u8868\u73fe\u3057\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306e\u30d6\u30eb\u30fc\u30d7\u30ea\u30f3\u30c8\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u3092\u4f5c\u6210\u3059\u308b\u624b\u9806\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u7279\u5b9a\u3059\u308b<\/strong> \u2013 ERD\u3092\u4f5c\u6210\u3059\u308b\u6700\u521d\u306e\u30b9\u30c6\u30c3\u30d7\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u30b7\u30b9\u30c6\u30e0\u5185\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u6982\u5ff5\u3092\u6307\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u5927\u5b66\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u5b66\u751f\u3001\u6388\u696d\u3001\u6559\u54e1\u306a\u3069\u304c\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u5c5e\u6027\u3092\u5b9a\u7fa9\u3059\u308b<\/strong> \u2013 \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u7279\u5b9a\u3057\u305f\u5f8c\u3001\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u5404\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u5c5e\u6027\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u5c5e\u6027\u3068\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3059\u308b\u5fc5\u8981\u306e\u3042\u308b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u7279\u5fb4\u3092\u6307\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u5b66\u751f\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u5c5e\u6027\u306b\u306f\u3001\u6c0f\u540d\u3001\u751f\u5e74\u6708\u65e5\u3001\u5b66\u751fID\u306a\u3069\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u95a2\u4fc2\u3092\u6c7a\u5b9a\u3059\u308b<\/strong> \u2013 \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u305d\u306e\u5c5e\u6027\u3092\u5b9a\u7fa9\u3057\u305f\u5f8c\u3001\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u95a2\u4fc2\u3068\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u3069\u306e\u3088\u3046\u306b\u76f8\u4e92\u306b\u63a5\u7d9a\u3055\u308c\u3066\u3044\u308b\u304b\u3092\u8868\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u5927\u5b66\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u5b66\u751f\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u6388\u696d\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u9593\u306b\u3001\u5b66\u751f\u304c\u3069\u306e\u6388\u696d\u306b\u767b\u9332\u3057\u3066\u3044\u308b\u304b\u3092\u793a\u3059\u95a2\u4fc2\u304c\u3042\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u57fa\u6570\u3068\u30e2\u30c0\u30ea\u30c6\u30a3\u3092\u8a2d\u5b9a\u3059\u308b<\/strong> \u2013 \u95a2\u4fc2\u304c\u6c7a\u5b9a\u3055\u308c\u305f\u5f8c\u306f\u3001\u95a2\u4fc2\u306e\u57fa\u6570\u3068\u30e2\u30c0\u30ea\u30c6\u30a3\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u57fa\u6570\u306f\u3001\u3042\u308b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u51fa\u73fe\u56de\u6570\u304c\u3001\u5225\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u51fa\u73fe\u56de\u6570\u3068\u3069\u306e\u3088\u3046\u306b\u95a2\u9023\u3057\u3066\u3044\u308b\u304b\u3092\u8868\u3057\u307e\u3059\u3002\u30e2\u30c0\u30ea\u30c6\u30a3\u306f\u3001\u95a2\u4fc2\u304c\u30aa\u30d7\u30b7\u30e7\u30f3\u304b\u5fc5\u9808\u304b\u3092\u793a\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u5b66\u751f-\u6388\u696d\u306e\u95a2\u4fc2\u3067\u306f\u3001\u57fa\u6570\u304c1\u5bfe\u591a\u3067\u3042\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u3053\u308c\u306f1\u4eba\u306e\u5b66\u751f\u304c\u8907\u6570\u306e\u6388\u696d\u3092\u53d7\u8b1b\u3067\u304d\u30011\u3064\u306e\u6388\u696d\u306b\u8907\u6570\u306e\u5b66\u751f\u304c\u767b\u9332\u3067\u304d\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u30e2\u30c0\u30ea\u30c6\u30a3\u304c\u6388\u696d\u5074\u3067\u5fc5\u9808\u3067\u3042\u308b\u5834\u5408\u3001\u6388\u696d\u306b\u306f\u5c11\u306a\u304f\u3068\u30821\u4eba\u306e\u5b66\u751f\u304c\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308b\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u4e3b\u30ad\u30fc\u3092\u7279\u5b9a\u3059\u308b<\/strong> \u2013 \u6700\u5f8c\u306b\u3001\u5404\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u4e3b\u30ad\u30fc\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u4e3b\u30ad\u30fc\u306f\u3001\u5404\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u4ed6\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u533a\u5225\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u4e00\u610f\u306e\u8b58\u5225\u5b50\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u5b66\u751f\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3067\u306f\u3001\u4e3b\u30ad\u30fc\u3068\u3057\u3066\u5b66\u751fID\u304c\u4f7f\u7528\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u3053\u308c\u3089\u306e\u624b\u9806\u3092\u5b9f\u65bd\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u6b63\u78ba\u306b\u8868\u73fe\u3067\u304d\u308b\u9ad8\u54c1\u8cea\u3067\u52b9\u679c\u7684\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u3092\u8a2d\u8a08\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>V. \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<p>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u306f\u8907\u96d1\u306a\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u304c\u3001\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u5f93\u3046\u3053\u3068\u3067\u3001\u56f3\u304c\u52b9\u679c\u7684\u3067\u6b63\u78ba\u304b\u3064\u7406\u89e3\u3057\u3084\u3059\u3044\u3082\u306e\u306b\u306a\u308b\u3088\u3046\u306b\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001ERD\u3092\u4f5c\u6210\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\u3068\u306a\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3067\u3059\u3002<\/p>\n<ol>\n<li><strong>\u660e\u78ba\u3067\u7c21\u6f54\u306a\u30e9\u30d9\u30eb\u3092\u4f7f\u7528\u3059\u308b<\/strong> \u2013 \u30e9\u30d9\u30eb\u306fERD\u306e\u91cd\u8981\u306a\u69cb\u6210\u8981\u7d20\u3067\u3042\u308a\u3001\u56f3\u304c\u7406\u89e3\u3057\u3084\u3059\u3044\u3088\u3046\u306b\u660e\u78ba\u3067\u7c21\u6f54\u306a\u30e9\u30d9\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u306b\u99b4\u67d3\u307f\u306e\u306a\u3044\u4eba\u306b\u3068\u3063\u3066\u6df7\u4e71\u3092\u62db\u304f\u53ef\u80fd\u6027\u306e\u3042\u308b\u5c02\u9580\u7528\u8a9e\u3084\u904e\u5ea6\u306b\u8907\u96d1\u306a\u7528\u8a9e\u306f\u907f\u3051\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<li><strong>\u904e\u5270\u306a\u60c5\u5831\u306e\u8a70\u3081\u8fbc\u307f\u3092\u907f\u3051\u308b<\/strong> \u2013 \u904e\u5ea6\u306b\u591a\u304f\u306e\u60c5\u5831\u3092ERD\u306b\u8a70\u3081\u8fbc\u3080\u3053\u3068\u306f\u907f\u3051\u307e\u3057\u3087\u3046\u3002\u4ee3\u308f\u308a\u306b\u3001\u6700\u3082\u91cd\u8981\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u95a2\u4fc2\u306b\u6ce8\u76ee\u3057\u3001\u30b0\u30eb\u30fc\u30d7\u5316\u3084\u30af\u30e9\u30b9\u30bf\u30ea\u30f3\u30b0\u3092\u6d3b\u7528\u3057\u3066\u60c5\u5831\u3092\u6574\u7406\u3057\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u56f3\u306e\u8aad\u307f\u3084\u3059\u3055\u3068\u7406\u89e3\u306e\u3057\u3084\u3059\u3055\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u4e00\u8cab\u3057\u305f\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b<\/strong> \u2013 ERD\u3092\u4f5c\u6210\u3059\u308b\u969b\u306b\u306f\u3001\u4e00\u8cab\u3057\u305f\u8a18\u6cd5\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u56f3\u306e\u6b63\u78ba\u6027\u3068\u7406\u89e3\u306e\u3057\u3084\u3059\u3055\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002\u56f3\u5168\u4f53\u3067\u540c\u3058\u8a18\u6cd5\u3092\u4f7f\u7528\u3057\u3001\u4ed6\u306e\u56f3\u3084\u6587\u66f8\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u8a18\u6cd5\u3068\u6574\u5408\u6027\u3092\u6301\u305f\u305b\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<li><strong>\u691c\u8a3c\u3068\u78ba\u8a8d\u3092\u884c\u3046<\/strong> \u2013 ERD\u3092\u4f5c\u6210\u3057\u305f\u5f8c\u306f\u3001\u305d\u306e\u56f3\u304c\u6b63\u78ba\u3067\u3042\u308a\u3001\u30e2\u30c7\u30eb\u5316\u3055\u308c\u3066\u3044\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u6b63\u3057\u304f\u53cd\u6620\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u3001\u691c\u8a3c\u3068\u691c\u8a3c\u3092\u884c\u3046\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u306b\u306f\u3001\u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u3068\u56f3\u3092\u30ec\u30d3\u30e5\u30fc\u3057\u305f\u308a\u3001\u4ed6\u306e\u6587\u66f8\u3068\u7167\u5408\u3057\u305f\u308a\u3001\u671f\u5f85\u901a\u308a\u306b\u6a5f\u80fd\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u30c6\u30b9\u30c8\u3092\u884c\u3046\u3053\u3068\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u5f93\u3046\u3053\u3068\u3067\u3001\u30b7\u30b9\u30c6\u30e0\u5185\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u6b63\u78ba\u306b\u8868\u73fe\u3059\u308b\u9ad8\u54c1\u8cea\u3067\u6b63\u78ba\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u56f3\u306e\u660e\u78ba\u3055\u3068\u7406\u89e3\u3057\u3084\u3059\u3055\u304c\u5411\u4e0a\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u6b63\u78ba\u6027\u3068\u4fe1\u983c\u6027\u3082\u78ba\u4fdd\u3055\u308c\u307e\u3059\u3002\u5168\u4f53\u3068\u3057\u3066\u3001\u3053\u308c\u3089\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306b\u5f93\u3046\u3053\u3068\u3067\u3001\u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u306e\u30cb\u30fc\u30ba\u3092\u6e80\u305f\u3059\u52b9\u679c\u7684\u3067\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306e\u4f5c\u6210\u3092\u652f\u63f4\u3057\u307e\u3059\u3002<\/p>\n<div class=\"flex-1 overflow-hidden\">\n<div class=\"react-scroll-to-bottom--css-ypbly-79elbk h-full dark:bg-gray-800\">\n<div class=\"react-scroll-to-bottom--css-ypbly-1n7m0yu\">\n<div class=\"flex flex-col items-center text-sm dark:bg-gray-800\">\n<div class=\"w-full border-b border-black\/10 dark:border-gray-900\/50 text-gray-800 dark:text-gray-100 group bg-gray-50 dark:bg-[#444654]\">\n<div class=\"text-base gap-4 md:gap-6 m-auto md:max-w-2xl lg:max-w-2xl xl:max-w-3xl p-4 md:py-6 flex lg:px-0\">\n<div class=\"relative flex w-[calc(100%-50px)] flex-col gap-1 md:gap-3 lg:w-[calc(100%-115px)]\">\n<div class=\"flex flex-grow flex-col gap-3\">\n<div class=\"min-h-[20px] flex flex-col items-start gap-4 whitespace-pre-wrap\">\n<div class=\"markdown prose w-full break-words dark:prose-invert dark\">\n<h2>VI. \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u4f5c\u6210\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u8ab2\u984c<\/h2>\n<p>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u306f\u96e3\u3057\u3044\u4f5c\u696d\u3067\u3042\u308a\u3001\u30d7\u30ed\u30bb\u30b9\u4e2d\u306b\u3044\u304f\u3064\u304b\u306e\u4e00\u822c\u7684\u306a\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306b\u306f\u4ee5\u4e0b\u304c\u542b\u307e\u308c\u307e\u3059\uff1a<\/p>\n<ol>\n<li><strong>\u60c5\u5831\u306e\u4e0d\u5b8c\u5168\u3055\u307e\u305f\u306f\u4e0d\u6b63\u78ba\u3055<\/strong> \u2013 ERD\u4f5c\u6210\u306b\u304a\u3051\u308b\u6700\u5927\u306e\u8ab2\u984c\u306e\u4e00\u3064\u306f\u3001\u60c5\u5831\u306e\u4e0d\u5b8c\u5168\u3055\u307e\u305f\u306f\u4e0d\u6b63\u78ba\u3055\u3067\u3059\u3002\u5b8c\u5168\u3067\u6b63\u78ba\u306a\u30c7\u30fc\u30bf\u304c\u306a\u3051\u308c\u3070\u3001\u6b63\u78ba\u3067\u52b9\u679c\u7684\u306aERD\u3092\u4f5c\u6210\u3059\u308b\u306e\u306f\u96e3\u3057\u3044\u3067\u3057\u3087\u3046\u3002<\/li>\n<li><strong>\u30c7\u30fc\u30bf\u306e\u4e0d\u6574\u5408<\/strong> \u2013 \u30c7\u30fc\u30bf\u306e\u4e0d\u6574\u5408\u3082\u3001ERD\u4f5c\u6210\u306b\u304a\u3044\u3066\u8ab2\u984c\u3068\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u306f\u3001\u547d\u540d\u898f\u5247\u3001\u30c7\u30fc\u30bf\u578b\u3001\u30c7\u30fc\u30bf\u5f62\u5f0f\u306e\u4e0d\u6574\u5408\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u4e0d\u6574\u5408\u306f\u3001\u6b63\u78ba\u3067\u52b9\u679c\u7684\u306aERD\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3092\u96e3\u3057\u304f\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u8907\u96d1\u306a\u95a2\u4fc2<\/strong> \u2013 \u5927\u898f\u6a21\u3067\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u6271\u3046\u5834\u5408\u3001ERD\u306f\u975e\u5e38\u306b\u8907\u96d1\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u8907\u96d1\u3055\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u6b63\u78ba\u306b\u8868\u73fe\u3059\u308b\u3053\u3068\u3092\u96e3\u3057\u304f\u3057\u3001ERD\u306b\u8aa4\u308a\u3092\u751f\u3058\u3055\u305b\u308b\u539f\u56e0\u3068\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n<h2>VII. \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u4f5c\u6210\u306e\u305f\u3081\u306e\u30c4\u30fc\u30eb<\/h2>\n<p>ERD\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u30c4\u30fc\u30eb\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u3001\u30d7\u30ed\u30bb\u30b9\u3092\u7c21\u7d20\u5316\u3057\u3001\u3044\u304f\u3064\u304b\u306e\u8ab2\u984c\u3092\u514b\u670d\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u6700\u3082\u4eba\u6c17\u306e\u3042\u308b\u30c4\u30fc\u30eb\u306b\u306f\u4ee5\u4e0b\u304c\u542b\u307e\u308c\u307e\u3059\uff1a<\/p>\n<ol>\n<li><strong>Microsoft Visio<\/strong>\u306f\u3001ERD\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u308b\u4eba\u6c17\u306e\u3042\u308b\u56f3\u4f5c\u6210\u30c4\u30fc\u30eb\u3067\u3059\u3002\u6b63\u78ba\u3067\u52b9\u679c\u7684\u306aERD\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u308b\u3055\u307e\u3056\u307e\u306a\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3084\u56f3\u5f62\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<li><a href=\"https:\/\/online.visual-paradigm.com\/diagrams\/features\/erd-tool\/\"><strong>Visual Paradigm Online<\/strong><\/a>\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304cERD\u3084\u305d\u306e\u4ed6\u306e\u7a2e\u985e\u306e\u56f3\u3092\u751f\u6210\u3067\u304d\u308b\u30a6\u30a7\u30d6\u30d9\u30fc\u30b9\u306e\u30c4\u30fc\u30eb\u3067\u3059\u3002\u6b63\u78ba\u3067\u52b9\u679c\u7684\u306aERD\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u308b\u3055\u307e\u3056\u307e\u306a\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3084\u56f3\u5f62\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<li><a href=\"http:\/\/ER Diagram (ERD) Tool\"><strong>Visual Paradigm Desktop<\/strong><\/a>\u306f\u3001\u6b63\u78ba\u3067\u52b9\u679c\u7684\u306aERD\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u5e45\u5e83\u3044\u6a5f\u80fd\u3068\u30c4\u30fc\u30eb\u3092\u63d0\u4f9b\u3059\u308b\u4eba\u6c17\u3067\u5f37\u529b\u306aERD\u30c4\u30fc\u30eb\u3067\u3059\u3002\u4f7f\u3044\u3084\u3059\u3044\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3001\u591a\u69d8\u306a\u56f3\u4f5c\u6210\u30c4\u30fc\u30eb\u3068\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u5099\u3048\u3066\u304a\u308a\u3001ERD\u304b\u3089\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u3092\u751f\u6210\u3067\u304d\u308b\u6a5f\u80fd\u3082\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u65e2\u5b58\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089ERD\u306e\u30ea\u30d0\u30fc\u30b9\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u308a\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u7406\u89e3\u3057\u3084\u3059\u304f\u3057\u3066\u3044\u307e\u3059\u3002\u5168\u4f53\u3068\u3057\u3066\u3001Visual Paradigm\u306fERD\u4f5c\u6210\u306b\u9069\u3057\u305f\u5805\u7262\u3067\u52b9\u7387\u7684\u306a\u30c4\u30fc\u30eb\u3067\u3042\u308a\u3001\u305d\u306e\u6a5f\u80fd\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u5c02\u9580\u5bb6\u306b\u3068\u3063\u3066\u975e\u5e38\u306b\u512a\u308c\u305f\u9078\u629e\u80a2\u3067\u3059\u3002<\/li>\n<\/ol>\n<p>\u3053\u308c\u3089\u306e\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3001ERD\u4f5c\u6210\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u8ab2\u984c\u306b\u6ce8\u610f\u3092\u6255\u3046\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u6b63\u78ba\u306b\u8868\u73fe\u3059\u308b\u6b63\u78ba\u3067\u52b9\u679c\u7684\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n<h2>VIII. \u7d50\u8ad6<\/h2>\n<p>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u4f5c\u6210\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u3068\u7ba1\u7406\u306b\u304a\u3051\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u6b63\u78ba\u306b\u8868\u73fe\u3059\u308b\u3053\u3068\u3067\u3001ERD\u306f\u30c7\u30fc\u30bf\u304c\u6574\u7406\u3055\u308c\u3001\u6b63\u78ba\u3067\u30a2\u30af\u30bb\u30b9\u3057\u3084\u3059\u3044\u72b6\u614b\u3092\u4fdd\u3064\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u672c\u30ac\u30a4\u30c9\u3067\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u5c5e\u6027\u3001\u95a2\u4fc2\u3068\u57fa\u6570\u3001\u30ad\u30fc\u3068\u8b58\u5225\u5b50\u3068\u3044\u3063\u305fERD\u306e\u4e3b\u8981\u306a\u6982\u5ff5\u306b\u3064\u3044\u3066\u691c\u8a0e\u3057\u307e\u3057\u305f\u3002\u307e\u305f\u3001ERD\u306e\u7a2e\u985e\u3001ERD\u4f5c\u6210\u306e\u624b\u9806\u3001\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3001\u4e00\u822c\u7684\u306a\u8ab2\u984c\u3001ERD\u4f5c\u6210\u306e\u305f\u3081\u306e\u30c4\u30fc\u30eb\u306b\u3064\u3044\u3066\u3082\u8aac\u660e\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u6b63\u78ba\u3067\u52b9\u679c\u7684\u306aERD\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u306f\u96e3\u3057\u3044\u8ab2\u984c\u3067\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u5f93\u3044\u3001\u5229\u7528\u53ef\u80fd\u306a\u30c4\u30fc\u30eb\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u6b63\u78ba\u306b\u8868\u73fe\u3059\u308bERD\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>ERD\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u3068\u7ba1\u7406\u306b\u304a\u3051\u308b\u4e0d\u53ef\u6b20\u306a\u30c4\u30fc\u30eb\u3067\u3042\u308a\u3001\u305d\u306e\u4f5c\u6210\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5c02\u9580\u5bb6\u306b\u3068\u3063\u3066\u91cd\u8981\u3067\u3059\u3002\u672c\u30ac\u30a4\u30c9\u3067\u63d0\u793a\u3055\u308c\u305f\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u5f93\u3046\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3092\u6b63\u78ba\u306b\u8868\u73fe\u3059\u308bERD\u3092\u4f5c\u6210\u3067\u304d\u3001\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u7ba1\u7406\u3068\u5206\u6790\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n<h2>ERD\u306e\u53c2\u8003\u6587\u732e\uff1a<\/h2>\n<ul>\n<li>Connolly, T., &amp; Begg, C. (2014). <a href=\"https:\/\/www.amazon.com\/Database-Systems-Practical-Implementation-Management\/dp\/0132943263\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b7\u30b9\u30c6\u30e0\uff1a\u8a2d\u8a08\u30fb\u5b9f\u88c5\u30fb\u7ba1\u7406\u306e\u5b9f\u8df5\u7684\u30a2\u30d7\u30ed\u30fc\u30c1\uff086\u7248\uff09\u3002<\/a><\/li>\n<li>Elmasri, R., &amp; Navathe, S. B. (2016). <a href=\"https:\/\/www.amazon.com\/s?k=Fundamentals+of+Database+Systems&amp;i=stripbooks-intl-ship&amp;crid=O9AMPMVJ7EJM&amp;sprefix=fundamentals+of+database+systems%2Cstripbooks-intl-ship%2C351&amp;ref=nb_sb_noss_1\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b7\u30b9\u30c6\u30e0\u306e\u57fa\u790e<\/a>\uff087\u7248\uff09\u3002<\/li>\n<li>Microsoft Visio. \u53d6\u5f97\u5143\uff1a<a href=\"https:\/\/support.microsoft.com\/en-us\/office\/create-an-entity-relationship-diagram-00fc20da-3bd1-476c-a3d3-f3086eabdd5b\" rel=\"noopener\" target=\"_new\">https:\/\/support.microsoft.com\/en-us\/office\/create-an-entity-relationship-diagram-00fc20da-3bd1-476c-a3d3-f3086eabdd5b<\/a>.<\/li>\n<li><a href=\"https:\/\/www.visual-paradigm.com\/guide\/data-modeling\/what-is-entity-relationship-diagram\/\">\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/a><\/li>\n<li><a href=\"https:\/\/www.visual-paradigm.com\/guide\/data-modeling\/what-is-data-modeling\/\">\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/a><\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<\/div>\n<\/div>\n<div class=\"flex justify-between\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"markdown prose w-full break-words dark:prose-invert dark\">\n<p>\u00a0<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"flex justify-between\">\n<div class=\"text-gray-400 flex self-end lg:self-center justify-center mt-2 gap-3 md:gap-4 lg:gap-1 lg:absolute lg:top-0 lg:translate-x-full lg:right-0 lg:mt-0 lg:pl-2 visible\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"w-full h-32 md:h-48 flex-shrink-0\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"absolute bottom-0 left-0 w-full border-t md:border-t-0 dark:border-white\/20 md:border-transparent md:dark:border-transparent md:bg-vert-light-gradient bg-white dark:bg-gray-800 md:!bg-transparent dark:md:bg-vert-dark-gradient\">\n<form class=\"stretch mx-2 flex flex-row gap-3 pt-2 last:mb-2 md:last:mb-6 lg:mx-auto lg:max-w-3xl lg:pt-6\">\n<div class=\"relative flex h-full flex-1 md:flex-col\">\n<div class=\"flex ml-1 mt-1.5 md:w-full md:m-auto md:mb-2 gap-0 md:gap-2 justify-center\"><\/div>\n<\/div>\n<\/form>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>In the realm of data modeling and database design, the entity-relationship diagram (ERD) is an essential tool that plays a vital role. It serves as a visual representation of data, aiding in the description of the relationships between entities and their attributes. By displaying the relationships between entities in a clear and concise manner, ERDs provide an excellent means of modeling intricate systems and identifying how different entities are interconnected.<\/p>\n","protected":false},"author":1,"featured_media":9992,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-9991","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u306e\u7fd2\u5f97\uff1a\u52b9\u679c\u7684\u306a\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3092\u8a2d\u8a08\u3059\u308b\u305f\u3081\u306e\u5305\u62ec\u7684\u30ac\u30a4\u30c9 - \u30b5\u30a4\u30d0\u30fc\u30e1\u30c7\u30a3\u30a2\u30f3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cybermedian.com\/ja\/mastering-entity-relationship-diagrams-a-comprehensive-guide-to-designing-effective-data-models\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u306e\u7fd2\u5f97\uff1a\u52b9\u679c\u7684\u306a\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3092\u8a2d\u8a08\u3059\u308b\u305f\u3081\u306e\u5305\u62ec\u7684\u30ac\u30a4\u30c9 - \u30b5\u30a4\u30d0\u30fc\u30e1\u30c7\u30a3\u30a2\u30f3\" \/>\n<meta property=\"og:description\" content=\"In the realm of data modeling and database design, the entity-relationship diagram (ERD) is an essential tool that plays a vital role. 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