{"id":1660,"date":"2026-04-07T17:58:38","date_gmt":"2026-04-07T17:58:38","guid":{"rendered":"https:\/\/www.viz-note.com\/ja\/erd-performance-myth-buster\/"},"modified":"2026-04-07T17:58:38","modified_gmt":"2026-04-07T17:58:38","slug":"erd-performance-myth-buster","status":"publish","type":"post","link":"https:\/\/www.viz-note.com\/ja\/erd-performance-myth-buster\/","title":{"rendered":"\u795e\u8a71\u5d29\u58ca\uff1a\u5b8c\u74a7\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u9ad8\u901f\u5fdc\u7b54\u3092\u4fdd\u8a3c\u3059\u308b\u306e\u304b\uff1f"},"content":{"rendered":"<p>\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u4e16\u754c\u3067\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u307b\u3069\u91cd\u8981\u306a\u6982\u5ff5\u306f\u5c11\u306a\u3044\u3002ERD\u306f\u30c7\u30fc\u30bf\u306e\u8a2d\u8a08\u56f3\u3067\u3042\u308a\u3001\u30c6\u30fc\u30d6\u30eb\u3001\u30ad\u30fc\u3001\u95a2\u4fc2\u6027\u3068\u3044\u3046\u8907\u96d1\u306a\u69cb\u9020\u3092\u958b\u767a\u8005\u304c\u7406\u89e3\u3059\u308b\u305f\u3081\u306e\u5730\u56f3\u3067\u3042\u308b\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u9045\u5ef6\u3059\u308b\u3068\u304d\u3001\u591a\u304f\u306e\u5834\u5408\u3001\u6700\u521d\u306b\u30b9\u30b1\u30fc\u30de\u306e\u305b\u3044\u3060\u3068\u8003\u3048\u304c\u3061\u3060\u3002\u305d\u306e\u524d\u63d0\u306f\u660e\u78ba\u3060\uff1a\u56f3\u304c\u5b8c\u74a7\u306a\u3089\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3082\u5b8c\u74a7\u306b\u306a\u308b\u306f\u305a\u3060\u3002<\/p>\n<p>\u3053\u308c\u306f\u3088\u304f\u3042\u308b\u8aa4\u89e3\u3067\u3042\u308b\u3002 \ud83e\uddd0 \u3088\u304f\u8a2d\u8a08\u3055\u308c\u305fERD\u306f\u57fa\u76e4\u306b\u306f\u306a\u308b\u304c\u3001\u30b9\u30d4\u30fc\u30c9\u306e\u4e07\u80fd\u85ac\u3067\u306f\u306a\u3044\u3002\u5b8c\u74a7\u306a\u8ad6\u7406\u30e2\u30c7\u30eb\u304c\u3001\u81ea\u52d5\u7684\u306b\u9ad8\u901f\u306a\u7269\u7406\u5b9f\u884c\u306b\u7d50\u3073\u3064\u304f\u308f\u3051\u3067\u306f\u306a\u3044\u3002\u8a2d\u8a08\u7406\u8ad6\u3068\u5b9f\u884c\u6642\u306e\u73fe\u5b9f\u3068\u306e\u30ae\u30e3\u30c3\u30d7\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u5727\u529b\u304c\u304b\u304b\u308b\u72b6\u6cc1\u3067\u3082\u5fdc\u7b54\u6027\u3092\u4fdd\u3064\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3042\u308b\u3002<\/p>\n<p>\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u306a\u305c\u5b8c\u74a7\u306aERD\u304c\u9ad8\u901f\u306a\u5fdc\u7b54\u6642\u9593\u3092\u4fdd\u8a3c\u3057\u306a\u3044\u306e\u304b\u3001\u307e\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u4ed6\u306e\u91cd\u8981\u306a\u8981\u56e0\u306b\u3064\u3044\u3066\u89e3\u8aac\u3059\u308b\u3002\u30b9\u30c8\u30ec\u30fc\u30b8\u30a8\u30f3\u30b8\u30f3\u304b\u3089\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u9045\u5ef6\u306b\u81f3\u308b\u307e\u3067\u3001\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u5404\u5c64\u3092\u5206\u6790\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u901f\u5ea6\u306e\u771f\u306e\u8981\u56e0\u3092\u660e\u3089\u304b\u306b\u3059\u308b\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Line art infographic debunking the myth that a perfect Entity Relationship Diagram guarantees fast application performance. Shows ERD as foundational logical design with medium impact, surrounded by six high-impact performance factors: indexing strategy, query optimization, hardware resources, concurrency management, network\/caching, and execution plans. Visualizes the trade-off between data integrity and speed, with key takeaway that optimal performance requires synergy of logical modeling, strategic indexing, efficient queries, adequate infrastructure, and caching strategies.\" decoding=\"async\" src=\"https:\/\/www.viz-note.com\/wp-content\/uploads\/2026\/04\/erd-performance-myth-infographic-line-art.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83d\udcd0 \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u306e\u7406\u89e3<\/h2>\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6307\u6a19\u306e\u8a73\u7d30\u306a\u5206\u6790\u306b\u5165\u308b\u524d\u306b\u3001ERD\u304c\u5b9f\u969b\u306b\u4f55\u3092\u8868\u3057\u3066\u3044\u308b\u304b\u3092\u660e\u78ba\u306b\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002ERD\u306f\u8ad6\u7406\u7684\u306a\u69cb\u9020\u7269\u3067\u3042\u308b\u3002\u305d\u308c\u306f<strong>\u4f55<\/strong>\u306e\u30c7\u30fc\u30bf\u304c\u5b58\u5728\u3059\u308b\u304b\u3001\u305d\u3057\u3066<strong>\u3069\u306e\u3088\u3046\u306b<\/strong>\u4ed6\u306e\u30c7\u30fc\u30bf\u3068\u95a2\u4fc2\u3057\u3066\u3044\u308b\u304b\u3092\u8a18\u8ff0\u3059\u308b\u3002\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\uff08\u30c6\u30fc\u30d6\u30eb\uff09\u3001\u5c5e\u6027\uff08\u30ab\u30e9\u30e0\uff09\u3001\u95a2\u4fc2\u6027\uff08\u5916\u90e8\u30ad\u30fc\uff09\u3092\u5b9a\u7fa9\u3059\u308b\u3002<\/p>\n<ul>\n<li><strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\uff1a<\/strong>\u30c6\u30fc\u30d6\u30eb\u3068\u3057\u3066\u8868\u73fe\u3055\u308c\u305f\u73fe\u5b9f\u4e16\u754c\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3002<\/li>\n<li><strong>\u5c5e\u6027\uff1a<\/strong>\u305d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u7279\u5fb4\u3092\u30ab\u30e9\u30e0\u306b\u683c\u7d0d\u3057\u305f\u3082\u306e\u3002<\/li>\n<li><strong>\u95a2\u4fc2\u6027\uff1a<\/strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u30ea\u30f3\u30af\u3067\u3001\u901a\u5e38\u306f\u4e3b\u30ad\u30fc\u3068\u5916\u90e8\u30ad\u30fc\u306b\u3088\u3063\u3066\u5f37\u5236\u3055\u308c\u308b\u3002<\/li>\n<li><strong>\u57fa\u6570\uff1a<\/strong>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u6570\u7684\u95a2\u4fc2\uff081\u5bfe1\u30011\u5bfe\u591a\uff09\u3002<\/li>\n<\/ul>\n<p>ERD\u306e\u4e3b\u306a\u76ee\u7684\u306f\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3067\u3042\u308b\u3002\u30c7\u30fc\u30bf\u304c\u6642\u9593\u306e\u7d4c\u904e\u3068\u3068\u3082\u306b\u4e00\u8cab\u6027\u3092\u6301\u3061\u3001\u6b63\u78ba\u3067\u5229\u7528\u53ef\u80fd\u3067\u3042\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u3002\u5b64\u7acb\u3057\u305f\u30ec\u30b3\u30fc\u30c9\u306e\u767a\u751f\u3092\u9632\u304e\u3001\u53c2\u7167\u6574\u5408\u6027\u3092\u7dad\u6301\u3059\u308b\u3002\u3057\u304b\u3057\u3001\u6574\u5408\u6027\u3068\u901f\u5ea6\u306f\u540c\u3058\u3082\u306e\u3067\u306f\u306a\u3044\u3002\u30c9\u30a2\u3092\u9589\u3058\u3066\u56fa\u5b9a\u3059\u308b\u9375\u306f\u4e2d\u8eab\u3092\u5b88\u308b\u304c\u3001\u30c9\u30a2\u3092\u958b\u3051\u308b\u901f\u5ea6\u3092\u901f\u304f\u306f\u3057\u306a\u3044\u3002<\/p>\n<h2>\u26a1 \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u5f0f\uff1a\u30b9\u30ad\u30fc\u30de\u3092\u8d85\u3048\u3066<\/h2>\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5fdc\u7b54\u6642\u9593\u306f\u3001\u591a\u304f\u306e\u8981\u7d20\u306e\u5408\u8a08\u3067\u3042\u308b\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u305d\u306e\u5f0f\u306e\u4e00\u90e8\u306b\u3059\u304e\u306a\u3044\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30f3\u30b8\u30f3\u304c\u30c7\u30fc\u30bf\u3092\u77ac\u6642\u306b\u53d6\u5f97\u3057\u3066\u3082\u3001\u4ed6\u306e\u5834\u6240\u306b\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u304c\u3042\u308b\u305f\u3081\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u4f9d\u7136\u3068\u3057\u3066\u9045\u304f\u611f\u3058\u3089\u308c\u308b\u3053\u3068\u304c\u3042\u308b\u3002<\/p>\n<p>\u901f\u5ea6\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u4e3b\u306a\u8981\u56e0\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3001\u3057\u3070\u3057\u3070\u30b9\u30ad\u30fc\u30de\u8a2d\u8a08\u3092\u4e0a\u56de\u308b\u5f71\u97ff\u3092\u6301\u3064\uff1a<\/p>\n<h3>1. \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u6226\u7565<\/h3>\n<p>ERD\u306f\u4e3b\u30ad\u30fc\u3068\u5916\u90e8\u30ad\u30fc\u3092\u5b9a\u7fa9\u3057\u3066\u304a\u308a\u3001\u3053\u308c\u3089\u306f\u3057\u3070\u3057\u3070\u81ea\u52d5\u7684\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u751f\u6210\u3059\u308b\u3002\u3057\u304b\u3057\u3001\u3053\u308c\u3089\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u8907\u96d1\u306a\u30af\u30a8\u30ea\u306b\u5bfe\u3057\u3066\u307b\u3068\u3093\u3069\u5341\u5206\u3067\u306f\u306a\u3044\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u3001\u7279\u5b9a\u306e\u30af\u30a8\u30ea\u30d1\u30bf\u30fc\u30f3\u306b\u5408\u308f\u305b\u3066\u8abf\u6574\u3055\u308c\u305f\u88dc\u52a9\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u5927\u304d\u304f\u4f9d\u5b58\u3059\u308b\u3002<\/p>\n<ul>\n<li><strong>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u6b20\u5982\uff1a<\/strong>\u983b\u7e41\u306b\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3055\u308c\u308b\u30ab\u30e9\u30e0\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u306a\u3044\u5834\u5408\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u30d5\u30eb\u30c6\u30fc\u30d6\u30eb\u30b9\u30ad\u30e3\u30f3\u3092\u5b9f\u884c\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u3059\u3079\u3066\u306e\u884c\u3092\u8aad\u307f\u53d6\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u306f\u6307\u6570\u95a2\u6570\u7684\u306b\u9045\u304f\u306a\u308b\u3002<\/li>\n<li><strong>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\uff1a<\/strong>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u591a\u3059\u304e\u308b\u3068\u3001\u66f8\u304d\u8fbc\u307f\u64cd\u4f5c\u304c\u9045\u304f\u306a\u308b\u3002\u3059\u3079\u3066\u306e\u633f\u5165\u3084\u66f4\u65b0\u306f\u3001\u305d\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u95a2\u9023\u3059\u308b\u3059\u3079\u3066\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u66f4\u65b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/li>\n<li><strong>\u9078\u629e\u6027\uff1a<\/strong>\u9078\u629e\u6027\u304c\u4f4e\u3044\u30ab\u30e9\u30e0\uff08\u4f8b\uff1a\u6027\u5225\u3084\u30b9\u30c6\u30fc\u30bf\u30b9\uff09\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8a2d\u7f6e\u3057\u3066\u3082\u3001\u30af\u30a8\u30ea\u6700\u9069\u5316\u5b50\u304c\u7121\u8996\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/li>\n<\/ul>\n<h3>2. \u30af\u30a8\u30ea\u6700\u9069\u5316<\/h3>\n<p>\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u65b9\u6cd5\u306f\u3001\u305d\u306e\u4fdd\u5b58\u65b9\u6cd5\u3088\u308a\u3082\u91cd\u8981\u3067\u3059\u3002\u9069\u5207\u3067\u306a\u3044\u30af\u30a8\u30ea\u306f\u3001\u5b8c\u74a7\u306a\u30b9\u30ad\u30fc\u30de\u3092\u7121\u529b\u5316\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u822c\u7684\u306a\u554f\u984c\u306b\u306f\u4ee5\u4e0b\u304c\u542b\u307e\u308c\u307e\u3059\uff1a<\/p>\n<ul>\n<li><strong>N+1\u554f\u984c\uff1a<\/strong>\u89aa\u30ec\u30b3\u30fc\u30c9\u3092\u53d6\u5f97\u3057\u305f\u5f8c\u3001\u30eb\u30fc\u30d7\u3092\u4f7f\u3063\u3066\u500b\u5225\u306b\u5b50\u30ec\u30b3\u30fc\u30c9\u3092\u53d6\u5f97\u3059\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u30011\u3064\u306eJOIN\u3067\u6e08\u3080\u3068\u3053\u308d\u3092\u8907\u6570\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u5f80\u5fa9\u901a\u4fe1\u304c\u767a\u751f\u3059\u308b\u3002<\/li>\n<li><strong>SELECT * \u306e\u4f7f\u7528\uff1a<\/strong>\u3059\u3079\u3066\u306e\u30ab\u30e9\u30e0\u3092\u53d6\u5f97\u3059\u308b\u3068\u3001\u5fc5\u8981\u306a\u306e\u304c1\u3064\u3067\u3082\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3068\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u5897\u52a0\u3059\u308b\u3002<\/li>\n<li><strong>\u6697\u9ed9\u7684\u5909\u63db\uff1a<\/strong>\u6587\u5b57\u5217\u3068\u6570\u5024\u3001\u307e\u305f\u306f\u65e5\u4ed8\u3068\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u6bd4\u8f03\u3059\u308b\u3068\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u4f7f\u7528\u304c\u59a8\u3052\u3089\u308c\u308b\u3053\u3068\u304c\u3042\u308b\u3002<\/li>\n<li><strong>\u8907\u96d1\u306aJOIN\uff1a<\/strong>\u9069\u5207\u306a\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306a\u3057\u306b\u8907\u6570\u306e\u5927\u304d\u306a\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3059\u308b\u3068\u3001\u8a08\u7b97\u8ca0\u8377\u304c\u8457\u3057\u304f\u5897\u52a0\u3059\u308b\u3002<\/li>\n<\/ul>\n<h3>3. \u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u3068\u30a4\u30f3\u30d5\u30e9\u69cb\u9020<\/h3>\n<p>\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306e\u52b9\u7387\u6027\u306f\u7269\u7406\u7684\u306a\u5236\u9650\u3092\u514b\u670d\u3067\u304d\u306a\u3044\u3002\u57fa\u76e4\u3068\u306a\u308b\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u4e0a\u9650\u3092\u6c7a\u5b9a\u3059\u308b\u3002<\/p>\n<ul>\n<li><strong>\u30b9\u30c8\u30ec\u30fc\u30b8\u30bf\u30a4\u30d7\uff1a<\/strong>\u30e9\u30f3\u30c0\u30e0I\/O\u64cd\u4f5c\u306b\u304a\u3044\u3066\u3001\u30bd\u30ea\u30c3\u30c9\u30b9\u30c6\u30fc\u30c8\u30c9\u30e9\u30a4\u30d6\uff08SSD\uff09\u306f\u30cf\u30fc\u30c9\u30c7\u30a3\u30b9\u30af\u30c9\u30e9\u30a4\u30d6\uff08HDD\uff09\u3088\u308a\u3082\u8457\u3057\u304f\u9ad8\u901f\u3067\u3042\u308b\u3002<\/li>\n<li><strong>\u30e1\u30e2\u30ea\uff08RAM\uff09\uff1a<\/strong>\u30c7\u30fc\u30bf\u306e\u4f5c\u696d\u30bb\u30c3\u30c8\u304cRAM\u306b\u53ce\u307e\u308b\u5834\u5408\u3001\u30af\u30a8\u30ea\u306f\u307b\u307c\u77ac\u6642\u306b\u5b9f\u884c\u3055\u308c\u308b\u3002\u30c7\u30fc\u30bf\u3092\u30c7\u30a3\u30b9\u30af\u304b\u3089\u8aad\u307f\u8fbc\u3080\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u9045\u5ef6\u304c\u5897\u52a0\u3059\u308b\u3002<\/li>\n<li><strong>CPU\u30d1\u30ef\u30fc\uff1a<\/strong>\u8907\u96d1\u306a\u8a08\u7b97\u3001\u4e26\u3079\u66ff\u3048\u3001\u96c6\u8a08\u306b\u306f\u51e6\u7406\u80fd\u529b\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002<\/li>\n<li><strong>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u9045\u5ef6\uff1a<\/strong>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d0\u30fc\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b5\u30fc\u30d0\u30fc\u306e\u8ddd\u96e2\u304c\u3001\u3059\u3079\u3066\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u30df\u30ea\u79d2\u5358\u4f4d\u306e\u9045\u5ef6\u3092\u52a0\u3048\u308b\u3002<\/li>\n<\/ul>\n<h3>4. \u540c\u6642\u5b9f\u884c\u3068\u30ed\u30c3\u30af<\/h3>\n<p>\u8907\u6570\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u540c\u6642\u306b\u30b7\u30b9\u30c6\u30e0\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u7af6\u5408\u3092\u7ba1\u7406\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u3053\u308c\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3057\u3084\u3059\u3044\u30dd\u30a4\u30f3\u30c8\u3067\u3042\u308b\u3002<\/p>\n<ul>\n<li><strong>\u30ed\u30c3\u30af\u7af6\u5408\uff1a<\/strong>1\u3064\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u304c\u884c\u306b\u30ed\u30c3\u30af\u3092\u53d6\u5f97\u3057\u3066\u3044\u308b\u3068\u3001\u4ed6\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306f\u5f85\u305f\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u9ad8\u3044\u7af6\u5408\u306f\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3084\u9045\u3044\u5fdc\u7b54\u6642\u9593\u3092\u5f15\u304d\u8d77\u3053\u3059\u3002<\/li>\n<li><strong>\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\uff1a<\/strong>2\u3064\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u304c\u304a\u4e92\u3044\u3092\u5f85\u3064\u3053\u3068\u3067\u3001\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u306e\u505c\u6b62\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/li>\n<li><strong>\u5206\u96e2\u30ec\u30d9\u30eb\uff1a<\/strong>\u9ad8\u3044\u5206\u96e2\u30ec\u30d9\u30eb\uff08\u4f8b\uff1a\u53ef\u8996\u5316\u53ef\u80fd\uff09\u306f\u3088\u308a\u5f37\u3044\u4fdd\u8a3c\u3092\u63d0\u4f9b\u3059\u308b\u304c\u3001\u540c\u6642\u5b9f\u884c\u6027\u3068\u901f\u5ea6\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udcca ERD\u306e\u5f71\u97ff\u3068\u305d\u306e\u4ed6\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8981\u56e0\u306e\u6bd4\u8f03<\/h2>\n<p>ERD\u306e\u5f71\u97ff\u3092\u4ed6\u306e\u5909\u6570\u3068\u6bd4\u8f03\u3057\u3066\u53ef\u8996\u5316\u3059\u308b\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u5206\u89e3\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u306e\u8868\u306f\u3001ERD\u304c\u4fa1\u5024\u3092\u63d0\u4f9b\u3059\u308b\u70b9\u3068\u3001\u4e0d\u8db3\u3057\u3066\u3044\u308b\u70b9\u3092\u5f37\u8abf\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u8981\u56e0<\/th>\n<th>\u8aad\u307f\u53d6\u308a\u901f\u5ea6\u3078\u306e\u5f71\u97ff<\/th>\n<th>\u66f8\u304d\u8fbc\u307f\u901f\u5ea6\u3078\u306e\u5f71\u97ff<\/th>\n<th>ERD\u306e\u5f79\u5272<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u30c6\u30fc\u30d6\u30eb\u30b9\u30ad\u30fc\u30de\u69cb\u9020<\/td>\n<td>\u4e2d<\/td>\n<td>\u4e2d<\/td>\n<td>\u95a2\u4fc2\u6027\u3068\u6b63\u898f\u5316\u3092\u5b9a\u7fa9\u3059\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316<\/td>\n<td>\u9ad8<\/td>\n<td>\u4f4e<\/td>\n<td>ERD\u306f\u30ad\u30fc\u3092\u5b9a\u7fa9\u3059\u308b\u304c\u3001\u3059\u3079\u3066\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u5b9a\u7fa9\u3059\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u30af\u30a8\u30ea\u8ad6\u7406<\/td>\n<td>\u975e\u5e38\u306b\u9ad8\u3044<\/td>\n<td>\u4e2d<\/td>\n<td>ERD\u306f\u30af\u30a8\u30ea\u69cb\u6587\u3092\u898f\u5b9a\u3057\u306a\u3044\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u30ea\u30bd\u30fc\u30b9<\/td>\n<td>\u9ad8<\/td>\n<td>\u9ad8<\/td>\n<td>\u306a\u3057\u3002\u30b9\u30ad\u30fc\u30de\u306b\u4f9d\u5b58\u3057\u306a\u3044\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u9045\u5ef6<\/td>\n<td>\u9ad8<\/td>\n<td>\u4e2d<\/td>\n<td>\u306a\u3057\u3002\u30b9\u30ad\u30fc\u30de\u306b\u4f9d\u5b58\u3057\u306a\u3044\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u63a5\u7d9a\u30d7\u30fc\u30eb<\/td>\n<td>\u4e2d<\/td>\n<td>\u4e2d<\/td>\n<td>\u306a\u3057\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\u306b\u3088\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83e\uddf1 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\u6df1\u6398\u308a\uff1a\u30af\u30a8\u30ea\u5b9f\u884c\u8a08\u753b<\/h2>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30f3\u30b8\u30f3\u306f\u3001\u30af\u30a8\u30ea\u3092\u66f8\u304b\u308c\u305f\u901a\u308a\u306b\u6b63\u78ba\u306b\u5b9f\u884c\u3059\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5206\u6790\u3057\u3001\u6b21\u306e\u3082\u306e\u3092\u751f\u6210\u3057\u307e\u3059\u3002<strong>\u5b9f\u884c\u8a08\u753b<\/strong>\u3002\u3053\u306e\u8a08\u753b\u306f\u3001\u51e6\u7406\u306e\u9806\u5e8f\u3001\u3069\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3059\u308b\u304b\u3001\u30b9\u30ad\u30e3\u30f3\u3092\u884c\u3046\u304b\u30b7\u30fc\u30af\u3092\u884c\u3046\u304b\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>ERD\u306f\u30c7\u30fc\u30bf\u578b\u3084\u5236\u7d04\u306b\u95a2\u3059\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u6700\u9069\u5316\u30a8\u30f3\u30b8\u30f3\u306f\u30c7\u30fc\u30bf\u306e\u5206\u5e03\u306b\u95a2\u3059\u308b\u7d71\u8a08\u60c5\u5831\u3092\u7528\u3044\u3066\u6c7a\u5b9a\u3092\u884c\u3044\u307e\u3059\u3002\u7d71\u8a08\u60c5\u5831\u304c\u53e4\u304f\u306a\u3063\u3066\u3044\u308b\u3068\u3001\u6700\u9069\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u7121\u8996\u3057\u3066\u3001\u52a3\u3063\u305f\u8a08\u753b\u3092\u9078\u629e\u3057\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u30c6\u30fc\u30d6\u30eb\u306b1000\u4e07\u884c\u3042\u308b\u306e\u306b\u7d71\u8a08\u60c5\u5831\u304c100\u884c\u3060\u3068\u8aa4\u8a8d\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u6700\u9069\u5316\u30a8\u30f3\u30b8\u30f3\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30b7\u30fc\u30af\u3088\u308a\u3082\u30d5\u30eb\u30b9\u30ad\u30e3\u30f3\u306e\u65b9\u304c\u5b89\u4fa1\u3060\u3068\u5224\u65ad\u3059\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u826f\u597d\u306aERD\u69cb\u9020\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u6027\u80fd\u304c\u4f4e\u4e0b\u3057\u307e\u3059\u3002<\/p>\n<h2>\ud83d\udee1\ufe0f \u30c7\u30fc\u30bf\u6574\u5408\u6027 vs. \u901f\u5ea6<\/h2>\n<p>\u30c7\u30fc\u30bf\u6574\u5408\u6027\u3092\u78ba\u4fdd\u3059\u308b\u3053\u3068\u3068\u901f\u5ea6\u3092\u6700\u5927\u5316\u3059\u308b\u3053\u3068\u306e\u9593\u306b\u306f\u3001\u672c\u8cea\u7684\u306a\u7dca\u5f35\u95a2\u4fc2\u304c\u3042\u308a\u307e\u3059\u3002ERD\u306f\u5236\u7d04\u3084\u30c8\u30ea\u30ac\u30fc\u306a\u3069\u306e\u6574\u5408\u6027\u30eb\u30fc\u30eb\u3092\u5f37\u5236\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u5916\u90e8\u30ad\u30fc\u5236\u7d04\uff1a<\/strong>\u53c2\u7167\u6574\u5408\u6027\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002\u524a\u9664\u3084\u66f4\u65b0\u306e\u969b\u3001\u95a2\u9023\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u66f8\u304d\u8fbc\u307f\u51e6\u7406\u306b\u9045\u5ef6\u304c\u751f\u3058\u307e\u3059\u3002<\/li>\n<li><strong>\u30c8\u30ea\u30ac\u30fc\uff1a<\/strong>\u30c7\u30fc\u30bf\u5909\u66f4\u6642\u306b\u81ea\u52d5\u5b9f\u884c\u3055\u308c\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u3059\u3002\u30ed\u30b8\u30c3\u30af\u306e\u5b9f\u884c\u306b\u306f\u6709\u7528\u3067\u3059\u304c\u3001\u3059\u3079\u3066\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306b\u51e6\u7406\u6642\u9593\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u4e00\u610f\u5236\u7d04\uff1a<\/strong>\u65b0\u3057\u3044\u5024\u3092\u633f\u5165\u3059\u308b\u524d\u306b\u3001\u65e2\u5b58\u306e\u5024\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u9ad8\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30c1\u30a7\u30c3\u30af\u3092\u7121\u52b9\u5316\u3057\u305f\u308a\u3001\u9045\u3089\u305b\u3066\u901f\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u5b8c\u74a7\u306aERD\u306f\u3059\u3079\u3066\u306e\u30eb\u30fc\u30eb\u3092\u542b\u307f\u307e\u3059\u304c\u3001\u9ad8\u6027\u80fd\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u4fee\u6b63\u3055\u308c\u305f\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u5fc5\u8981\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\ud83d\udea6 \u6700\u9069\u5316\u306e\u5b9f\u8df5\u7684\u30b9\u30c6\u30c3\u30d7<\/h2>\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u9045\u3044\u5834\u5408\u3001\u3059\u3050\u306bERD\u3092\u518d\u8a2d\u8a08\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306e\u4f53\u7cfb\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u53d6\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>1. \u9045\u5ef6\u30af\u30a8\u30ea\u306e\u5206\u6790<\/h3>\n<p>\u9577\u6642\u9593\u5b9f\u884c\u3055\u308c\u308b\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u305f\u3081\u3001\u30af\u30a8\u30ea\u30ed\u30b0\u3092\u6709\u52b9\u5316\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u30c4\u30fc\u30eb\u3092\u4f7f\u3063\u3066\u3001\u6642\u9593\u304c\u3069\u3053\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30ed\u30c3\u30af\u5f85\u3061\u3067\u3059\u304b\uff1f\u884c\u306e\u30b9\u30ad\u30e3\u30f3\u3067\u3059\u304b\uff1f\u30ed\u30b8\u30c3\u30af\u306e\u51e6\u7406\u3067\u3059\u304b\uff1f<\/p>\n<h3>2. \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4f7f\u7528\u72b6\u6cc1\u306e\u78ba\u8a8d<\/h3>\n<p>\u5b9f\u969b\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4f7f\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u30b9\u30c8\u30ec\u30fc\u30b8\u3092\u6d88\u8cbb\u3057\u3001\u66f8\u304d\u8fbc\u307f\u3092\u9045\u304f\u3057\u307e\u3059\u3002\u983b\u7e41\u306b\u5b9f\u884c\u3055\u308c\u308b\u30af\u30a8\u30ea\u306eWHERE\u53e5\u3084JOIN\u53e5\u306b\u5408\u3063\u305f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>3. \u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306e\u5272\u5f53\u6700\u9069\u5316<\/h3>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b5\u30fc\u30d0\u30fc\u304c\u4f5c\u696d\u30bb\u30c3\u30c8\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u304d\u308b\u3060\u3051\u306eRAM\u3092\u6301\u3063\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u30e1\u30e2\u30ea\u5236\u9650\u306e\u5834\u5408\u3001RAM\u3092\u8ffd\u52a0\u3059\u308c\u3070\u5373\u52b9\u6027\u306e\u3042\u308b\u6539\u5584\u304c\u5f97\u3089\u308c\u307e\u3059\u3002CPU\u5236\u9650\u306e\u5834\u5408\u3001\u30d7\u30ed\u30bb\u30c3\u30b5\u306e\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3084\u30b3\u30fc\u30c9\u306e\u6700\u9069\u5316\u304c\u5fc5\u8981\u306b\u306a\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n<h3>4. \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5c0e\u5165<\/h3>\n<p>\u3059\u3079\u3066\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u983b\u7e41\u306b\u30a2\u30af\u30bb\u30b9\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306b\u306f\u30e1\u30e2\u30ea\u5185\u30ad\u30e3\u30c3\u30b7\u30e5\uff08Redis\u3084Memcached\u306a\u3069\uff09\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u8aad\u307f\u53d6\u308a\u64cd\u4f5c\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u5b8c\u5168\u306b\u8fc2\u56de\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>5. \u540c\u6642\u5b9f\u884c\u306e\u76e3\u8996<\/h3>\n<p>\u30ed\u30c3\u30af\u5f85\u3061\u3092\u76e3\u8996\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30e6\u30fc\u30b6\u30fc\u304c\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3092\u7d4c\u9a13\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u9577\u3055\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u77ed\u304f\u3059\u308b\u3053\u3068\u3067\u3001\u30ed\u30c3\u30af\u3092\u7d20\u65e9\u304f\u89e3\u653e\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\ud83d\udd04 \u30b9\u30ad\u30fc\u30de\u9032\u5316\u306e\u5f79\u5272<\/h2>\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u5909\u5316\u3057\u307e\u3059\u3002\u8981\u4ef6\u3082\u5909\u5316\u3057\u307e\u3059\u3002ERD\u306f\u30d3\u30b8\u30cd\u30b9\u306e\u5909\u5316\u306b\u5408\u308f\u305b\u3066\u9032\u5316\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u30026\u304b\u6708\u524d\u306b\u306f\u5b8c\u74a7\u3060\u3063\u305f\u30b9\u30ad\u30fc\u30de\u3067\u3082\u3001\u65b0\u3057\u3044\u6a5f\u80fd\u3084\u30c7\u30fc\u30bf\u91cf\u306e\u5897\u52a0\u306b\u3088\u308a\u3001\u4eca\u65e5\u3067\u306f\u9673\u8150\u5316\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u79fb\u884c\u6226\u7565\u306f\u91cd\u8981\u3067\u3059\u3002\u5c0f\u3055\u306a\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u5927\u304d\u306a\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30cb\u30f3\u30b0\u3055\u308c\u305f\u30c6\u30fc\u30d6\u30eb\u3078\u30c7\u30fc\u30bf\u3092\u79fb\u52d5\u3059\u308b\u3068\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5411\u4e0a\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30c7\u30fc\u30bf\u578b\u3092<code>VARCHAR<\/code>\u304b\u3089<code>INT<\/code>\u306b\u5909\u66f4\u3059\u308b\u3053\u3068\u3067\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u3092\u524a\u6e1b\u3057\u3001\u30b9\u30ad\u30e3\u30f3\u901f\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6c7a\u5b9a\u306f\u3001\u521d\u671f\u306eERD\u4f5c\u6210\u5f8c\u306b\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n<p>\u9759\u7684\u306aERD\u306f\u30c7\u30fc\u30bf\u306e\u5897\u52a0\u3092\u8003\u616e\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u30c7\u30fc\u30bf\u304c\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3059\u308b\u306b\u3064\u308c\u3066\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027\u3082\u5909\u5316\u3057\u307e\u3059\u30021\u4e07\u4ef6\u306e\u30ec\u30b3\u30fc\u30c9\u3067\u52d5\u4f5c\u3057\u3066\u3044\u305f\u8a2d\u8a08\u304c\u30011000\u4e07\u4ef6\u3067\u306f\u5931\u6557\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306f\u4e00\u5ea6\u304d\u308a\u306e\u4f5c\u696d\u3067\u306f\u306a\u304f\u3001\u7d99\u7d9a\u7684\u306a\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002<\/p>\n<h2>\ud83e\udde9 NoSQL\u306e\u8003\u616e\u4e8b\u9805<\/h2>\n<p>ERD\u306e\u6982\u5ff5\u306f\u3001\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u6700\u3082\u53b3\u5bc6\u306b\u9069\u7528\u3055\u308c\u307e\u3059\u3002NoSQL\u74b0\u5883\u3067\u306f\u3001\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u30b9\u30c8\u30a2\u3001\u30ad\u30fc\u5024\u30b9\u30c8\u30a2\u3001\u30b0\u30e9\u30d5\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u3001\u95a2\u4fc2\u306e\u6271\u3044\u65b9\u304c\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u30b9\u30c8\u30a2\u3067\u306f\u3001\u7d50\u5408\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u30c7\u30fc\u30bf\u3092\u57cb\u3081\u8fbc\u3080\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u610f\u56f3\u7684\u306b\u6b63\u898f\u5316\u3092\u56de\u907f\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u30b0\u30e9\u30d5\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306f\u3001\u95a2\u4fc2\u304c\u7b2c\u4e00\u7d1a\u306e\u5b58\u5728\u3068\u3057\u3066\u6271\u308f\u308c\u3001\u79fb\u52d5\u3092\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306b\u660e\u793a\u7684\u306b\u683c\u7d0d\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u306f\u3001ERD\u306e\u4fdd\u8a3c\u3068\u3044\u3046\u795e\u8a71\u304c\u3055\u3089\u306b\u5f37\u8abf\u3055\u308c\u307e\u3059\u3002NoSQL\u3067\u306f\u3001\u30b9\u30ad\u30fc\u30de\u306f\u3057\u3070\u3057\u3070\u67d4\u8edf\u307e\u305f\u306f\u52d5\u7684\u3067\u3059\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u3001\u53b3\u683c\u306a\u56f3\u9762\u3088\u308a\u3082\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u306b\u5927\u304d\u304f\u4f9d\u5b58\u3057\u307e\u3059\u3002<\/p>\n<h2>\ud83c\udfc1 \u30c7\u30fc\u30bf\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u95a2\u3059\u308b\u6700\u7d42\u7684\u306a\u8003\u5bdf<\/h2>\n<p>\u9ad8\u901f\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u306b\u306f\u5305\u62ec\u7684\u306a\u8996\u70b9\u304c\u5fc5\u8981\u3067\u3059\u3002ERD\u306f\u3001\u30c7\u30fc\u30bf\u304c\u8ad6\u7406\u7684\u306b\u6574\u7406\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u91cd\u8981\u306a\u51fa\u767a\u70b9\u3067\u3059\u3002\u6df7\u4e71\u3092\u9632\u304e\u3001\u6574\u5408\u6027\u3092\u7dad\u6301\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u305d\u308c\u306f\u30b9\u30d4\u30fc\u30c9\u3092\u751f\u307f\u51fa\u3059\u30a8\u30f3\u30b8\u30f3\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u4ee5\u4e0b\u306e\u8981\u7d20\u306e\u9023\u643a\u306e\u7d50\u679c\u3067\u3059\uff1a<\/p>\n<ul>\n<li>\u5805\u5b9f\u306a\u8ad6\u7406\u30e2\u30c7\u30eb\u3002<\/li>\n<li>\u6226\u7565\u7684\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4f5c\u6210\u3002<\/li>\n<li>\u52b9\u7387\u7684\u306a\u30af\u30a8\u30ea\u306e\u8a18\u8ff0\u3002<\/li>\n<li>\u9069\u5207\u306a\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u30ea\u30bd\u30fc\u30b9\u3002<\/li>\n<li>\u9069\u5207\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u69cb\u6210\u3002<\/li>\n<li>\u52b9\u679c\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565\u3002<\/li>\n<\/ul>\n<p>\u9045\u5ef6\u5fdc\u7b54\u306e\u539f\u56e0\u3092\u30b9\u30ad\u30fc\u30de\u306b\u5e30\u3059\u308b\u3068\u3044\u3046\u306e\u306f\u3001\u8aa4\u3063\u305f\u4fee\u6b63\u306b\u3064\u306a\u304c\u308b\u5358\u306a\u308b\u624b\u629c\u304d\u3067\u3059\u3002\u7d19\u4e0a\u306e\u5b8c\u74a7\u306a\u56f3\u9762\u306f\u3001\u9045\u3044\u30c7\u30a3\u30b9\u30af\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3001\u307e\u305f\u306f poorly written query \u3092\u88dc\u3046\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u771f\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5de5\u5b66\u3068\u306f\u3001\u30d6\u30eb\u30fc\u30d7\u30ea\u30f3\u30c8\u3092\u8d85\u3048\u3066\u3001\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3092\u89b3\u5bdf\u3059\u308b\u3053\u3068\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30b7\u30b9\u30c6\u30e0\u3092\u76e3\u67fb\u3059\u308b\u969b\u306f\u3001\u307e\u305aERD\u304b\u3089\u59cb\u3081\u3066\u6b63\u3057\u3055\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u6b21\u306b\u5b9f\u884c\u8a08\u753b\u306b\u79fb\u308a\u3001\u52b9\u7387\u6027\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u30a4\u30f3\u30d5\u30e9\u3092\u8a55\u4fa1\u3057\u3066\u3001\u5bb9\u91cf\u3092\u78ba\u4fdd\u3057\u307e\u3059\u3002\u3059\u3079\u3066\u306e\u30ec\u30a4\u30e4\u30fc\u306b\u53d6\u308a\u7d44\u3080\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u671f\u5f85\u3059\u308b\u5fdc\u7b54\u6027\u3092\u9054\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u4e16\u754c\u3067\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08E&hellip;<\/p>\n","protected":false},"author":1,"featured_media":1661,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"ERD\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u795e\u8a71\uff1a\u8a2d\u8a08\u304c\u30b9\u30d4\u30fc\u30c9\u3092\u4fdd\u8a3c\u3059\u308b\u306e\u304b\uff1f \ud83d\ude80","_yoast_wpseo_metadesc":"\u5b8c\u74a7\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u304c\u3001\u9ad8\u901f\u306a\u30a2\u30d7\u30ea\u5fdc\u7b54\u3092\u4fdd\u8a3c\u3059\u308b\u306e\u304b\uff1f \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u8a2d\u8a08\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3001\u5b9f\u969b\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8981\u56e0\u3092\u691c\u8a3c\u3057\u307e\u3057\u3087\u3046\u3002","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[68],"tags":[89,92],"class_list":["post-1660","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-database-design","tag-academic","tag-erd"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ 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property=\"og:title\" content=\"ERD\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u795e\u8a71\uff1a\u8a2d\u8a08\u304c\u30b9\u30d4\u30fc\u30c9\u3092\u4fdd\u8a3c\u3059\u308b\u306e\u304b\uff1f \ud83d\ude80\" \/>\n<meta property=\"og:description\" content=\"\u5b8c\u74a7\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u304c\u3001\u9ad8\u901f\u306a\u30a2\u30d7\u30ea\u5fdc\u7b54\u3092\u4fdd\u8a3c\u3059\u308b\u306e\u304b\uff1f \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u8a2d\u8a08\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3001\u5b9f\u969b\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8981\u56e0\u3092\u691c\u8a3c\u3057\u307e\u3057\u3087\u3046\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.viz-note.com\/ja\/erd-performance-myth-buster\/\" \/>\n<meta property=\"og:site_name\" content=\"Viz Note Japanese - AI Insights &amp; Software Industry Updates\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-07T17:58:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.viz-note.com\/ja\/wp-content\/uploads\/sites\/4\/2026\/04\/erd-performance-myth-infographic-line-art.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1664\" \/>\n\t<meta property=\"og:image:height\" content=\"928\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"vpadmin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"vpadmin\" \/>\n<script type=\"application\/ld+json\" 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