{"id":1527,"date":"2026-03-23T04:10:01","date_gmt":"2026-03-23T04:10:01","guid":{"rendered":"https:\/\/www.ez-knowledge.com\/ja\/resolving-deadlock-risks-entity-relationship-models\/"},"modified":"2026-03-23T04:10:01","modified_gmt":"2026-03-23T04:10:01","slug":"resolving-deadlock-risks-entity-relationship-models","status":"publish","type":"post","link":"https:\/\/www.ez-knowledge.com\/ja\/resolving-deadlock-risks-entity-relationship-models\/","title":{"rendered":"\u3088\u308a\u826f\u3044\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u30e2\u30c7\u30eb\u306b\u3088\u308b\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u30ea\u30b9\u30af\u306e\u89e3\u6d88"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Child-style crayon drawing infographic summarizing how better Entity Relationship Model design prevents database deadlocks, showing foreign key indexing, avoiding circular references, balancing normalization, short transactions, and a design checklist\" decoding=\"async\" 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\u89aa\u30c6\u30fc\u30d6\u30eb\u3068\u5b50\u30c6\u30fc\u30d6\u30eb\u306e\u4e21\u65b9\u304c\u983b\u7e41\u306b\u66f8\u304d\u8fbc\u307e\u308c\u308b\u5834\u5408\u3001\u5b50\u30c6\u30fc\u30d6\u30eb\u306b\u89aa\u30ad\u30fc\u3092\u8907\u88fd\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\u3059\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5b50\u30c6\u30fc\u30d6\u30eb\u306e\u5909\u66f4\u6642\u306b\u89aa\u30c6\u30fc\u30d6\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3057\u306a\u304f\u3066\u3082\u3088\u304f\u306a\u308b\u305f\u3081\u3001\u89aa\u30c6\u30fc\u30d6\u30eb\u3067\u306e\u30ed\u30c3\u30af\u7af6\u5408\u304c\u6e1b\u5c11\u3059\u308b\u3002<\/li>\n<li><strong>\u697d\u89b3\u7684\u30ed\u30c3\u30af\u30d5\u30a3\u30fc\u30eb\u30c9\uff1a<\/strong> \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30ec\u30d9\u30eb\u306e\u5916\u90e8\u30ad\u30fc\u30ed\u30c3\u30af\u306b\u5b8c\u5168\u306b\u4f9d\u5b58\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u30d0\u30fc\u30b8\u30e7\u30f3\u30ab\u30e9\u30e0\u3092\u5c0e\u5165\u3059\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u6574\u5408\u6027\u30c1\u30a7\u30c3\u30af\u3092\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\u306b\u79fb\u884c\u3067\u304d\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u30ed\u30c3\u30af\u3092\u4fdd\u6301\u3059\u308b\u6642\u9593\u306e\u77ed\u7e2e\u306b\u3064\u306a\u304c\u308b\u3053\u3068\u304c\u591a\u3044\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udcc9 \u6b63\u898f\u5316\u30ec\u30d9\u30eb\u3068\u8aad\u307f\u66f8\u304d\u306e\u30d0\u30e9\u30f3\u30b9<\/h2>\n<p>\u7b2c\u4e09\u6b63\u898f\u5f62\uff083NF\uff09\u306f\u30c7\u30fc\u30bf\u6574\u5408\u6027\u306e\u57fa\u6e96\u3067\u3042\u308a\u3001\u5197\u9577\u6027\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3002\u3057\u304b\u3057\u3001\u9ad8\u6027\u80fd\u306a\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30b7\u30b9\u30c6\u30e0\u306b\u306f\u5fc5\u305a\u3057\u3082\u6700\u9069\u3067\u306f\u306a\u3044\u3002\u9ad8\u5ea6\u306b\u6b63\u898f\u5316\u3055\u308c\u305f\u30b9\u30ad\u30fc\u30de\u306f\u3001\u95a2\u9023\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u8907\u6570\u306e\u7d50\u5408\u3092\u5fc5\u8981\u3068\u3059\u308b\u3002\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u5185\u3067\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3059\u308b\u3068\u3001\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u30ed\u30c3\u30af\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u306b\u306a\u308b\u3002\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u9593\u3067\u30a2\u30af\u30bb\u30b9\u9806\u5e8f\u304c\u4e00\u8cab\u3057\u306a\u3044\u5834\u5408\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306f\u907f\u3051\u3089\u308c\u306a\u3044\u3002<\/p>\n<p>\u9006\u306b\u3001\u9ad8\u5ea6\u306b\u975e\u6b63\u898f\u5316\u3055\u308c\u305f\u30b9\u30ad\u30fc\u30de\u306f\u7d50\u5408\u6570\u3092\u6e1b\u3089\u3059\u304c\u3001\u884c\u306e\u30b5\u30a4\u30ba\u3092\u5897\u52a0\u3055\u305b\u308b\u3002\u5927\u304d\u306a\u884c\u306f\u30da\u30fc\u30b8\u5206\u5272\u3084I\/O\u306e\u5897\u52a0\u3092\u5f15\u304d\u8d77\u3053\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u60aa\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u3082\u3042\u308b\u3002\u76ee\u6a19\u306f\u3001ERD\u304c\u6700\u3082\u4e00\u822c\u7684\u306a\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3064\u3064\u3001\u4e0d\u8981\u306a\u8907\u96d1\u3055\u3092\u5c0e\u5165\u3057\u306a\u3044\u30d0\u30e9\u30f3\u30b9\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u3067\u3042\u308b\u3002<\/p>\n<p>\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u30ea\u30b9\u30af\u3092\u691c\u8a0e\u3059\u308b\u969b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u3092\u691c\u8a0e\u3059\u3079\u304d\u3067\u3042\u308b\uff1a<\/p>\n<ul>\n<li><strong>\u5197\u9577\u6027 vs. \u6574\u5408\u6027\uff1a<\/strong> \u6ce8\u6587\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u30b9\u30c6\u30fc\u30bf\u30b9\u53c2\u7167\u30c6\u30fc\u30d6\u30eb\u306b\u7d50\u5408\u3059\u308b\u4ee3\u308f\u308a\u306b\u3001\u6ce8\u6587\u30c6\u30fc\u30d6\u30eb\u306b\u76f4\u63a5\u683c\u7d0d\u3059\u308b\u3053\u3068\u306f\u53ef\u80fd\u304b\uff1f\u3053\u308c\u306b\u3088\u308a\u7d50\u5408\u56de\u6570\u3068\u30ed\u30c3\u30af\u5bfe\u8c61\u30c6\u30fc\u30d6\u30eb\u6570\u304c\u6e1b\u5c11\u3059\u308b\u3002<\/li>\n<li><strong>\u7d50\u5408\u306e\u8907\u96d1\u3055\uff1a<\/strong>\u5358\u4e00\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u5185\u3067\u95a2\u4fc2\u306e\u9023\u9396\uff08A\u304cB\u306b\u30ea\u30f3\u30af\u3057\u3001B\u304cC\u306b\u30ea\u30f3\u30af\u3057\u3001C\u304cD\u306b\u30ea\u30f3\u30af\u3059\u308b\uff09\u3092\u907f\u3051\u308b\u3002\u53ef\u80fd\u306a\u5834\u5408\u306f\u3001\u3053\u308c\u3089\u3092\u5225\u3005\u306e\u8ad6\u7406\u7684\u64cd\u4f5c\u306b\u5206\u5272\u3059\u308b\u3002<\/li>\n<li><strong>\u8aad\u307f\u8fbc\u307f\u4e2d\u5fc3 vs. \u66f8\u304d\u8fbc\u307f\u4e2d\u5fc3\uff1a<\/strong>\u30e2\u30c7\u30eb\u306e\u4e00\u90e8\u304c\u8aad\u307f\u8fbc\u307f\u4e2d\u5fc3\u306e\u5834\u5408\u3001\u975e\u6b63\u898f\u5316\u306f\u8a31\u5bb9\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\u66f8\u304d\u8fbc\u307f\u4e2d\u5fc3\u306e\u5834\u5408\u3001\u6b63\u898f\u5316\u3092\u7dad\u6301\u3059\u308b\u304c\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u5805\u7262\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n<\/ul>\n<h2>\ud83e\udde9 \u5186\u74b0\u53c2\u7167\u3068\u4f9d\u5b58\u95a2\u4fc2\u30c1\u30a7\u30fc\u30f3<\/h2>\n<p>\u5186\u74b0\u53c2\u7167\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3A\u304c\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3B\u306b\u4f9d\u5b58\u3057\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3B\u304c\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3A\u306b\u4f9d\u5b58\u3059\u308b\u5834\u5408\u306b\u767a\u751f\u3059\u308b\u3002\u7279\u5b9a\u306e\u968e\u5c64\u69cb\u9020\u3067\u306f\u6642\u6298\u6b63\u5f53\u5316\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308b\u304c\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u74b0\u5883\u3067\u306f\u5371\u967a\u3067\u3042\u308b\u3002\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u304c\u5358\u4e00\u306e\u30b9\u30b3\u30fc\u30d7\u5185\u3067\u4e21\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u66f4\u65b0\u3057\u3088\u3046\u3068\u3057\u305f\u5834\u5408\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306fA\u3092\u30ed\u30c3\u30af\u3057\u3066\u304b\u3089B\u3092\u30ed\u30c3\u30af\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u5225\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u304cB\u3092\u30ed\u30c3\u30af\u3057\u3066\u304b\u3089A\u3092\u30ed\u30c3\u30af\u3059\u308b\u3068\u3001\u5373\u5ea7\u306b\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u304c\u767a\u751f\u3059\u308b\u3002<\/p>\n<p>ERD\u306f\u5186\u74b0\u4f9d\u5b58\u95a2\u4fc2\u306b\u3064\u3044\u3066\u76e3\u67fb\u3055\u308c\u308b\u3079\u304d\u3067\u3042\u308b\u3002\u30b5\u30a4\u30af\u30eb\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u306f\u3001\u614e\u91cd\u306b\u7ba1\u7406\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u591a\u304f\u306e\u5834\u5408\u3001\u4f9d\u5b58\u95a2\u4fc2\u3092\u524a\u9664\u3059\u308b\u304b\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\u5316\u3067\u304d\u308b\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u4f9d\u5b58\u95a2\u4fc2\u30d1\u30bf\u30fc\u30f3<\/th>\n<th>\u30ed\u30c3\u30af\u30ea\u30b9\u30af<\/th>\n<th>\u8a2d\u8a08\u4e0a\u306e\u7de9\u548c\u7b56<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u76f4\u63a5\u7684\u306a\u81ea\u5df1\u53c2\u7167<\/td>\n<td>\u9ad8<\/td>\n<td>\u5225\u9014\u306e\u968e\u5c64\u30c6\u30fc\u30d6\u30eb\u307e\u305f\u306fID\u30de\u30c3\u30d4\u30f3\u30b0\u3092\u4f7f\u7528\u3059\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u76f8\u4e92\u306e\u5916\u90e8\u30ad\u30fc<\/td>\n<td>\u6df1\u523b<\/td>\n<td>\u4e00\u65b9\u306e\u5916\u90e8\u30ad\u30fc\u3092\u524a\u9664\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\u3067\u5f37\u5236\u3059\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u6df1\u3044\u9023\u9396\uff08A\u2192B\u2192C\u2192A\uff09<\/td>\n<td>\u9ad8<\/td>\n<td>\u9023\u9396\u3092\u65ad\u3061\u5207\u308b\uff1b\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u5206\u5272\u3059\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td>1\u5bfe\u591a\u3067\u66f4\u65b0\u306e\u9023\u9396<\/td>\n<td>\u4e2d<\/td>\n<td>\u9023\u9396\u66f4\u65b0\u3092\u7121\u52b9\u5316\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u51e6\u7406\u3059\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5186\u74b0\u53c2\u7167\u3092\u907f\u3051\u3089\u308c\u306a\u3044\u5834\u5408\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u304c\u53b3\u683c\u306a\u30ed\u30c3\u30af\u9806\u5e8f\u3092\u5f37\u5236\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u3059\u3079\u3066\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306f\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3A\u3092\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3B\u3088\u308a\u5148\u306b\u30ed\u30c3\u30af\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u3057\u304b\u3057\u3001\u30ed\u30c3\u30af\u9806\u5e8f\u3092\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u306b\u4f9d\u5b58\u3059\u308b\u3053\u3068\u306f\u8106\u5f31\u3067\u3042\u308b\u3002\u53ef\u80fd\u306a\u9650\u308aERD\u3092\u518d\u69cb\u7bc9\u3057\u3066\u30b5\u30a4\u30af\u30eb\u3092\u6392\u9664\u3059\u308b\u307b\u3046\u304c\u5b89\u5168\u3067\u3042\u308b\u3002<\/p>\n<h2>\ud83d\uddfa\ufe0f ERD\u5185\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u6226\u7565<\/h2>\n<p>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c4\u30fc\u30eb\u3060\u3051\u3067\u306a\u304f\u3001\u30ed\u30c3\u30af\u30c4\u30fc\u30eb\u3067\u3082\u3042\u308b\u3002ERD\u306f\u3069\u306e\u5217\u304c\u5916\u90e8\u30ad\u30fc\u3067\u3042\u308a\u3001\u3069\u306e\u5217\u304c\u4e3b\u30ad\u30fc\u3067\u3042\u308b\u304b\u3092\u5b9a\u7fa9\u3059\u308b\u3002\u3053\u308c\u3089\u306e\u5217\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30f3\u30b8\u30f3\u304c\u30c7\u30fc\u30bf\u3092\u8fc5\u901f\u306b\u691c\u7d22\u3067\u304d\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3042\u308b\u3002ERD\u3067\u95a2\u4fc2\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u304c\u3001\u5bfe\u5fdc\u3059\u308b\u5217\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u306a\u3044\u5834\u5408\u3001\u30a8\u30f3\u30b8\u30f3\u306f\u30c6\u30fc\u30d6\u30eb\u30b9\u30ad\u30e3\u30f3\u3092\u5b9f\u884c\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u30c6\u30fc\u30d6\u30eb\u30b9\u30ad\u30e3\u30f3\u306f\u30b7\u30fc\u30af\u64cd\u4f5c\u3088\u308a\u3082\u591a\u304f\u306e\u884c\u3092\u30ed\u30c3\u30af\u3059\u308b\u305f\u3081\u3001\u4ed6\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u3059\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u304f\u306a\u308b\u3002<\/p>\n<p>\u3059\u3079\u3066\u306e\u5916\u90e8\u30ad\u30fc\u5217\u306b\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8a2d\u5b9a\u3059\u3079\u304d\u3067\u3042\u308b\u3002\u3053\u308c\u306f\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u9632\u3050\u305f\u3081\u306e\u57fa\u672c\u30eb\u30fc\u30eb\u3067\u3042\u308b\u3002\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u306a\u3051\u308c\u3070\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u6574\u5408\u6027\u30c1\u30a7\u30c3\u30af\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306b\u884c\u30ed\u30c3\u30af\u3092\u30c6\u30fc\u30d6\u30eb\u30ed\u30c3\u30af\u306b\u6607\u683c\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\u30c6\u30fc\u30d6\u30eb\u30ed\u30c3\u30af\u306f\u306f\u308b\u304b\u306b\u5236\u9650\u304c\u5f37\u304f\u3001\u7af6\u5408\u3092\u6307\u6570\u95a2\u6570\u7684\u306b\u5897\u52a0\u3055\u305b\u308b\u3002<\/p>\n<p>\u30e2\u30c7\u30eb\u5316\u30d5\u30a7\u30fc\u30ba\u3067\u4ee5\u4e0b\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u95a2\u3059\u308b\u8003\u616e\u4e8b\u9805\u3092\u691c\u8a0e\u3059\u308b\uff1a<\/p>\n<ul>\n<li><strong>\u5916\u90e8\u30ad\u30fc\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff1a<\/strong>\u3059\u3079\u3066\u306e\u5916\u90e8\u30ad\u30fc\u5217\u306b\u95a2\u9023\u3059\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n<li><strong>\u8907\u5408\u30ad\u30fc\uff1a<\/strong> 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