{"id":99,"date":"2026-04-02T13:34:38","date_gmt":"2026-04-02T13:34:38","guid":{"rendered":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/"},"modified":"2026-04-02T13:34:38","modified_gmt":"2026-04-02T13:34:38","slug":"hidden-cost-poor-erd-diagrams-refactoring","status":"publish","type":"post","link":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/","title":{"rendered":"\u52a3\u60aa\u306aER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u4e8b\u5f8c\u5206\u6790"},"content":{"rendered":"

\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30b7\u30b9\u30c6\u30e0\u304c\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3092\u59cb\u3081\u308b\u3068\u3001\u30c7\u30fc\u30bf\u5c64\u306f\u3057\u3070\u3057\u3070\u6700\u3082\u91cd\u8981\u306a\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3068\u306a\u308b\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u306f\u518d\u66f8\u304d\u76f4\u3057\u53ef\u80fd\u3067\u3001\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3082\u518d\u8a2d\u8a08\u53ef\u80fd\u3060\u304c\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u57fa\u76e4\u3068\u306a\u308b\u771f\u5b9f\u3092\u8868\u3057\u3066\u3044\u308b\u3002\u9069\u5207\u306b\u69cb\u7bc9\u3055\u308c\u3066\u3044\u306a\u3044\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u306f\u3001\u5358\u306a\u308b\u8996\u899a\u7684\u306a\u4e0d\u90fd\u5408\u3067\u306f\u306a\u304f\u3001\u6642\u9593\u3068\u3068\u3082\u306b\u60aa\u5316\u3059\u308b\u69cb\u9020\u4e0a\u306e\u5f31\u70b9\u3067\u3042\u308b\u3002\u3053\u306e\u5206\u6790\u3067\u306f\u3001\u4e0d\u9069\u5207\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30e2\u30c7\u30ea\u30f3\u30b0\u306b\u95a2\u9023\u3059\u308b\u5b9f\u8cea\u7684\u304b\u3064\u975e\u5b9f\u8cea\u7684\u306a\u30b3\u30b9\u30c8\u3001\u304a\u3088\u3073\u958b\u767a\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u306e\u5f8c\u534a\u306b\u3053\u308c\u3089\u306e\u69cb\u9020\u3092\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u3068\u3044\u3046\u8907\u96d1\u306a\u73fe\u5b9f\u3092\u691c\u8a3c\u3059\u308b\u3002<\/p>\n

\u591a\u304f\u306e\u30c1\u30fc\u30e0\u306f\u30b9\u30ad\u30fc\u30de\u8a2d\u8a08\u3092\u521d\u671f\u4f5c\u696d\u3068\u6349\u3048\u3001\u672c\u683c\u7684\u306a\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u304c\u59cb\u307e\u308b\u524d\u306b\u5b8c\u4e86\u3055\u305b\u308b\u3082\u306e\u3068\u8003\u3048\u308b\u3002\u3057\u304b\u3057\u3001\u8981\u4ef6\u304c\u5909\u5316\u3057\u3001\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u304c\u9032\u5316\u3059\u308b\u4e2d\u3067\u3001\u8a08\u753b\u304c\u4e0d\u5341\u5206\u306aERD\u306e\u786c\u76f4\u6027\u304c\u660e\u3089\u304b\u306b\u306a\u308b\u3002\u3053\u308c\u3089\u306e\u8a73\u7d30\u3092\u7121\u8996\u3059\u308b\u30b3\u30b9\u30c8\u306f\u3001SQL\u3092\u66f8\u304f\u305f\u3081\u306b\u8cbb\u3084\u3059\u6642\u9593\u3060\u3051\u3067\u306f\u306a\u304f\u3001\u958b\u767a\u901f\u5ea6\u306e\u4f4e\u4e0b\u3001\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0\u30ea\u30b9\u30af\u306e\u5897\u52a0\u3001\u30a4\u30f3\u30d5\u30e9\u69cb\u9020\u306b\u5bfe\u3059\u308b\u30c1\u30fc\u30e0\u306e\u4fe1\u983c\u306e\u4f4e\u4e0b\u306b\u3082\u8868\u308c\u308b\u3002<\/p>\n

\n
<\/figure>\n<\/div>\n

1. \u30d6\u30eb\u30fc\u30d7\u30ea\u30f3\u30c8\u306e\u305f\u3068\u3048\uff1a\u306a\u305c\u30b9\u30ad\u30fc\u30de\u304c\u91cd\u8981\u306a\u306e\u304b \ud83c\udfd7\ufe0f<\/h2>\n

\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u3092\u5efa\u7269\u306e\u5efa\u7bc9\u56f3\u9762\u306b\u305f\u3068\u3048\u308b\u3068\u3088\u3044\u3002\u8377\u91cd\u58c1\u304c\u8aa4\u3063\u3066\u914d\u7f6e\u3055\u308c\u305f\u308a\u3001\u914d\u7ba1\u304c\u975e\u52b9\u7387\u306b\u914d\u7dda\u3055\u308c\u305f\u308a\u3059\u308b\u3068\u3001\u69cb\u9020\u306f\u4e00\u6642\u7684\u306b\u306f\u7acb\u3064\u304b\u3082\u3057\u308c\u306a\u3044\u3002\u3057\u304b\u3057\u6642\u9593\u3068\u3068\u3082\u306b\u4e80\u88c2\u304c\u751f\u3058\u308b\u3002\u5f31\u3044\u57fa\u76e4\u306e\u4e0a\u306b\u8ffd\u52a0\u6a5f\u80fd\u3092\u7a4d\u307f\u91cd\u306d\u308b\u3068\u3001\u69cb\u9020\u7684\u5d29\u58ca\u304c\u8d77\u3053\u308b\u3002\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306b\u304a\u3044\u3066\u306f\u3001\u9045\u3044\u30af\u30a8\u30ea\u3001\u30c7\u30fc\u30bf\u306e\u4e0d\u6574\u5408\u3001\u65e2\u5b58\u306e\u6a5f\u80fd\u3092\u58ca\u3055\u305a\u306b\u65b0\u3057\u3044\u6a5f\u80fd\u3092\u8ffd\u52a0\u3067\u304d\u306a\u3044\u3068\u3044\u3063\u305f\u554f\u984c\u3068\u3057\u3066\u73fe\u308c\u308b\u3002<\/p>\n

ERD\u306f\u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u3001\u958b\u767a\u8005\u3001\u30c7\u30fc\u30bf\u30a2\u30fc\u30ad\u30c6\u30af\u30c8\u306e\u9593\u306e\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u30c4\u30fc\u30eb\u3068\u3057\u3066\u6a5f\u80fd\u3059\u308b\u3002\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3001\u305d\u306e\u5c5e\u6027\u3001\u304a\u3088\u3073\u305d\u308c\u3089\u306e\u95a2\u4fc2\u6027\u3092\u5b9a\u7fa9\u3059\u308b\u3002\u3053\u306e\u56f3\u304c\u66d6\u6627\u307e\u305f\u306f\u4e0d\u5b8c\u5168\u306a\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u554f\u984c\u304c\u751f\u3058\u308b\u3002<\/p>\n

    \n
  • \u5b9f\u88c5\u306e\u66d6\u6627\u3055\uff1a<\/strong>\u958b\u767a\u8005\u306f\u30c7\u30fc\u30bf\u6574\u5408\u6027\u306b\u3064\u3044\u3066\u306e\u4eee\u5b9a\u3092\u884c\u3046\u304c\u3001\u305d\u308c\u306f\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u3068\u4e00\u81f4\u3057\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/li>\n
  • \u6b63\u898f\u5316\u306e\u554f\u984c\uff1a<\/strong>\u30c7\u30fc\u30bf\u304c\u904e\u5ea6\u306b\u65ad\u7247\u5316\u3055\u308c\u3001\u904e\u5270\u306a\u7d50\u5408\u304c\u5fc5\u8981\u306b\u306a\u308b\u304b\u3001\u9006\u306b\u904e\u5ea6\u306b\u975e\u6b63\u898f\u5316\u3055\u308c\u3001\u66f4\u65b0\u7570\u5e38\u304c\u751f\u3058\u308b\u3002<\/li>\n
  • \u5236\u7d04\u306e\u7a74\uff1a<\/strong>\u5916\u90e8\u30ad\u30fc\u307e\u305f\u306f\u30c1\u30a7\u30c3\u30af\u5236\u7d04\u304c\u6b20\u5982\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u7121\u52b9\u306a\u30c7\u30fc\u30bf\u304c\u30b7\u30b9\u30c6\u30e0\u306b\u6d41\u5165\u3059\u308b\u3002<\/li>\n<\/ul>\n

    \u3053\u308c\u3089\u306e\u554f\u984c\u306f\u84c4\u7a4d\u3055\u308c\u308b\u3002\u95a2\u4fc2\u6027\u306e\u30bf\u30a4\u30d7\u306b\u95a2\u3059\u308b\u5c0f\u3055\u306a\u8aa4\u308a\u306f\u6570\u304b\u6708\u9593\u898b\u904e\u3054\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u3001\u7279\u5b9a\u306e\u30ec\u30dd\u30fc\u30c8\u3084\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u5b9f\u884c\u6642\u306b\u6df1\u523b\u306a\u969c\u5bb3\u3092\u5f15\u304d\u8d77\u3053\u3059\u3002<\/p>\n

    2. \u4e0d\u9069\u5207\u306a\u30b9\u30ad\u30fc\u30de\u306e\u69cb\u9020\uff1a\u4e00\u822c\u7684\u306a\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u8aa4\u308a \ud83d\udd0d<\/h2>\n

    ERD\u5185\u306e\u5177\u4f53\u7684\u306a\u8aa4\u308a\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u306f\u3001\u95a2\u9023\u3059\u308b\u30b3\u30b9\u30c8\u3092\u7406\u89e3\u3059\u308b\u7b2c\u4e00\u6b69\u3067\u3042\u308b\u3002\u4ee5\u4e0b\u306f\u3001\u5927\u304d\u306a\u6280\u8853\u7684\u8ca0\u50b5\u3092\u751f\u3080\u4e00\u822c\u7684\u306a\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u843d\u3068\u3057\u7a74\u306e\u6982\u8981\u3067\u3042\u308b\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n
    \u30ab\u30c6\u30b4\u30ea<\/th>\n\u4e00\u822c\u7684\u306a\u8aa4\u308a<\/th>\n\u30b7\u30b9\u30c6\u30e0\u3078\u306e\u5f71\u97ff<\/th>\n<\/tr>\n<\/thead>\n
    \u95a2\u4fc2\u6027<\/td>\n\u57fa\u6570\u306e\u8aa4\u8a8d\uff081:1 \u3068 1:N \u306e\u6df7\u540c\uff09<\/td>\n\u975e\u52b9\u7387\u306a\u30b9\u30c8\u30ec\u30fc\u30b8\u3001\u8907\u96d1\u306a\u7d50\u5408\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3002<\/td>\n<\/tr>\n
    \u5236\u7d04<\/td>\n\u5916\u90e8\u30ad\u30fc\u306e\u6b20\u843d<\/td>\n\u5b64\u7acb\u30ec\u30b3\u30fc\u30c9\u3001\u30c7\u30fc\u30bf\u6574\u5408\u6027\u306e\u55aa\u5931\u3001\u624b\u52d5\u3067\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u304c\u5fc5\u8981\u3002<\/td>\n<\/tr>\n
    \u5c5e\u6027<\/td>\n\u539f\u5b50\u7684\u3067\u306a\u3044\u30ab\u30e9\u30e0<\/td>\n\u30af\u30a8\u30ea\u306e\u56f0\u96e3\u3001\u30c7\u30fc\u30bf\u306e\u7279\u5b9a\u90e8\u5206\u3078\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\u304c\u4e0d\u53ef\u80fd\u3002<\/td>\n<\/tr>\n
    \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/td>\n\u5916\u90e8\u30ad\u30fc\u3078\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u6b20\u843d<\/td>\n\u7d50\u5408\u306e\u9045\u5ef6\u3001\u66f8\u304d\u8fbc\u307f\u6642\u306e\u30ed\u30c3\u30af\u7af6\u5408\u3001CPU\u4f7f\u7528\u7387\u306e\u4e0a\u6607\u3002<\/td>\n<\/tr>\n
    \u8a2d\u8a08<\/td>\n\u6df1\u304f\u30cd\u30b9\u30c8\u3055\u308c\u305f\u6b63\u898f\u5316<\/td>\n\u5358\u7d14\u306a\u8aad\u307f\u53d6\u308a\u306e\u305f\u3081\u306b\u904e\u5270\u306a\u30c6\u30fc\u30d6\u30eb\u7d50\u5408\u304c\u884c\u308f\u308c\u3001\u30af\u30a8\u30ea\u306e\u8907\u96d1\u3055\u304c\u5897\u3059\u3002<\/td>\n<\/tr>\n
    \u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3<\/td>\n\u30b9\u30ad\u30fc\u30de\u5185\u306e\u30cf\u30fc\u30c9\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30ed\u30b8\u30c3\u30af<\/td>\n\u65b0\u3057\u3044\u30d3\u30b8\u30cd\u30b9\u72b6\u614b\u306b\u9069\u5fdc\u3067\u304d\u306a\u3044\u67d4\u8edf\u6027\u306e\u306a\u3044\u30b9\u30ad\u30fc\u30de\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u3053\u308c\u3089\u306e\u5404\u9805\u76ee\u306f\u3001\u6469\u64e6\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u8868\u3057\u3066\u3044\u307e\u3059\u3002\u958b\u767a\u8005\u304c\u30b9\u30ad\u30fc\u30de\u5185\u3067\u30a8\u30e9\u30fc\u306b\u906d\u9047\u3059\u308b\u3068\u3001\u3057\u3070\u3057\u3070\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ec\u30d9\u30eb\u306e\u30ed\u30b8\u30c3\u30af\u3067\u56de\u907f\u7b56\u3092\u8b1b\u3058\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u304c\u30b3\u30fc\u30c9\u30d9\u30fc\u30b9\u306b\u62bc\u3057\u8fbc\u307e\u308c\u3001\u7dad\u6301\u304c\u96e3\u3057\u3044\u30b3\u30f3\u30bb\u30d7\u30c8\u306e\u5206\u96e2\u304c\u751f\u3058\u307e\u3059\u3002<\/p>\n

    3. \u6280\u8853\u7684\u8ca0\u50b5\u306e\u6e2c\u5b9a \ud83d\udcb0<\/h2>\n

    \u60aa\u3044\u8a2d\u8a08\u306e\u30b3\u30b9\u30c8\u306f\u307b\u3068\u3093\u3069\u5373\u6642\u306b\u306f\u73fe\u308c\u307e\u305b\u3093\u3002\u305d\u308c\u306f\u30ea\u30bd\u30fc\u30b9\u3078\u306e\u3086\u3063\u304f\u308a\u3068\u3057\u305f\u6d88\u8017\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30b3\u30b9\u30c8\u3092\u3001\u958b\u767a\u901f\u5ea6\u3001\u904b\u7528\u5b89\u5b9a\u6027\u3001\u4fdd\u5b88\u8ca0\u8377\u306e3\u3064\u306e\u4e3b\u8981\u306a\u30ab\u30c6\u30b4\u30ea\u306b\u5206\u985e\u3067\u304d\u307e\u3059\u3002<\/p>\n

    3.1 \u958b\u767a\u901f\u5ea6<\/h3>\n

    \u30b9\u30ad\u30fc\u30de\u304c\u660e\u78ba\u3067\u306a\u3044\u5834\u5408\u3001\u958b\u767a\u8005\u306f\u6a5f\u80fd\u306e\u69cb\u7bc9\u3067\u306f\u306a\u304f\u3001\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u9006\u5de5\u7a0b\u306b\u6642\u9593\u3092\u8cbb\u3084\u3059\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u5f7c\u3089\u306f\u6b21\u306e\u3088\u3046\u306a\u4f5c\u696d\u3092\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\uff1a<\/p>\n

      \n
    • \u5358\u4e00\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u3001\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u308f\u305f\u308b\u30c7\u30fc\u30bf\u306e\u6d41\u308c\u3092\u8ffd\u8de1\u3059\u308b\u3002<\/li>\n
    • \u6b20\u843d\u3057\u3066\u3044\u308b\u95a2\u4fc2\u3092\u88dc\u3046\u305f\u3081\u306b\u3001\u8907\u96d1\u306aSQL\u30af\u30a8\u30ea\u3092\u66f8\u304f\u3002<\/li>\n
    • \u5143\u306e\u5834\u6240\u3067\u9632\u6b62\u3059\u3079\u304d\u30c7\u30fc\u30bf\u306e\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u4f5c\u696d\u3092\u51e6\u7406\u3059\u308b\u3002<\/li>\n<\/ul>\n

      \u3053\u308c\u306b\u3088\u308a\u6a5f\u80fd\u306e\u63d0\u4f9b\u304c\u9045\u308c\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30c7\u30d0\u30c3\u30b0\u306e\u305f\u3081\u30013\u65e5\u3067\u7d42\u308f\u308b\u30b9\u30d7\u30ea\u30f3\u30c8\u304c5\u65e5\u30846\u65e5\u307e\u3067\u5ef6\u3073\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u7d44\u7e54\u306e\u6642\u9593\u3068\u4e88\u7b97\u306b\u5bfe\u3059\u308b\u76f4\u63a5\u7684\u306a\u30b3\u30b9\u30c8\u3067\u3059\u3002<\/p>\n

      3.2 \u904b\u7528\u5b89\u5b9a\u6027<\/h3>\n

      \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u554f\u984c\u306f\u3001\u8ca0\u8377\u304c\u304b\u304b\u308b\u672c\u756a\u74b0\u5883\u3067\u3057\u3070\u3057\u3070\u9855\u5728\u5316\u3057\u307e\u3059\u3002\u60aa\u3044\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u6226\u7565\u3084\u5236\u7d04\u306e\u6b20\u5982\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n

        \n
      • \u30ed\u30c3\u30af\u7af6\u5408\uff1a<\/strong>\u8907\u6570\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u304c\u540c\u3058 poorly structured\uff08\u69cb\u9020\u304c\u60aa\u3044\uff09\u30c6\u30fc\u30d6\u30eb\u3092\u66f4\u65b0\u3057\u3088\u3046\u3068\u3059\u308b\u5834\u5408\u3001\u30b7\u30b9\u30c6\u30e0\u306f\u5b8c\u5168\u306b\u505c\u6b62\u3057\u307e\u3059\u3002<\/li>\n
      • \u30af\u30a8\u30ea\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\uff1a<\/strong>\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u7d50\u5408\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u4e0d\u8981\u306b\u6570\u767e\u4e07\u884c\u3092\u30b9\u30ad\u30e3\u30f3\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n
      • \u30c7\u30fc\u30bf\u7834\u640d\uff1a<\/strong>\u9069\u5207\u306a\u5236\u7d04\u304c\u306a\u3051\u308c\u3070\u3001\u7121\u52b9\u306a\u30c7\u30fc\u30bf\u304c\u30b7\u30b9\u30c6\u30e0\u5185\u3092\u4f1d\u64ad\u3057\u3001\u30ec\u30dd\u30fc\u30c8\u306e\u4fe1\u983c\u6027\u304c\u640d\u306a\u308f\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n

        3.3 \u4fdd\u5b88\u8ca0\u8377<\/h3>\n

        flawed\uff08\u6b20\u9665\u306e\u3042\u308b\uff09\u30b9\u30ad\u30fc\u30de\u304c\u5b58\u5728\u3059\u308b\u6bce\u5e74\u3001\u4fee\u6b63\u306b\u304b\u304b\u308b\u30b3\u30b9\u30c8\u306f\u5897\u52a0\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u4f9d\u5b58\u95a2\u4fc2\u306e\u84c4\u7a4d\u306b\u3088\u308b\u3082\u306e\u3067\u3059\u3002\u65b0\u3057\u3044\u6a5f\u80fd\u306f\u3001\u53e4\u3044\u6b20\u9665\u306e\u3042\u308b\u69cb\u9020\u306e\u4e0a\u306b\u69cb\u7bc9\u3055\u308c\u307e\u3059\u3002\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306f\u3001\u4eba\u3005\u304c\u5bb6\u306e\u4e2d\u306b\u4f4f\u3093\u3067\u3044\u308b\u9593\u306b\u305d\u306e\u5bb6\u306e\u57fa\u790e\u3092\u79fb\u52d5\u3059\u308b\u3088\u3046\u306a\u3082\u306e\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

        4. \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u30d7\u30ed\u30bb\u30b9\uff1a\u8907\u96d1\u6027\u3068\u30ea\u30b9\u30af \ud83d\udee0\ufe0f<\/h2>\n

        \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u6c7a\u5b9a\u3057\u305f\u5f8c\u3001\u305d\u306e\u30d7\u30ed\u30bb\u30b9\u306f\u591a\u304f\u306e\u8ab2\u984c\u306b\u6e80\u3061\u3066\u3044\u307e\u3059\u3002\u5358\u306b\u30c6\u30fc\u30d6\u30eb\u3092\u5909\u66f4\u3059\u308b\u3060\u3051\u306e\u8a71\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u3001\u30c7\u30fc\u30bf\u6574\u5408\u6027\u306e\u78ba\u8a8d\u3001\u6700\u5c0f\u9650\u306e\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0\u3092\u614e\u91cd\u306b\u8abf\u6574\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

        4.1 \u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u6226\u7565<\/h3>\n

        \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306b\u306f\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u5fc5\u8981\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u3001\u518d\u5b9f\u884c\u53ef\u80fd\uff08idempotent\uff09\u304b\u3064\u5143\u306b\u623b\u305b\u308b\uff08reversible\uff09\u3082\u306e\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u3057\u304b\u3057\u3001\u30b9\u30ad\u30fc\u30de\u304c\u9069\u5207\u306b\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u5316\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u3001\u3053\u308c\u3089\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u66f8\u304f\u3053\u3068\u306f\u63a8\u6e2c\u306e\u30b2\u30fc\u30e0\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u3092\u78ba\u5b9f\u306b\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\uff1a<\/p>\n

          \n
        • \u65e2\u5b58\u306e\u30c7\u30fc\u30bf\u304c\u640d\u5931\u306a\u304f\u6b63\u3057\u304f\u5909\u63db\u3055\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n
        • \u5b9f\u884c\u4e2d\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u79fb\u884c\u4e2d\u306b\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u306a\u3044\u3002<\/li>\n
        • \u4f55\u304b\u554f\u984c\u304c\u8d77\u304d\u305f\u5834\u5408\u3001\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u8a08\u753b\u306f\u5b9f\u884c\u53ef\u80fd\u3067\u3042\u308b\u3002<\/li>\n<\/ul>\n

          \u8907\u96d1\u306a\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u65b0\u3057\u3044\u69cb\u9020\u306b\u65b0\u3057\u3044\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u307f\u306a\u304c\u3089\u3001\u53e4\u3044\u30c7\u30fc\u30bf\u3092\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u3067\u79fb\u884c\u3059\u308b\u4e8c\u91cd\u66f8\u304d\u8fbc\u307f\u6226\u7565\u3092\u63a1\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u304c\u3042\u308b\u3002\u3053\u308c\u306f\u4e00\u6642\u7684\u306b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\u306e\u8907\u96d1\u6027\u3092\u500d\u5897\u3055\u305b\u308b\u3002<\/p>\n

          4.2 \u4e00\u6642\u505c\u6b62\u3068\u53ef\u7528\u6027<\/h3>\n

          \u30c7\u30d5\u30a9\u30eb\u30c8\u4ed8\u304d\u306e\u5217\u3092\u8ffd\u52a0\u3057\u305f\u308a\u3001\u5927\u304d\u306a\u30c6\u30fc\u30d6\u30eb\u306e\u518d\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\u306a\u3069\u3001\u4e00\u90e8\u306e\u69cb\u9020\u7684\u5909\u66f4\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u30ed\u30c3\u30af\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\u9ad8\u53ef\u7528\u6027\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u3053\u308c\u3092\u53d7\u3051\u5165\u308c\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u3002\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306f\u3057\u3070\u3057\u3070\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u30b9\u30b1\u30b8\u30e5\u30fc\u30ea\u30f3\u30b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u3053\u308c\u306f\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3068\u53ce\u76ca\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3002<\/p>\n

          4.3 \u4eba\u7684\u8981\u56e0<\/h3>\n

          \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306f\u30c1\u30fc\u30e0\u306b\u3068\u3063\u3066\u5fc3\u7406\u7684\u306a\u51fa\u6765\u4e8b\u3067\u3082\u3042\u308b\u3002\u30b9\u30ad\u30fc\u30de\u306b\u3088\u3063\u3066\u5f15\u304d\u8d77\u3053\u3055\u308c\u308b\u7d99\u7d9a\u7684\u306a\u30c7\u30fc\u30bf\u30d0\u30b0\u306b\u5bfe\u51e6\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u5834\u5408\u3001\u58eb\u6c17\u306f\u4f4e\u4e0b\u3059\u308b\u3002\u5f7c\u3089\u306f\u30a4\u30f3\u30d5\u30e9\u3068\u6226\u3063\u3066\u3044\u308b\u3068\u611f\u3058\u3001\u4fa1\u5024\u3092\u5275\u9020\u3057\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3068\u611f\u3058\u308b\u3002\u660e\u78ba\u3067\u9069\u5207\u306b\u30e2\u30c7\u30eb\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u3001\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u5bfe\u3059\u308b\u4fe1\u983c\u3092\u56de\u5fa9\u3055\u305b\u308b\u3002<\/p>\n

          5. \u6226\u7565\u7684\u4e88\u9632\uff1a\u30ec\u30b8\u30ea\u30a8\u30f3\u30c8\u306a\u30e2\u30c7\u30eb\u306e\u69cb\u7bc9 \ud83d\udee1\ufe0f<\/h2>\n

          \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306f\u53ef\u80fd\u3060\u304c\u3001\u4e88\u9632\u306e\u65b9\u304c\u306f\u308b\u304b\u306b\u30b3\u30b9\u30c8\u52b9\u7387\u304c\u826f\u3044\u3002ERD\u4f5c\u6210\u306b\u53b3\u683c\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u53d6\u308b\u3053\u3068\u3067\u3001\u5927\u591a\u6570\u306e\u30ea\u30b9\u30af\u3092\u8efd\u6e1b\u3067\u304d\u308b\u3002<\/p>\n

          5.1 \u53cd\u5fa9\u7684\u8a2d\u8a08<\/h3>\n

          \u6700\u7d42\u8981\u4ef6\u3092\u5f85\u3063\u3066\u304b\u3089\u30b9\u30ad\u30fc\u30de\u3092\u8a2d\u8a08\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u5b89\u5b9a\u3057\u305f\u30b3\u30a2\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u95a2\u4fc2\u6027\u304b\u3089\u59cb\u3081\u307e\u3057\u3087\u3046\u3002\u30e2\u30c7\u30eb\u306e\u9032\u5316\u3092\u8a31\u53ef\u3057\u3066\u304f\u3060\u3055\u3044\u3002ERD\u3092\u6a5f\u80fd\u8981\u4ef6\u3068\u4e26\u884c\u3057\u3066\u66f4\u65b0\u3055\u308c\u308b\u52d5\u7684\u306a\u6587\u66f8\u3068\u3057\u3066\u6271\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n

          5.2 \u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u540c\u50da\u30ec\u30d3\u30e5\u30fc<\/h3>\n

          \u30b3\u30fc\u30c9\u304c\u30ec\u30d3\u30e5\u30fc\u3055\u308c\u308b\u3088\u3046\u306b\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u3082\u30ec\u30d3\u30e5\u30fc\u3055\u308c\u308b\u3079\u304d\u3067\u3042\u308b\u3002\u65b0\u3057\u3044\u76ee\u3067\u898b\u308b\u3053\u3068\u3067\u3001\u6b21\u306e\u70b9\u304c\u898b\u3064\u304b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\uff1a<\/p>\n

            \n
          • \u91cd\u8907\u3059\u308b\u30c7\u30fc\u30bf\u30d5\u30a3\u30fc\u30eb\u30c9\u3002<\/li>\n
          • \u30c6\u30fc\u30d6\u30eb\u9593\u306e\u6b20\u843d\u3057\u305f\u95a2\u4fc2\u6027\u3002<\/li>\n
          • \u6f5c\u5728\u7684\u306a\u540d\u524d\u885d\u7a81\u3002<\/li>\n
          • \u6b63\u898f\u5316\u30eb\u30fc\u30eb\u306e\u9055\u53cd\u3002<\/li>\n<\/ul>\n

            \u3053\u306e\u30ec\u30d3\u30e5\u30fc\u904e\u7a0b\u306b\u3088\u308a\u3001\u79fb\u884c\u30b3\u30fc\u30c9\u306e1\u884c\u3082\u66f8\u304b\u308c\u308b\u524d\u306b\u3001\u30e2\u30c7\u30eb\u304c\u30d3\u30b8\u30cd\u30b9\u306e\u610f\u56f3\u3068\u4e00\u81f4\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u308b\u3002<\/p>\n

            5.3 \u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u5316\u3068\u547d\u540d\u898f\u5247<\/h3>\n

            \u4e00\u8cab\u6027\u304c\u9375\u3067\u3042\u308b\u3002\u30c6\u30fc\u30d6\u30eb\u3068\u30ab\u30e9\u30e0\u306b\u5bfe\u3057\u3066\u53b3\u683c\u306a\u547d\u540d\u898f\u5247\u3092\u8a2d\u3051\u308b\u3002\u5e83\u304f\u7406\u89e3\u3055\u308c\u3066\u3044\u306a\u3044\u7565\u8a9e\u3092\u907f\u3051\u308b\u3002\u3059\u3079\u3066\u306e\u5916\u90e8\u30ad\u30fc\u306e\u80cc\u5f8c\u306b\u3042\u308b\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u3092\u6587\u66f8\u5316\u3059\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c1\u30fc\u30e0\u306b\u65b0\u3057\u304f\u52a0\u308f\u308b\u8ab0\u3082\u304c\u3001\u8cea\u554f\u305b\u305a\u306b\u30c7\u30fc\u30bf\u3092\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n

            6. \u30dd\u30b9\u30c8\u30e2\u30fc\u30c6\u30e0\u4e8b\u4f8b\uff1a\u5b66\u3073\u306e\u6574\u7406 \ud83d\udcdd<\/h2>\n

            \u60aa\u3044ERD\u8a2d\u8a08\u304c\u91cd\u5927\u306a\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3057\u305f\u4eee\u60f3\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3092\u691c\u8a0e\u3057\u3001\u907f\u3051\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u70b9\u3092\u660e\u3089\u304b\u306b\u3059\u308b\u3002<\/p>\n

            \u30b7\u30ca\u30ea\u30aaA\uff1a\u5b64\u7acb\u3057\u305f\u30ec\u30b3\u30fc\u30c9\u306e\u5371\u6a5f<\/h3>\n

            \u72b6\u6cc1\uff1a<\/strong>\u3042\u308b\u30c1\u30fc\u30e0\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u6ce8\u6587\u3068\u914d\u9001\u5148\u3092\u8ffd\u8de1\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u8a2d\u8a08\u3057\u305f\u3002\u66f8\u304d\u8fbc\u307f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u3001\u5916\u90e8\u30ad\u30fc\u5236\u7d04\u3092\u524a\u9664\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\u304c\u691c\u8a3c\u3092\u51e6\u7406\u3059\u308b\u3068\u4eee\u5b9a\u3057\u305f\u3002<\/p>\n

            \u5931\u6557\uff1a<\/strong>\u6642\u9593\u306e\u7d4c\u904e\u3068\u3068\u3082\u306b\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u524a\u9664\u3057\u305f\u304c\u6ce8\u6587\u306f\u4fdd\u6301\u3057\u305f\u3002\u914d\u9001\u5148\u304c\u5b64\u7acb\u3057\u305f\u72b6\u614b\u306b\u306a\u3063\u305f\u3002\u30c1\u30fc\u30e0\u304c\u7a0e\u52d9\u30ec\u30dd\u30fc\u30c8\u3092\u751f\u6210\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u30c7\u30fc\u30bf\u304c\u306a\u304f\u306a\u3063\u305f\u305f\u3081\u3001\u7d50\u5408\u304c\u5931\u6557\u3057\u305f\u3002<\/p>\n

            \u30b3\u30b9\u30c8\uff1a<\/strong>\u30c1\u30fc\u30e0\u306f\u3001\u5c65\u6b74\u30c7\u30fc\u30bf\u3092\u6c4e\u7528\u7684\u306a\u300c\u533f\u540d\u300d\u30e6\u30fc\u30b6\u30fc\u7528\u306e\u30d0\u30b1\u30c3\u30c8\u306b\u624b\u52d5\u3067\u30ea\u30f3\u30af\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u66f8\u304b\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u304b\u3063\u305f\u3002\u3053\u308c\u306b\u306f\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u4f5c\u696d\u30673\u65e5\u9593\u3092\u8981\u3057\u3001\u5b89\u5168\u306b\u30c6\u30b9\u30c8\u3059\u308b\u305f\u3081\u306b\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5b8c\u5168\u306a\u30c0\u30f3\u30d7\u3068\u5fa9\u5143\u304c\u5fc5\u8981\u3060\u3063\u305f\u3002<\/p>\n

            \u30b7\u30ca\u30ea\u30aaB\uff1a\u975e\u6b63\u898f\u5316\u306e\u7f60<\/h3>\n

            \u72b6\u6cc1\uff1a<\/strong>\u8aad\u307f\u53d6\u308a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u3001\u30c1\u30fc\u30e0\u306f\u30e6\u30fc\u30b6\u30fc\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u30c7\u30fc\u30bf\u3092\u6ce8\u6587\u30c6\u30fc\u30d6\u30eb\u306b\u30b3\u30d4\u30fc\u3057\u305f\u3002\u3053\u306e\u64cd\u4f5c\u306b\u3088\u308a\u30b8\u30e7\u30a4\u30f3\u51e6\u7406\u304c\u6e1b\u308b\u3068\u8003\u3048\u3066\u3044\u305f\u3002<\/p>\n

            \u5931\u6557\u306e\u539f\u56e0\uff1a<\/strong>\u30e6\u30fc\u30b6\u30fc\u304c\u540d\u524d\u3092\u66f4\u65b0\u3057\u305f\u969b\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u30e6\u30fc\u30b6\u30fc\u30c6\u30fc\u30d6\u30eb\u306f\u66f4\u65b0\u3057\u305f\u304c\u3001\u53e4\u3044\u540d\u524d\u3092\u542b\u3080\u6570\u5343\u4ef6\u306e\u6ce8\u6587\u30ec\u30b3\u30fc\u30c9\u306e\u66f4\u65b0\u306b\u5931\u6557\u3057\u305f\u3002\u30ec\u30dd\u30fc\u30c8\u3067\u306f\u3001\u540c\u3058\u30e6\u30fc\u30b6\u30fc\u306b\u5bfe\u3057\u3066\u540d\u524d\u304c\u4e00\u8cab\u6027\u306e\u306a\u3044\u72b6\u614b\u304c\u78ba\u8a8d\u3055\u308c\u305f\u3002<\/p>\n

            \u30b3\u30b9\u30c8\uff1a<\/strong>\u30c7\u30fc\u30bf\u306e\u4e00\u8cab\u6027\u304c\u5931\u308f\u308c\u305f\u3002\u30c1\u30fc\u30e0\u306f\u4e00\u8cab\u6027\u306e\u306a\u3044\u72b6\u614b\u3092\u53d7\u3051\u5165\u308c\u308b\u304b\u3001\u8907\u96d1\u306a\u30c8\u30ea\u30ac\u30fc\u6a5f\u69cb\u3092\u5c0e\u5165\u3057\u3066\u30c7\u30fc\u30bf\u3092\u540c\u671f\u3059\u308b\u304b\u306e\u9078\u629e\u3092\u8feb\u3089\u308c\u305f\u3002\u5f7c\u3089\u306f\u91cd\u8907\u3092\u524a\u9664\u3059\u308b\u305f\u3081\u306b\u30b9\u30ad\u30fc\u30de\u3092\u518d\u8a2d\u8a08\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u66f8\u304d\u8fbc\u307f\u30ed\u30b8\u30c3\u30af\u3092\u518d\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3092\u9078\u629e\u3057\u305f\u3002<\/p>\n

            \u30b7\u30ca\u30ea\u30aaC\uff1a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u898b\u843d\u3068\u3057<\/h3>\n

            \u72b6\u6cc1\uff1a<\/strong>\u6570\u767e\u4e07\u884c\u306e\u30c7\u30fc\u30bf\u3092\u6301\u3064\u30c6\u30fc\u30d6\u30eb\u4e0a\u3067\u691c\u7d22\u6a5f\u80fd\u304c\u69cb\u7bc9\u3055\u308c\u305f\u3002\u958b\u767a\u8005\u306f\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u3060\u3051\u3067\u5341\u5206\u3060\u3068\u8003\u3048\u3066\u3044\u305f\u3002<\/p>\n

            \u5931\u6557\u306e\u539f\u56e0\uff1a<\/strong>\u30c6\u30fc\u30d6\u30eb\u304c\u62e1\u5927\u3059\u308b\u306b\u3064\u308c\u3066\u3001\u691c\u7d22\u30ab\u30e9\u30e0\u306b\u5bfe\u3059\u308b\u30af\u30a8\u30ea\u304c\u6975\u7aef\u306b\u9045\u304f\u306a\u3063\u305f\u3002\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\u304f\u306a\u3063\u305f\u3002<\/p>\n

            \u30b3\u30b9\u30c8\uff1a<\/strong>\u30d4\u30fc\u30af\u6642\u9593\u5e2f\u306b\u30b7\u30b9\u30c6\u30e0\u304c\u4f7f\u7528\u4e0d\u80fd\u306b\u306a\u3063\u305f\u3002\u5f8c\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8ffd\u52a0\u3059\u308b\u306b\u306f\u9577\u6642\u9593\u5b9f\u884c\u3055\u308c\u308b\u64cd\u4f5c\u304c\u5fc5\u8981\u3068\u306a\u308a\u3001\u30c6\u30fc\u30d6\u30eb\u304c\u6570\u6642\u9593\u30ed\u30c3\u30af\u3055\u308c\u305f\u305f\u3081\u3001\u30b5\u30fc\u30d3\u30b9\u306e\u4e2d\u65ad\u304c\u767a\u751f\u3057\u305f\u3002<\/p>\n

            7. \u30c7\u30fc\u30bf\u30ec\u30a4\u30e4\u30fc\u306e\u5c06\u6765\u5bfe\u5fdc\u6027\u78ba\u4fdd \ud83d\udd2e<\/h2>\n

            \u3044\u304b\u306a\u308b\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u4f5c\u696d\u306e\u76ee\u7684\u3082\u3001\u5909\u5316\u306b\u8010\u3048\u3046\u308b\u57fa\u76e4\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u306b\u3042\u308b\u3002\u3069\u3093\u306a\u30b9\u30ad\u30fc\u30de\u3082\u6c38\u9060\u306b\u5b8c\u74a7\u3067\u3042\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u304c\u3001\u826f\u3044ERD\u306f\u9032\u5316\u306e\u660e\u78ba\u306a\u9053\u7b4b\u3092\u63d0\u4f9b\u3059\u308b\u3002<\/p>\n

              \n
            • \u30d0\u30fc\u30b8\u30e7\u30f3\u7ba1\u7406\uff1a<\/strong>\u30b9\u30ad\u30fc\u30de\u306e\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u30b3\u30fc\u30c9\u3068\u3057\u3066\u6271\u3046\u3002\u5909\u66f4\u5c65\u6b74\u3092\u8ffd\u8de1\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u30d0\u30fc\u30b8\u30e7\u30f3\u7ba1\u7406\u306b\u4fdd\u5b58\u3059\u308b\u3002<\/li>\n
            • \u81ea\u52d5\u30c6\u30b9\u30c8\uff1a<\/strong>CI\/CD\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306b\u30b9\u30ad\u30fc\u30de\u691c\u8a3c\u3092\u7d44\u307f\u8fbc\u3080\u3002\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u304c\u65e2\u5b58\u306e\u30af\u30a8\u30ea\u3092\u7834\u58ca\u3057\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n
            • \u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\uff1a<\/strong>\u30af\u30a8\u30ea\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u76e3\u8996\u3057\u3001\u6b20\u843d\u3057\u3066\u3044\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3084\u975e\u52b9\u7387\u306a\u7d50\u5408\u3092\u65e9\u671f\u306b\u7279\u5b9a\u3059\u308b\u3002<\/li>\n
            • \u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u306e\u6a19\u6e96\uff1a<\/strong>\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6280\u8853\u306b\u9069\u3057\u305f\u78ba\u7acb\u3055\u308c\u305f\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u5f93\u3044\u3001\u4e92\u63db\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u78ba\u4fdd\u3059\u308b\u3002<\/li>\n<\/ul>\n

              ERD\u30d5\u30a7\u30fc\u30ba\u306b\u6642\u9593\u3092\u6295\u8cc7\u3059\u308b\u3053\u3068\u306f\u9045\u5ef6\u3067\u306f\u306a\u304f\u3001\u52a0\u901f\u3067\u3042\u308b\u3002\u5c06\u6765\u306e\u958b\u767a\u306b\u304a\u3051\u308b\u6469\u64e6\u3092\u8efd\u6e1b\u3057\u3001\u30c7\u30fc\u30bf\u304c\u8ca0\u50b5\u3067\u306f\u306a\u304f\u4fe1\u983c\u3067\u304d\u308b\u8cc7\u7523\u306e\u307e\u307e\u3067\u3042\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u3002<\/p>\n

              \u7d50\u8ad6\uff1a\u7121\u77e5\u306e\u30b3\u30b9\u30c8\u3068\u8a08\u753b\u306e\u4fa1\u5024\u306e\u5bfe\u6bd4 \u2696\ufe0f<\/h2>\n

              \u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\u306f\u3001\u3057\u3070\u3057\u3070\u9045\u3059\u304e\u308b\u3068\u6c17\u3065\u304f\u307e\u3067\u898b\u3048\u306a\u3044\u3002\u305d\u308c\u306f\u6a5f\u80fd\u306e\u9045\u5ef6\u914d\u4fe1\u3001\u4e0d\u5b89\u5b9a\u306a\u672c\u756a\u74b0\u5883\u3001\u305d\u3057\u3066\u82db\u7acb\u3064\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30c1\u30fc\u30e0\u3068\u3057\u3066\u73fe\u308c\u308b\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u518d\u8a2d\u8a08\u306f\u3001\u6b63\u78ba\u3055\u3001\u8a08\u753b\u3001\u305d\u3057\u3066\u3057\u3070\u3057\u3070\u5927\u304d\u306a\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0\u3092\u8981\u3059\u308b\u9ad8\u30ea\u30b9\u30af\u306a\u4f5c\u696d\u3067\u3042\u308b\u3002<\/p>\n

              \u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u3092\u5358\u306a\u308b\u4e8b\u52d9\u4f5c\u696d\u3067\u306f\u306a\u304f\u3001\u91cd\u8981\u306a\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30bf\u30b9\u30af\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u3067\u3001\u7d44\u7e54\u306f\u6280\u8853\u7684\u8ca0\u50b5\u306e\u7f60\u3092\u56de\u907f\u3067\u304d\u308b\u3002\u826f\u597d\u306b\u8a2d\u8a08\u3055\u308c\u305f\u30b9\u30ad\u30fc\u30de\u306f\u5b88\u308a\u3068\u3057\u3066\u6a5f\u80fd\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u6210\u9577\u3057\u3066\u3082\u5805\u7262\u306a\u72b6\u614b\u3092\u4fdd\u3064\u3002\u3057\u3063\u304b\u308a\u3068\u3057\u305fERD\u3092\u8a2d\u8a08\u3059\u308b\u305f\u3081\u306e\u52aa\u529b\u306f\u3001\u305d\u306e\u5f8c\u306b\u66f8\u304b\u308c\u308b\u3059\u3079\u3066\u306e\u30b3\u30fc\u30c9\u3001\u5b9f\u884c\u3055\u308c\u308b\u3059\u3079\u3066\u306e\u30af\u30a8\u30ea\u3001\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u5bfe\u3057\u3066\u5229\u76ca\u3092\u3082\u305f\u3089\u3059\u3002<\/p>\n

              \u826f\u3044\u8a2d\u8a08\u56f3\u306e\u4fa1\u5024\u306b\u6c17\u4ed8\u304f\u306e\u306f\u3001\u4e8b\u5f8c\u5206\u6790\u306e\u5f8c\u3067\u306f\u9045\u3044\u3002\u6700\u521d\u304b\u3089\u660e\u78ba\u3055\u3001\u53b3\u5bc6\u3055\u3001\u305d\u3057\u3066\u30c7\u30fc\u30bf\u6574\u5408\u6027\u3078\u306e\u30b3\u30df\u30c3\u30c8\u30e1\u30f3\u30c8\u3092\u6301\u3063\u3066\u8a08\u753b\u3092\u59cb\u3081\u308b\u3079\u304d\u3060\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

              \u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30b7\u30b9\u30c6\u30e0\u304c\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3092\u59cb\u3081\u308b\u3068\u3001\u30c7\u30fc\u30bf\u5c64\u306f\u3057\u3070…<\/p>\n","protected":false},"author":1,"featured_media":100,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u518d\u8a2d\u8a08\u5206\u6790","_yoast_wpseo_metadesc":"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\u3092\u5206\u6790\u3059\u308b\u3002\u8a87\u5f35\u3092\u7528\u3044\u305a\u306b\u3001\u4e0d\u826f\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u304c\u518d\u8a2d\u8a08\u3001\u6642\u9593\u3001\u5b89\u5b9a\u6027\u306b\u4e0e\u3048\u308b\u5f71\u97ff\u3092\u5b66\u3076\u3002","inline_featured_image":false,"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[7],"tags":[8,13],"class_list":["post-99","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-erd","tag-academic","tag-erd"],"yoast_head":"\n\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u518d\u8a2d\u8a08\u5206\u6790<\/title>\n<meta name=\"description\" content=\"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\u3092\u5206\u6790\u3059\u308b\u3002\u8a87\u5f35\u3092\u7528\u3044\u305a\u306b\u3001\u4e0d\u826f\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u304c\u518d\u8a2d\u8a08\u3001\u6642\u9593\u3001\u5b89\u5b9a\u6027\u306b\u4e0e\u3048\u308b\u5f71\u97ff\u3092\u5b66\u3076\u3002\" \/>\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.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u518d\u8a2d\u8a08\u5206\u6790\" \/>\n<meta property=\"og:description\" content=\"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\u3092\u5206\u6790\u3059\u308b\u3002\u8a87\u5f35\u3092\u7528\u3044\u305a\u306b\u3001\u4e0d\u826f\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u304c\u518d\u8a2d\u8a08\u3001\u6642\u9593\u3001\u5b89\u5b9a\u6027\u306b\u4e0e\u3048\u308b\u5f71\u97ff\u3092\u5b66\u3076\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/\" \/>\n<meta property=\"og:site_name\" content=\"We Notes \u65e5\u672c\u8a9e\u2013 Collaborative AI Insights & Intelligence Hub\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-02T13:34:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/04\/hidden-cost-poor-erd-diagrams-infographic-charcoal-sketch.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=\"\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/\"},\"author\":{\"name\":\"vpadmin\",\"@id\":\"https:\/\/www.we-notes.com\/ja\/#\/schema\/person\/6fb9f9e55a3031c51049e541adf4642c\"},\"headline\":\"\u52a3\u60aa\u306aER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u4e8b\u5f8c\u5206\u6790\",\"datePublished\":\"2026-04-02T13:34:38+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/\"},\"wordCount\":26,\"publisher\":{\"@id\":\"https:\/\/www.we-notes.com\/ja\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/04\/hidden-cost-poor-erd-diagrams-infographic-charcoal-sketch.jpg\",\"keywords\":[\"academic\",\"erd\"],\"articleSection\":[\"ERD\"],\"inLanguage\":\"ja\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/\",\"url\":\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/\",\"name\":\"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u518d\u8a2d\u8a08\u5206\u6790\",\"isPartOf\":{\"@id\":\"https:\/\/www.we-notes.com\/ja\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/04\/hidden-cost-poor-erd-diagrams-infographic-charcoal-sketch.jpg\",\"datePublished\":\"2026-04-02T13:34:38+00:00\",\"description\":\"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\u3092\u5206\u6790\u3059\u308b\u3002\u8a87\u5f35\u3092\u7528\u3044\u305a\u306b\u3001\u4e0d\u826f\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u304c\u518d\u8a2d\u8a08\u3001\u6642\u9593\u3001\u5b89\u5b9a\u6027\u306b\u4e0e\u3048\u308b\u5f71\u97ff\u3092\u5b66\u3076\u3002\",\"breadcrumb\":{\"@id\":\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#primaryimage\",\"url\":\"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/04\/hidden-cost-poor-erd-diagrams-infographic-charcoal-sketch.jpg\",\"contentUrl\":\"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/04\/hidden-cost-poor-erd-diagrams-infographic-charcoal-sketch.jpg\",\"width\":1664,\"height\":928},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.we-notes.com\/ja\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u52a3\u60aa\u306aER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u4e8b\u5f8c\u5206\u6790\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.we-notes.com\/ja\/#website\",\"url\":\"https:\/\/www.we-notes.com\/ja\/\",\"name\":\"We Notes \u65e5\u672c\u8a9e\u2013 Collaborative AI Insights & Intelligence Hub\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.we-notes.com\/ja\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.we-notes.com\/ja\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ja\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.we-notes.com\/ja\/#organization\",\"name\":\"We Notes \u65e5\u672c\u8a9e\u2013 Collaborative AI Insights & Intelligence Hub\",\"url\":\"https:\/\/www.we-notes.com\/ja\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\/\/www.we-notes.com\/ja\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/03\/we-notes-logo.png\",\"contentUrl\":\"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/03\/we-notes-logo.png\",\"width\":1042,\"height\":322,\"caption\":\"We Notes \u65e5\u672c\u8a9e\u2013 Collaborative AI Insights & Intelligence Hub\"},\"image\":{\"@id\":\"https:\/\/www.we-notes.com\/ja\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.we-notes.com\/ja\/#\/schema\/person\/6fb9f9e55a3031c51049e541adf4642c\",\"name\":\"vpadmin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\/\/www.we-notes.com\/ja\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/56e0eb902506d9cea7c7e209205383146b8e81c0ef2eff693d9d5e0276b3d7e3?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/56e0eb902506d9cea7c7e209205383146b8e81c0ef2eff693d9d5e0276b3d7e3?s=96&d=mm&r=g\",\"caption\":\"vpadmin\"},\"sameAs\":[\"https:\/\/www.we-notes.com\"],\"url\":\"https:\/\/www.we-notes.com\/ja\/author\/vpadmin\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u518d\u8a2d\u8a08\u5206\u6790","description":"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\u3092\u5206\u6790\u3059\u308b\u3002\u8a87\u5f35\u3092\u7528\u3044\u305a\u306b\u3001\u4e0d\u826f\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u304c\u518d\u8a2d\u8a08\u3001\u6642\u9593\u3001\u5b89\u5b9a\u6027\u306b\u4e0e\u3048\u308b\u5f71\u97ff\u3092\u5b66\u3076\u3002","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/","og_locale":"ja_JP","og_type":"article","og_title":"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u518d\u8a2d\u8a08\u5206\u6790","og_description":"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\u3092\u5206\u6790\u3059\u308b\u3002\u8a87\u5f35\u3092\u7528\u3044\u305a\u306b\u3001\u4e0d\u826f\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u304c\u518d\u8a2d\u8a08\u3001\u6642\u9593\u3001\u5b89\u5b9a\u6027\u306b\u4e0e\u3048\u308b\u5f71\u97ff\u3092\u5b66\u3076\u3002","og_url":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/","og_site_name":"We Notes \u65e5\u672c\u8a9e\u2013 Collaborative AI Insights & Intelligence Hub","article_published_time":"2026-04-02T13:34:38+00:00","og_image":[{"width":1664,"height":928,"url":"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/04\/hidden-cost-poor-erd-diagrams-infographic-charcoal-sketch.jpg","type":"image\/jpeg"}],"author":"vpadmin","twitter_card":"summary_large_image","twitter_misc":{"\u57f7\u7b46\u8005":false},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#article","isPartOf":{"@id":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/"},"author":{"name":"vpadmin","@id":"https:\/\/www.we-notes.com\/ja\/#\/schema\/person\/6fb9f9e55a3031c51049e541adf4642c"},"headline":"\u52a3\u60aa\u306aER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u4e8b\u5f8c\u5206\u6790","datePublished":"2026-04-02T13:34:38+00:00","mainEntityOfPage":{"@id":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/"},"wordCount":26,"publisher":{"@id":"https:\/\/www.we-notes.com\/ja\/#organization"},"image":{"@id":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#primaryimage"},"thumbnailUrl":"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/04\/hidden-cost-poor-erd-diagrams-infographic-charcoal-sketch.jpg","keywords":["academic","erd"],"articleSection":["ERD"],"inLanguage":"ja"},{"@type":"WebPage","@id":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/","url":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/","name":"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u518d\u8a2d\u8a08\u5206\u6790","isPartOf":{"@id":"https:\/\/www.we-notes.com\/ja\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#primaryimage"},"image":{"@id":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#primaryimage"},"thumbnailUrl":"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/04\/hidden-cost-poor-erd-diagrams-infographic-charcoal-sketch.jpg","datePublished":"2026-04-02T13:34:38+00:00","description":"\u60aa\u3044ER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\u3092\u5206\u6790\u3059\u308b\u3002\u8a87\u5f35\u3092\u7528\u3044\u305a\u306b\u3001\u4e0d\u826f\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u304c\u518d\u8a2d\u8a08\u3001\u6642\u9593\u3001\u5b89\u5b9a\u6027\u306b\u4e0e\u3048\u308b\u5f71\u97ff\u3092\u5b66\u3076\u3002","breadcrumb":{"@id":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#breadcrumb"},"inLanguage":"ja","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/"]}]},{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#primaryimage","url":"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/04\/hidden-cost-poor-erd-diagrams-infographic-charcoal-sketch.jpg","contentUrl":"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/04\/hidden-cost-poor-erd-diagrams-infographic-charcoal-sketch.jpg","width":1664,"height":928},{"@type":"BreadcrumbList","@id":"https:\/\/www.we-notes.com\/ja\/hidden-cost-poor-erd-diagrams-refactoring\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.we-notes.com\/ja\/"},{"@type":"ListItem","position":2,"name":"\u52a3\u60aa\u306aER\u56f3\u306e\u96a0\u308c\u305f\u30b3\u30b9\u30c8\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u4e8b\u5f8c\u5206\u6790"}]},{"@type":"WebSite","@id":"https:\/\/www.we-notes.com\/ja\/#website","url":"https:\/\/www.we-notes.com\/ja\/","name":"We Notes \u65e5\u672c\u8a9e\u2013 Collaborative AI Insights & Intelligence Hub","description":"","publisher":{"@id":"https:\/\/www.we-notes.com\/ja\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.we-notes.com\/ja\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ja"},{"@type":"Organization","@id":"https:\/\/www.we-notes.com\/ja\/#organization","name":"We Notes \u65e5\u672c\u8a9e\u2013 Collaborative AI Insights & Intelligence Hub","url":"https:\/\/www.we-notes.com\/ja\/","logo":{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/www.we-notes.com\/ja\/#\/schema\/logo\/image\/","url":"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/03\/we-notes-logo.png","contentUrl":"https:\/\/www.we-notes.com\/ja\/wp-content\/uploads\/sites\/21\/2026\/03\/we-notes-logo.png","width":1042,"height":322,"caption":"We Notes \u65e5\u672c\u8a9e\u2013 Collaborative AI Insights & Intelligence Hub"},"image":{"@id":"https:\/\/www.we-notes.com\/ja\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.we-notes.com\/ja\/#\/schema\/person\/6fb9f9e55a3031c51049e541adf4642c","name":"vpadmin","image":{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/www.we-notes.com\/ja\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/56e0eb902506d9cea7c7e209205383146b8e81c0ef2eff693d9d5e0276b3d7e3?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/56e0eb902506d9cea7c7e209205383146b8e81c0ef2eff693d9d5e0276b3d7e3?s=96&d=mm&r=g","caption":"vpadmin"},"sameAs":["https:\/\/www.we-notes.com"],"url":"https:\/\/www.we-notes.com\/ja\/author\/vpadmin\/"}]}},"_links":{"self":[{"href":"https:\/\/www.we-notes.com\/ja\/wp-json\/wp\/v2\/posts\/99","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.we-notes.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.we-notes.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.we-notes.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.we-notes.com\/ja\/wp-json\/wp\/v2\/comments?post=99"}],"version-history":[{"count":0,"href":"https:\/\/www.we-notes.com\/ja\/wp-json\/wp\/v2\/posts\/99\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.we-notes.com\/ja\/wp-json\/wp\/v2\/media\/100"}],"wp:attachment":[{"href":"https:\/\/www.we-notes.com\/ja\/wp-json\/wp\/v2\/media?parent=99"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.we-notes.com\/ja\/wp-json\/wp\/v2\/categories?post=99"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.we-notes.com\/ja\/wp-json\/wp\/v2\/tags?post=99"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}