{"id":1658,"date":"2026-04-07T17:58:38","date_gmt":"2026-04-07T17:58:38","guid":{"rendered":"https:\/\/www.viz-note.com\/cn\/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\/cn\/erd-performance-myth-buster\/","title":{"rendered":"\u7834\u9664\u8ff7\u601d\uff1a\u5b8c\u7f8e\u7684\u5b9e\u4f53\u5173\u7cfb\u56fe\u80fd\u5426\u4fdd\u8bc1\u5e94\u7528\u5feb\u901f\u54cd\u5e94\uff1f"},"content":{"rendered":"

\u5728\u8f6f\u4ef6\u67b6\u6784\u9886\u57df\uff0c\u5f88\u5c11\u6709\u6982\u5ff5\u80fd\u50cf\u5b9e\u4f53\u5173\u7cfb\u56fe\uff08ERD\uff09\u4e00\u6837\u5177\u6709\u5982\u6b64\u91cd\u8981\u7684\u5206\u91cf\u3002\u5b83\u662f\u60a8\u6570\u636e\u7684\u84dd\u56fe\uff0c\u662f\u5f15\u5bfc\u5f00\u53d1\u4eba\u5458\u7a7f\u8d8a\u8868\u3001\u952e\u548c\u5173\u7cfb\u590d\u6742\u5730\u5f62\u7684\u5730\u56fe\u3002\u5f53\u5e94\u7528\u7a0b\u5e8f\u51fa\u73b0\u5ef6\u8fdf\u65f6\uff0c\u4eba\u4eec\u7684\u7b2c\u4e00\u53cd\u5e94\u5f80\u5f80\u662f\u5f52\u548e\u4e8e\u6a21\u5f0f\u8bbe\u8ba1\u3002\u8fd9\u79cd\u5047\u8bbe\u975e\u5e38\u660e\u786e\uff1a\u5982\u679c\u56fe\u8868\u5b8c\u7f8e\uff0c\u6027\u80fd\u5c31\u5fc5\u7136\u5b8c\u7f8e\u3002<\/p>\n

\u8fd9\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u8bef\u89e3\u3002\ud83e\uddd0 \u867d\u7136\u8bbe\u8ba1\u826f\u597d\u7684ERD\u662f\u57fa\u7840\uff0c\u4f46\u5b83\u5e76\u975e\u63d0\u5347\u901f\u5ea6\u7684\u4e07\u80fd\u94a5\u5319\u3002\u4e00\u4e2a\u5b8c\u7f8e\u7684\u903b\u8f91\u6a21\u578b\u5e76\u4e0d\u4f1a\u81ea\u52a8\u8f6c\u5316\u4e3a\u9ad8\u901f\u7684\u7269\u7406\u6267\u884c\u3002\u7406\u89e3\u8bbe\u8ba1\u7406\u8bba\u4e0e\u8fd0\u884c\u65f6\u73b0\u5b9e\u4e4b\u95f4\u7684\u5dee\u8ddd\uff0c\u5bf9\u4e8e\u6784\u5efa\u5728\u538b\u529b\u4e0b\u4ecd\u80fd\u4fdd\u6301\u54cd\u5e94\u6027\u7684\u7cfb\u7edf\u81f3\u5173\u91cd\u8981\u3002<\/p>\n

\u672c\u6307\u5357\u5c06\u63a2\u8ba8\u4e3a\u4f55\u5b8c\u7f8e\u7684ERD\u5e76\u4e0d\u80fd\u4fdd\u8bc1\u5feb\u901f\u54cd\u5e94\u65f6\u95f4\uff0c\u4ee5\u53ca\u54ea\u4e9b\u5176\u4ed6\u5173\u952e\u56e0\u7d20\u4f1a\u5f71\u54cd\u6570\u636e\u5e93\u6027\u80fd\u3002\u6211\u4eec\u5c06\u5256\u6790\u4ece\u5b58\u50a8\u5f15\u64ce\u5230\u7f51\u7edc\u5ef6\u8fdf\u7684\u6570\u636e\u5904\u7406\u5c42\u6b21\uff0c\u63ed\u793a\u5e94\u7528\u901f\u5ea6\u7684\u771f\u5b9e\u9a71\u52a8\u56e0\u7d20\u3002<\/p>\n

\n
\"Line<\/figure>\n<\/div>\n

\ud83d\udcd0 \u7406\u89e3\u5b9e\u4f53\u5173\u7cfb\u56fe<\/h2>\n

\u5728\u6df1\u5165\u6027\u80fd\u6307\u6807\u4e4b\u524d\uff0c\u6211\u4eec\u5fc5\u987b\u660e\u786eERD\u5b9e\u9645\u4e0a\u4ee3\u8868\u4ec0\u4e48\u3002ERD\u662f\u4e00\u79cd\u903b\u8f91\u4ea7\u7269\u3002\u5b83\u63cf\u8ff0\u4e86\u4ec0\u4e48<\/strong>\u6570\u636e\u5b58\u5728\uff0c\u4ee5\u53ca\u5982\u4f55<\/strong>\u5b83\u4e0e\u5176\u4ed6\u6570\u636e\u4e4b\u95f4\u7684\u5173\u7cfb\u3002\u5b83\u5b9a\u4e49\u4e86\u5b9e\u4f53\uff08\u8868\uff09\u3001\u5c5e\u6027\uff08\u5217\uff09\u548c\u5173\u7cfb\uff08\u5916\u952e\uff09\u3002<\/p>\n

    \n
  • \u5b9e\u4f53\uff1a<\/strong>\u4ee5\u8868\u5f62\u5f0f\u8868\u793a\u7684\u73b0\u5b9e\u4e16\u754c\u5bf9\u8c61\u3002<\/li>\n
  • \u5c5e\u6027\uff1a<\/strong>\u8fd9\u4e9b\u5bf9\u8c61\u7684\u7279\u5f81\uff0c\u5b58\u50a8\u5728\u5217\u4e2d\u3002<\/li>\n
  • \u5173\u7cfb\uff1a<\/strong>\u5b9e\u4f53\u4e4b\u95f4\u7684\u8fde\u63a5\uff0c\u901a\u5e38\u901a\u8fc7\u4e3b\u952e\u548c\u5916\u952e\u5f3a\u5236\u6267\u884c\u3002<\/li>\n
  • \u57fa\u6570\uff1a<\/strong>\u5b9e\u4f53\u4e4b\u95f4\u7684\u6570\u503c\u5173\u7cfb\uff08\u4e00\u5bf9\u4e00\u3001\u4e00\u5bf9\u591a\uff09\u3002<\/li>\n<\/ul>\n

    ERD\u7684\u4e3b\u8981\u76ee\u6807\u662f\u6570\u636e\u5b8c\u6574\u6027\u3002\u5b83\u786e\u4fdd\u6570\u636e\u5728\u957f\u65f6\u95f4\u5185\u4fdd\u6301\u4e00\u81f4\u3001\u51c6\u786e\u4e14\u53ef\u7528\u3002\u5b83\u9632\u6b62\u5b64\u7acb\u8bb0\u5f55\u7684\u4ea7\u751f\uff0c\u5e76\u7ef4\u62a4\u5f15\u7528\u5b8c\u6574\u6027\u3002\u7136\u800c\uff0c\u5b8c\u6574\u6027\u5e76\u4e0d\u7b49\u540c\u4e8e\u901f\u5ea6\u3002\u4e00\u628a\u9501\u80fd\u5173\u7d27\u95e8\u4ee5\u4fdd\u62a4\u95e8\u5185\u7269\u54c1\uff0c\u4f46\u5e76\u4e0d\u80fd\u8ba9\u95e8\u5f00\u5f97\u66f4\u5feb\u3002<\/p>\n

    \u26a1 \u6027\u80fd\u65b9\u7a0b\uff1a\u8d85\u8d8a\u6a21\u5f0f\u8bbe\u8ba1<\/h2>\n

    \u5e94\u7528\u7a0b\u5e8f\u54cd\u5e94\u65f6\u95f4\u7531\u591a\u4e2a\u7ec4\u4ef6\u5171\u540c\u6784\u6210\u3002\u6570\u636e\u5e93\u53ea\u662f\u8fd9\u4e2a\u65b9\u7a0b\u4e2d\u7684\u4e00\u90e8\u5206\u3002\u5373\u4f7f\u6570\u636e\u5e93\u5f15\u64ce\u80fd\u77ac\u95f4\u83b7\u53d6\u6570\u636e\uff0c\u5e94\u7528\u7a0b\u5e8f\u4ecd\u53ef\u80fd\u56e0\u5176\u4ed6\u5730\u65b9\u7684\u74f6\u9888\u800c\u663e\u5f97\u7f13\u6162\u3002<\/p>\n

    \u4ee5\u4e0b\u662f\u5f71\u54cd\u901f\u5ea6\u7684\u5173\u952e\u56e0\u7d20\uff0c\u5e38\u5e38\u76d6\u8fc7\u6a21\u5f0f\u8bbe\u8ba1\u7684\u5f71\u54cd\uff1a<\/p>\n

    1. \u7d22\u5f15\u7b56\u7565<\/h3>\n

    ERD\u5b9a\u4e49\u4e86\u4e3b\u952e\u548c\u5916\u952e\uff0c\u8fd9\u4e9b\u901a\u5e38\u4f1a\u81ea\u52a8\u751f\u6210\u7d22\u5f15\u3002\u7136\u800c\uff0c\u8fd9\u4e9b\u9ed8\u8ba4\u7d22\u5f15\u5f88\u5c11\u80fd\u6ee1\u8db3\u590d\u6742\u67e5\u8be2\u7684\u9700\u6c42\u3002\u6027\u80fd\u5f88\u5927\u7a0b\u5ea6\u4e0a\u4f9d\u8d56\u4e8e\u9488\u5bf9\u7279\u5b9a\u67e5\u8be2\u6a21\u5f0f\u5b9a\u5236\u7684\u4e8c\u7ea7\u7d22\u5f15\u3002<\/p>\n

      \n
    • \u7f3a\u5931\u7d22\u5f15\uff1a<\/strong>\u5982\u679c\u5728\u9891\u7e41\u8fc7\u6ee4\u7684\u5217\u4e0a\u6ca1\u6709\u7d22\u5f15\uff0c\u6570\u636e\u5e93\u5fc5\u987b\u6267\u884c\u5168\u8868\u626b\u63cf\u3002\u8fd9\u4f1a\u8bfb\u53d6\u6bcf\u4e00\u884c\u6570\u636e\uff0c\u5728\u5927\u578b\u6570\u636e\u96c6\u4e0a\u901f\u5ea6\u5448\u6307\u6570\u7ea7\u4e0b\u964d\u3002<\/li>\n
    • \u7d22\u5f15\u5f00\u9500\uff1a<\/strong>\u7d22\u5f15\u8fc7\u591a\u4f1a\u51cf\u6162\u5199\u64cd\u4f5c\u3002\u6bcf\u6b21\u63d2\u5165\u6216\u66f4\u65b0\u90fd\u5fc5\u987b\u66f4\u65b0\u4e0e\u8be5\u8868\u76f8\u5173\u7684\u6bcf\u4e00\u4e2a\u7d22\u5f15\u3002<\/li>\n
    • \u9009\u62e9\u6027\uff1a<\/strong>\u5728\u9009\u62e9\u6027\u8f83\u4f4e\u7684\u5217\uff08\u5982\u6027\u522b\u6216\u72b6\u6001\uff09\u4e0a\u5efa\u7acb\u7684\u7d22\u5f15\uff0c\u53ef\u80fd\u88ab\u67e5\u8be2\u4f18\u5316\u5668\u5ffd\u7565\u3002<\/li>\n<\/ul>\n

      2. \u67e5\u8be2\u4f18\u5316<\/h3>\n

      \u6570\u636e\u8bf7\u6c42\u7684\u65b9\u5f0f\u6bd4\u5b58\u50a8\u65b9\u5f0f\u66f4\u91cd\u8981\u3002\u4e00\u4e2a\u7f16\u5199\u4e0d\u4f73\u7684\u67e5\u8be2\u53ef\u80fd\u4f1a\u7834\u574f\u4e00\u4e2a\u5b8c\u7f8e\u7684\u6a21\u5f0f\u3002\u5e38\u89c1\u95ee\u9898\u5305\u62ec\uff1a<\/p>\n

        \n
      • N+1 \u95ee\u9898\uff1a<\/strong>\u5148\u83b7\u53d6\u7236\u8bb0\u5f55\uff0c\u7136\u540e\u5faa\u73af\u904d\u5386\u4ee5\u5355\u72ec\u83b7\u53d6\u5b50\u8bb0\u5f55\u3002\u8fd9\u4f1a\u4ea7\u751f\u591a\u6b21\u6570\u636e\u5e93\u5f80\u8fd4\u64cd\u4f5c\uff0c\u800c\u4e0d\u662f\u4e00\u6b21 JOIN \u64cd\u4f5c\u3002<\/li>\n
      • SELECT * \u7684\u4f7f\u7528\uff1a<\/strong>\u83b7\u53d6\u6240\u6709\u5217\u4f1a\u589e\u52a0\u7f51\u7edc\u6d41\u91cf\u548c\u5185\u5b58\u4f7f\u7528\uff0c\u5373\u4f7f\u53ea\u9700\u8981\u5176\u4e2d\u4e00\u5217\u3002<\/li>\n
      • \u9690\u5f0f\u8f6c\u6362\uff1a<\/strong>\u5c06\u5b57\u7b26\u4e32\u4e0e\u6570\u5b57\u6bd4\u8f83\uff0c\u6216\u5c06\u65e5\u671f\u4e0e\u65f6\u95f4\u6233\u6bd4\u8f83\uff0c\u53ef\u80fd\u4f1a\u963b\u6b62\u7d22\u5f15\u7684\u4f7f\u7528\u3002<\/li>\n
      • \u590d\u6742\u7684 JOIN \u64cd\u4f5c\uff1a<\/strong>\u5728\u6ca1\u6709\u9002\u5f53\u8fc7\u6ee4\u7684\u60c5\u51b5\u4e0b\u8fde\u63a5\u591a\u4e2a\u5927\u578b\u8868\uff0c\u4f1a\u663e\u8457\u589e\u52a0\u8ba1\u7b97\u8d1f\u8f7d\u3002<\/li>\n<\/ul>\n

        3. \u786c\u4ef6\u4e0e\u57fa\u7840\u8bbe\u65bd<\/h3>\n

        \u8f6f\u4ef6\u6548\u7387\u65e0\u6cd5\u514b\u670d\u7269\u7406\u9650\u5236\u3002\u5e95\u5c42\u786c\u4ef6\u51b3\u5b9a\u4e86\u6027\u80fd\u7684\u4e0a\u9650\u3002<\/p>\n

          \n
        • \u5b58\u50a8\u7c7b\u578b\uff1a<\/strong>\u56fa\u6001\u786c\u76d8\uff08SSD\uff09\u5728\u968f\u673a I\/O \u64cd\u4f5c\u4e0a\u660e\u663e\u5feb\u4e8e\u673a\u68b0\u786c\u76d8\uff08HDD\uff09\u3002<\/li>\n
        • \u5185\u5b58\uff08RAM\uff09\uff1a<\/strong>\u5982\u679c\u6570\u636e\u7684\u5de5\u4f5c\u96c6\u80fd\u591f\u653e\u5165 RAM\uff0c\u67e5\u8be2\u51e0\u4e4e\u662f\u77ac\u65f6\u7684\u3002\u5982\u679c\u6570\u636e\u5fc5\u987b\u4ece\u78c1\u76d8\u8bfb\u53d6\uff0c\u5ef6\u8fdf\u5c31\u4f1a\u589e\u52a0\u3002<\/li>\n
        • CPU \u6027\u80fd\uff1a<\/strong>\u590d\u6742\u7684\u8ba1\u7b97\u3001\u6392\u5e8f\u548c\u805a\u5408\u9700\u8981\u5f3a\u5927\u7684\u5904\u7406\u80fd\u529b\u3002<\/li>\n
        • \u7f51\u7edc\u5ef6\u8fdf\uff1a<\/strong>\u5e94\u7528\u670d\u52a1\u5668\u4e0e\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u8ddd\u79bb\u4f1a\u4f7f\u6bcf\u6b21\u8bf7\u6c42\u589e\u52a0\u6beb\u79d2\u7ea7\u7684\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n

          4. \u5e76\u53d1\u4e0e\u9501\u673a\u5236<\/h3>\n

          \u5f53\u591a\u4e2a\u7528\u6237\u540c\u65f6\u8bbf\u95ee\u7cfb\u7edf\u65f6\uff0c\u6570\u636e\u5e93\u5fc5\u987b\u7ba1\u7406\u51b2\u7a81\u3002\u8fd9\u6b63\u662f\u6027\u80fd\u5e38\u5e38\u4e0b\u964d\u7684\u5730\u65b9\u3002<\/p>\n

            \n
          • \u9501\u4e89\u7528\uff1a<\/strong>\u5982\u679c\u4e00\u4e2a\u4e8b\u52a1\u6301\u6709\u67d0\u884c\u7684\u9501\uff0c\u5176\u4ed6\u4e8b\u52a1\u5c31\u5fc5\u987b\u7b49\u5f85\u3002\u9ad8\u4e89\u7528\u4f1a\u5bfc\u81f4\u8d85\u65f6\u548c\u54cd\u5e94\u7f13\u6162\u3002<\/li>\n
          • \u6b7b\u9501\uff1a<\/strong>\u4e24\u4e2a\u4e8b\u52a1\u76f8\u4e92\u7b49\u5f85\uff0c\u53ef\u80fd\u5bfc\u81f4\u7cfb\u7edf\u5168\u9762\u505c\u6b62\u3002<\/li>\n
          • \u9694\u79bb\u7ea7\u522b\uff1a<\/strong>\u66f4\u9ad8\u7684\u9694\u79bb\u7ea7\u522b\uff08\u4f8b\u5982\u53ef\u4e32\u884c\u5316\uff09\u63d0\u4f9b\u66f4\u5f3a\u7684\u4e00\u81f4\u6027\u4fdd\u8bc1\uff0c\u4f46\u4f1a\u964d\u4f4e\u5e76\u53d1\u6027\u548c\u901f\u5ea6\u3002<\/li>\n<\/ul>\n

            \ud83d\udcca ERD \u5f71\u54cd\u4e0e\u5176\u5b83\u6027\u80fd\u56e0\u7d20\u5bf9\u6bd4<\/h2>\n

            \u4e3a\u4e86\u76f4\u89c2\u5c55\u793a ERD \u76f8\u8f83\u4e8e\u5176\u4ed6\u53d8\u91cf\u7684\u5f71\u54cd\uff0c\u53ef\u53c2\u8003\u4ee5\u4e0b\u5206\u89e3\u3002\u8be5\u8868\u683c\u7a81\u51fa\u4e86 ERD \u63d0\u4f9b\u4ef7\u503c\u7684\u5730\u65b9\u4ee5\u53ca\u5176\u4e0d\u8db3\u4e4b\u5904\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n
            \u56e0\u7d20<\/th>\n\u5bf9\u8bfb\u53d6\u901f\u5ea6\u7684\u5f71\u54cd<\/th>\n\u5bf9\u5199\u5165\u901f\u5ea6\u7684\u5f71\u54cd<\/th>\nERD \u7684\u4f5c\u7528<\/th>\n<\/tr>\n<\/thead>\n
            \u8868\u7ed3\u6784\u6a21\u5f0f<\/td>\n\u4e2d\u7b49<\/td>\n\u4e2d\u7b49<\/td>\n\u5b9a\u4e49\u5173\u7cfb\u548c\u89c4\u8303\u5316\u3002<\/td>\n<\/tr>\n
            \u7d22\u5f15<\/td>\n\u9ad8<\/td>\n\u4f4e<\/td>\nERD \u5b9a\u4e49\u952e\uff0c\u4f46\u5e76\u975e\u6240\u6709\u7d22\u5f15\u3002<\/td>\n<\/tr>\n
            \u67e5\u8be2\u903b\u8f91<\/td>\n\u975e\u5e38\u9ad8<\/td>\n\u4e2d\u7b49<\/td>\nERD \u4e0d\u89c4\u5b9a\u67e5\u8be2\u8bed\u6cd5\u3002<\/td>\n<\/tr>\n
            \u786c\u4ef6\u8d44\u6e90<\/td>\n\u9ad8<\/td>\n\u9ad8<\/td>\n\u65e0\u3002\u4e0e\u6a21\u5f0f\u65e0\u5173\u3002<\/td>\n<\/tr>\n
            \u7f51\u7edc\u5ef6\u8fdf<\/td>\n\u9ad8<\/td>\n\u4e2d\u7b49<\/td>\n\u65e0\u3002\u4e0e\u6a21\u5f0f\u65e0\u5173\u3002<\/td>\n<\/tr>\n
            \u8fde\u63a5\u6c60<\/td>\n\u4e2d\u7b49<\/td>\n\u4e2d\u7b49<\/td>\n\u65e0\u3002\u7531\u5e94\u7528\u7a0b\u5e8f\u914d\u7f6e\u51b3\u5b9a\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

            \ud83e\uddf1 \u89c4\u8303\u5316\u7684\u6743\u8861<\/h2>\n

            \u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\u6700\u53d7\u4e89\u8bae\u7684\u8bdd\u9898\u4e4b\u4e00\u662f\u89c4\u8303\u5316\u3002ERD \u901a\u5e38\u4ee5\u7b2c\u4e09\u8303\u5f0f\uff083NF\uff09\u4e3a\u76ee\u6807\uff0c\u4ee5\u51cf\u5c11\u5197\u4f59\u3002\u867d\u7136\u8fd9\u53ef\u4ee5\u8282\u7701\u7a7a\u95f4\u5e76\u786e\u4fdd\u4e00\u81f4\u6027\uff0c\u4f46\u53ef\u80fd\u4f1a\u5f71\u54cd\u6027\u80fd\u3002<\/p>\n

            \u5f53\u6570\u636e\u9ad8\u5ea6\u89c4\u8303\u5316\u65f6\uff0c\u4e00\u6761\u4fe1\u606f\u4ec5\u5b58\u50a8\u5728\u4e00\u4e2a\u4f4d\u7f6e\u3002\u8981\u68c0\u7d22\u5b83\uff0c\u7cfb\u7edf\u5fc5\u987b\u904d\u5386\u591a\u4e2aJOIN\u64cd\u4f5c\u3002\u6bcf\u6b21JOIN\u90fd\u4f1a\u589e\u52a0\u8ba1\u7b97\u5f00\u9500\u3002<\/p>\n

            \u8bbe\u60f3\u4e00\u4e2a\u573a\u666f\uff1a\u4f60\u9700\u8981\u663e\u793a\u7528\u6237\u7684\u4e2a\u4eba\u8d44\u6599\uff0c\u4ee5\u53ca\u5176\u6700\u65b0\u8ba2\u5355\u548c\u4ea7\u54c1\u8be6\u60c5\u3002\u5728\u89c4\u8303\u5316\u7684\u5173\u7cfb\u6a21\u578b\u4e2d\uff0c\u8fd9\u53ef\u80fd\u9700\u8981\u8fde\u63a5\u56db\u4e2a\u8868\u3002\u5982\u679c\u8fd9\u4e9b\u8868\u5f88\u5927\uff0cCPU\u5c06\u82b1\u8d39\u5927\u91cf\u65f6\u95f4\u8fdb\u884c\u6392\u5e8f\u548c\u884c\u5339\u914d\u3002<\/p>\n

            \u53bb\u89c4\u8303\u5316<\/strong>\u662f\u4e00\u79cd\u7528\u6765\u5e94\u5bf9\u8fd9\u4e00\u95ee\u9898\u7684\u6280\u672f\u3002\u5b83\u901a\u8fc7\u590d\u5236\u6570\u636e\u6765\u51cf\u5c11\u5bf9JOIN\u7684\u9700\u6c42\u3002\u8fd9\u80fd\u63d0\u5347\u8bfb\u53d6\u901f\u5ea6\uff0c\u4f46\u4f1a\u4f7f\u5199\u5165\u64cd\u4f5c\u66f4\u590d\u6742\uff0c\u5e76\u589e\u52a0\u6570\u636e\u4e0d\u4e00\u81f4\u7684\u98ce\u9669\u3002\u4e00\u4e2a\u5b8c\u7f8e\u7684ERD\u5e76\u4e0d\u4f1a\u81ea\u52a8\u51b3\u5b9a\u5728\u4f55\u5904\u5212\u8fd9\u6761\u754c\u9650\uff0c\u8fd9\u662f\u4e00\u4e2a\u57fa\u4e8e\u8bfb\u5199\u6bd4\u4f8b\u7684\u6218\u7565\u6027\u51b3\u7b56\u3002<\/p>\n

            \ud83d\udd0d \u6df1\u5165\u5256\u6790\uff1a\u67e5\u8be2\u6267\u884c\u8ba1\u5212<\/h2>\n

            \u6570\u636e\u5e93\u5f15\u64ce\u5e76\u4e0d\u4f1a\u5b8c\u5168\u6309\u7167\u7f16\u5199\u7684\u65b9\u5f0f\u6267\u884c\u67e5\u8be2\u3002\u5b83\u4f1a\u5206\u6790\u8bf7\u6c42\u5e76\u751f\u6210\u4e00\u4e2a\u6267\u884c\u8ba1\u5212<\/strong>\u3002\u8be5\u8ba1\u5212\u51b3\u5b9a\u4e86\u64cd\u4f5c\u7684\u987a\u5e8f\u3001\u4f7f\u7528\u54ea\u4e9b\u7d22\u5f15\uff0c\u4ee5\u53ca\u662f\u5426\u6267\u884c\u626b\u63cf\u6216\u67e5\u627e\u64cd\u4f5c\u3002<\/p>\n

            ERD\u63d0\u4f9b\u4e86\u5173\u4e8e\u6570\u636e\u7c7b\u578b\u548c\u7ea6\u675f\u7684\u5143\u6570\u636e\u3002\u7136\u800c\uff0c\u4f18\u5316\u5668\u4f7f\u7528\u5173\u4e8e\u6570\u636e\u5206\u5e03\u7684\u7edf\u8ba1\u4fe1\u606f\u6765\u505a\u51fa\u51b3\u7b56\u3002\u5982\u679c\u7edf\u8ba1\u4fe1\u606f\u8fc7\u65f6\uff0c\u4f18\u5316\u5668\u53ef\u80fd\u4f1a\u9009\u62e9\u6b21\u4f18\u7684\u6267\u884c\u8ba1\u5212\uff0c\u800c\u5ffd\u7565\u53ef\u7528\u7684\u6700\u4f73\u7d22\u5f15\u3002<\/p>\n

            \u4f8b\u5982\uff0c\u5982\u679c\u4e00\u5f20\u8868\u67091000\u4e07\u884c\u6570\u636e\uff0c\u4f46\u7edf\u8ba1\u4fe1\u606f\u8ba4\u4e3a\u53ea\u6709100\u884c\uff0c\u4f18\u5316\u5668\u53ef\u80fd\u4f1a\u8ba4\u4e3a\u5168\u8868\u626b\u63cf\u6bd4\u7d22\u5f15\u67e5\u627e\u66f4\u4fbf\u5b9c\u3002\u8fd9\u4f1a\u5bfc\u81f4\u5373\u4f7fERD\u7ed3\u6784\u826f\u597d\uff0c\u6027\u80fd\u4f9d\u7136\u7f13\u6162\u3002<\/p>\n

            \ud83d\udee1\ufe0f \u6570\u636e\u5b8c\u6574\u6027\u4e0e\u901f\u5ea6\u4e4b\u95f4\u7684\u6743\u8861<\/h2>\n

            \u786e\u4fdd\u6570\u636e\u5b8c\u6574\u6027\u548c\u6700\u5927\u5316\u901f\u5ea6\u4e4b\u95f4\u5b58\u5728\u56fa\u6709\u7684\u77db\u76fe\u3002ERD\u901a\u8fc7\u7ea6\u675f\u548c\u89e6\u53d1\u5668\u7b49\u673a\u5236\u5f3a\u5236\u6267\u884c\u5b8c\u6574\u6027\u89c4\u5219\u3002<\/p>\n

              \n
            • \u5916\u952e\u7ea6\u675f\uff1a<\/strong> \u786e\u4fdd\u5f15\u7528\u5b8c\u6574\u6027\u3002\u5728\u5220\u9664\u6216\u66f4\u65b0\u65f6\uff0c\u7cfb\u7edf\u5fc5\u987b\u68c0\u67e5\u76f8\u5173\u8868\u3002\u8fd9\u4f1a\u589e\u52a0\u5199\u5165\u64cd\u4f5c\u7684\u5ef6\u8fdf\u3002<\/li>\n
            • \u89e6\u53d1\u5668\uff1a<\/strong> \u5728\u6570\u636e\u53d8\u66f4\u65f6\u81ea\u52a8\u8fd0\u884c\u7684\u811a\u672c\u3002\u867d\u7136\u5bf9\u903b\u8f91\u5904\u7406\u5f88\u6709\u7528\uff0c\u4f46\u4f1a\u4e3a\u6bcf\u6b21\u4e8b\u52a1\u589e\u52a0\u5904\u7406\u65f6\u95f4\u3002<\/li>\n
            • \u552f\u4e00\u6027\u7ea6\u675f\uff1a<\/strong> \u8981\u6c42\u7cfb\u7edf\u5728\u63d2\u5165\u65b0\u503c\u524d\u68c0\u67e5\u5df2\u6709\u503c\u3002<\/li>\n<\/ul>\n

              \u5728\u9ad8\u541e\u5410\u91cf\u7cfb\u7edf\u4e2d\uff0c\u8fd9\u4e9b\u68c0\u67e5\u6709\u65f6\u4f1a\u88ab\u7981\u7528\u6216\u5ef6\u8fdf\uff0c\u4ee5\u63d0\u5347\u901f\u5ea6\u3002\u4e00\u4e2a\u5b8c\u7f8e\u7684ERD\u5305\u542b\u6240\u6709\u8fd9\u4e9b\u89c4\u5219\uff0c\u4f46\u9ad8\u6027\u80fd\u7cfb\u7edf\u53ef\u80fd\u9700\u8981\u91c7\u7528\u4fee\u6539\u540e\u7684\u65b9\u6848\u3002<\/p>\n

              \ud83d\udea6 \u4f18\u5316\u7684\u5b9e\u7528\u6b65\u9aa4<\/h2>\n

              \u5982\u679c\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u8fd0\u884c\u7f13\u6162\uff0c\u4e0d\u8981\u7acb\u5373\u91cd\u65b0\u7ed8\u5236ERD\u3002\u5e94\u91c7\u7528\u7cfb\u7edf\u5316\u7684\u65b9\u6cd5\u6765\u8bc6\u522b\u74f6\u9888\u3002<\/p>\n

              1. \u5206\u6790\u6162\u67e5\u8be2<\/h3>\n

              \u542f\u7528\u67e5\u8be2\u65e5\u5fd7\u4ee5\u6355\u83b7\u8fd0\u884c\u65f6\u95f4\u8f83\u957f\u7684\u8bed\u53e5\u3002\u4f7f\u7528\u6027\u80fd\u5206\u6790\u5de5\u5177\u67e5\u770b\u65f6\u95f4\u6d88\u8017\u5728\u4f55\u5904\u3002\u662f\u7b49\u5f85\u9501\uff1f\u8fd8\u662f\u5728\u626b\u63cf\u884c\uff1f\u8fd8\u662f\u5728\u5904\u7406\u903b\u8f91\uff1f<\/p>\n

              2. \u5ba1\u67e5\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5<\/h3>\n

              \u68c0\u67e5\u54ea\u4e9b\u7d22\u5f15\u5b9e\u9645\u4e0a\u88ab\u4f7f\u7528\u4e86\u3002\u672a\u4f7f\u7528\u7684\u7d22\u5f15\u4f1a\u5360\u7528\u5b58\u50a8\u7a7a\u95f4\u5e76\u51cf\u6162\u5199\u5165\u901f\u5ea6\u3002\u4e3a\u9891\u7e41\u67e5\u8be2\u4e2d\u7684WHERE\u548cJOIN\u5b50\u53e5\u521b\u5efa\u5339\u914d\u7684\u7d22\u5f15\u3002<\/p>\n

              3. \u4f18\u5316\u786c\u4ef6\u8d44\u6e90\u914d\u7f6e<\/h3>\n

              \u786e\u4fdd\u6570\u636e\u5e93\u670d\u52a1\u5668\u6709\u8db3\u591f\u7684\u5185\u5b58\u6765\u7f13\u5b58\u5de5\u4f5c\u96c6\u3002\u5982\u679c\u6570\u636e\u5e93\u53d7\u5185\u5b58\u9650\u5236\uff0c\u589e\u52a0\u5185\u5b58\u5c06\u7acb\u5373\u89c1\u6548\u3002\u5982\u679c\u662fCPU\u53d7\u9650\uff0c\u5219\u53ef\u80fd\u9700\u8981\u5347\u7ea7\u5904\u7406\u5668\u6216\u4f18\u5316\u4ee3\u7801\u3002<\/p>\n

              4. \u5b9e\u65bd\u7f13\u5b58<\/h3>\n

              \u5e76\u975e\u6bcf\u4e2a\u8bf7\u6c42\u90fd\u9700\u8981\u8bbf\u95ee\u6570\u636e\u5e93\u3002\u5bf9\u4e8e\u9891\u7e41\u8bbf\u95ee\u7684\u6570\u636e\uff0c\u4f7f\u7528\u5185\u5b58\u7f13\u5b58\uff08\u5982Redis\u6216Memcached\uff09\u3002\u8fd9\u53ef\u4ee5\u5b8c\u5168\u7ed5\u8fc7\u6570\u636e\u5e93\uff0c\u5b9e\u73b0\u8bfb\u53d6\u64cd\u4f5c\u3002<\/p>\n

              5. \u76d1\u63a7\u5e76\u53d1\u6027<\/h3>\n

              \u6ce8\u610f\u9501\u7b49\u5f85\u3002\u5982\u679c\u7528\u6237\u9047\u5230\u8d85\u65f6\u95ee\u9898\uff0c\u8bf7\u68c0\u67e5\u4e8b\u52a1\u957f\u5ea6\u3002\u4fdd\u6301\u4e8b\u52a1\u7b80\u77ed\uff0c\u4ee5\u4fbf\u5feb\u901f\u91ca\u653e\u9501\u3002<\/p>\n

              \ud83d\udd04 \u6a21\u5f0f\u6f14\u8fdb\u7684\u4f5c\u7528<\/h2>\n

              \u5e94\u7528\u7a0b\u5e8f\u5728\u53d8\u5316\uff0c\u9700\u6c42\u5728\u8f6c\u79fb\u3002ERD \u5fc5\u987b\u968f\u7740\u4e1a\u52a1\u53d1\u5c55\u800c\u6f14\u8fdb\u3002\u516d\u4e2a\u6708\u524d\u5b8c\u7f8e\u7684\u6a21\u5f0f\uff0c\u53ef\u80fd\u56e0\u4e3a\u65b0\u589e\u529f\u80fd\u6216\u6570\u636e\u91cf\u589e\u52a0\u800c\u4eca\u5929\u5df2\u8fc7\u65f6\u3002<\/p>\n

              \u8fc1\u79fb\u7b56\u7565\u5f88\u91cd\u8981\u3002\u5c06\u6570\u636e\u4ece\u4e00\u4e2a\u5c0f\u8868\u79fb\u52a8\u5230\u4e00\u4e2a\u5927\u7684\u5206\u533a\u8868\u4e2d\uff0c\u53ef\u4ee5\u63d0\u5347\u6027\u80fd\u3002\u5c06\u6570\u636e\u7c7b\u578b\u4eceVARCHAR<\/code>\u6539\u4e3aINT<\/code>\u53ef\u4ee5\u51cf\u5c11\u5b58\u50a8\u7a7a\u95f4\u5e76\u63d0\u5347\u626b\u63cf\u901f\u5ea6\u3002\u8fd9\u4e9b\u51b3\u7b56\u901a\u5e38\u5728\u521d\u59cb ERD \u521b\u5efa\u4e4b\u540e\u624d\u505a\u51fa\u3002<\/p>\n

              \u9759\u6001\u7684 ERD \u65e0\u6cd5\u8003\u8651\u6570\u636e\u589e\u957f\u3002\u968f\u7740\u6570\u636e\u89c4\u6a21\u6269\u5927\uff0c\u6027\u80fd\u7279\u5f81\u4e5f\u4f1a\u53d1\u751f\u53d8\u5316\u3002\u4e00\u4e2a\u5728 1 \u4e07\u6761\u8bb0\u5f55\u4e0b\u6709\u6548\u7684\u8bbe\u8ba1\uff0c\u53ef\u80fd\u5728 1000 \u4e07\u6761\u8bb0\u5f55\u65f6\u5931\u6548\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u6027\u80fd\u8c03\u4f18\u662f\u4e00\u4e2a\u6301\u7eed\u7684\u8fc7\u7a0b\uff0c\u800c\u975e\u4e00\u6b21\u6027\u4efb\u52a1\u3002<\/p>\n

              \ud83e\udde9 NoSQL \u7684\u8003\u91cf<\/h2>\n

              ERD \u7684\u6982\u5ff5\u5728\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4e2d\u5e94\u7528\u6700\u4e3a\u4e25\u683c\u3002\u5728 NoSQL \u73af\u5883\u4e2d\uff0c\u6570\u636e\u6a21\u578b\u6709\u6240\u4e0d\u540c\u3002\u6587\u6863\u5b58\u50a8\u3001\u952e\u503c\u5b58\u50a8\u548c\u56fe\u6570\u636e\u5e93\u5bf9\u5173\u7cfb\u7684\u5904\u7406\u65b9\u5f0f\u4e5f\u5404\u4e0d\u76f8\u540c\u3002<\/p>\n

              \u5728\u6587\u6863\u5b58\u50a8\u4e2d\uff0c\u6570\u636e\u53ef\u80fd\u88ab\u5d4c\u5165\u4ee5\u907f\u514d\u8fde\u63a5\u64cd\u4f5c\u3002\u8fd9\u901a\u8fc7\u8bbe\u8ba1\u5b9e\u73b0\u4e86\u53bb\u89c4\u8303\u5316\u3002\u5728\u56fe\u6570\u636e\u5e93\u4e2d\uff0c\u5173\u7cfb\u662f\u7b2c\u4e00\u7c7b\u5bf9\u8c61\uff0c\u88ab\u663e\u5f0f\u5b58\u50a8\u4ee5\u4f18\u5316\u904d\u5386\u3002<\/p>\n

              ERD \u4fdd\u8bc1\u6027\u80fd\u7684\u795e\u8bdd\u5728\u8fd9\u91cc\u66f4\u52a0\u660e\u663e\u3002\u5728 NoSQL \u4e2d\uff0c\u6a21\u5f0f\u901a\u5e38\u5177\u6709\u7075\u6d3b\u6027\u6216\u52a8\u6001\u6027\u3002\u6027\u80fd\u5f88\u5927\u7a0b\u5ea6\u4e0a\u53d6\u51b3\u4e8e\u5e94\u7528\u7a0b\u5e8f\u4ee3\u7801\u4e2d\u5b9a\u4e49\u7684\u8bbf\u95ee\u6a21\u5f0f\uff0c\u800c\u975e\u50f5\u5316\u7684\u56fe\u8868\u3002<\/p>\n

              \ud83c\udfc1 \u6570\u636e\u67b6\u6784\u7684\u6700\u7ec8\u601d\u8003<\/h2>\n

              \u6784\u5efa\u4e00\u4e2a\u5feb\u901f\u7684\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u6574\u4f53\u89c6\u89d2\u3002ERD \u662f\u4e00\u4e2a\u5173\u952e\u7684\u8d77\u70b9\uff0c\u786e\u4fdd\u6570\u636e\u903b\u8f91\u4e0a\u6709\u5e8f\u3002\u5b83\u80fd\u9632\u6b62\u6df7\u4e71\u5e76\u7ef4\u6301\u5b8c\u6574\u6027\u3002\u7136\u800c\uff0c\u5b83\u5e76\u4e0d\u662f\u9a71\u52a8\u901f\u5ea6\u7684\u5f15\u64ce\u3002<\/p>\n

              \u6027\u80fd\u662f\u4ee5\u4e0b\u56e0\u7d20\u534f\u540c\u4f5c\u7528\u7684\u7ed3\u679c\uff1a<\/p>\n

                \n
              • \u4e00\u4e2a\u624e\u5b9e\u7684\u903b\u8f91\u6a21\u578b\u3002<\/li>\n
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