{"id":1731,"date":"2026-04-10T04:07:26","date_gmt":"2026-04-10T04:07:26","guid":{"rendered":"https:\/\/www.viz-note.com\/tw\/challenging-erd-scenarios-principal-dbas\/"},"modified":"2026-04-10T04:07:26","modified_gmt":"2026-04-10T04:07:26","slug":"challenging-erd-scenarios-principal-dbas","status":"publish","type":"post","link":"https:\/\/www.viz-note.com\/tw\/challenging-erd-scenarios-principal-dbas\/","title":{"rendered":"\u8207\u8cc7\u6df1\u8cc7\u6599\u5eab\u7ba1\u7406\u54e1\u7684\u554f\u7b54\uff1a\u6211\u5011\u66fe\u9762\u5c0d\u904e\u6700\u5177\u6311\u6230\u6027\u7684\u5be6\u9ad4\u95dc\u4fc2\u5716\u60c5\u5883"},"content":{"rendered":"

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\n
\"Marker-style<\/figure>\n<\/div>\n

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    \n
  • \u554f\u984c\uff1a<\/strong> \u901a\u5e38\uff0c\u5718\u968a\u6703\u8a66\u5716\u5c07\u8a3b\u518a\u8cc7\u6599\uff08\u5982\u6210\u7e3e\u6216\u8a3b\u518a\u65e5\u671f\uff09\u5132\u5b58\u5728\u4e3b\u8981\u7684\u5b78\u751f\u6216\u8ab2\u7a0b\u8868\u683c\u4e2d\uff0c\u5c0e\u81f4\u6975\u5927\u7684\u8cc7\u6599\u91cd\u8907\u6216\u51fa\u73fe\u5927\u91cf\u7a7a\u503c\u3002<\/li>\n
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    \u591a\u5c0d\u591a\u95dc\u4fc2\u7684\u95dc\u9375\u8003\u91cf\uff1a<\/strong><\/p>\n

      \n
    • \u95dc\u4fc2\u662f\u5426\u5177\u6709\u9700\u8981\u7d22\u5f15\u7684\u5c6c\u6027\uff1f<\/li>\n
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      \u6548\u80fd\u554f\u984c\uff1a<\/strong><\/p>\n

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      \u5b8c\u6574\u6027\u554f\u984c\uff1a<\/strong><\/p>\n

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        \n
      • \u6df1\u5ea6\u9650\u5236\uff1a<\/strong> \u591a\u6578\u7cfb\u7d71\u6703\u9650\u5236\u5c64\u7d1a\u6df1\u5ea6\uff08\u4f8b\u5982 32 \u5c64\uff09\uff0c\u4ee5\u9632\u6b62\u904d\u6b77\u6642\u767c\u751f\u5806\u758a\u6ea2\u4f4d\u932f\u8aa4\u3002<\/li>\n
      • \u8def\u5f91\u805a\u5408\uff1a<\/strong> \u8a08\u7b97\u5b50\u6a39\u7684\u7e3d\u6210\u672c\u6216\u6578\u91cf\u9700\u8981\u905e\u8ff4\u908f\u8f2f\uff0c\u9019\u5728\u6a19\u6e96\u67e5\u8a62\u8a08\u756b\u4e2d\u96e3\u4ee5\u512a\u5316\u3002<\/li>\n<\/ul>\n

        3. \u8d85\u578b\u8207\u5b50\u578b\u5efa\u6a21\uff1a\u7e7c\u627f\u7684\u5169\u96e3 \ud83e\uddec<\/h2>\n

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        \u9078\u9805 A\uff1a\u55ae\u4e00\u8868\u683c\u7e7c\u627f<\/strong><\/p>\n

        \u6240\u6709\u5b50\u985e\u578b\u7684\u6240\u6709\u5c6c\u6027\u90fd\u4f4d\u65bc\u4e00\u500b\u8868\u683c\u4e2d\u3002\u672a\u4f7f\u7528\u7684\u5c6c\u6027\u4f7f\u7528\u7a7a\u503c\u3002<\/p>\n

          \n
        • \u512a\u9ede\uff1a<\/em>\u67e5\u8a62\u7c21\u55ae\uff0c\u67e5\u627e\u4efb\u4f55\u8eca\u8f1b\u90fd\u4e0d\u9700\u8981\u9023\u63a5\u3002<\/li>\n
        • \u7f3a\u9ede\uff1a<\/em>\u8868\u683c\u81a8\u8139\uff0c\u96e3\u4ee5\u5f37\u5236\u57f7\u884c\u5b50\u985e\u578b\u7279\u5b9a\u7684\u7d04\u675f\uff0c\u8a31\u591a\u53ef\u70ba\u7a7a\u7684\u6b04\u4f4d\u3002<\/li>\n<\/ul>\n

          \u9078\u9805 B\uff1a\u985e\u5225\u8868\u683c\u7e7c\u627f<\/strong><\/p>\n

          \u8d85\u985e\u578b\uff08Vehicle\uff09\u4f7f\u7528\u4e00\u500b\u8868\u683c\uff0c\u5b50\u985e\u578b\uff08Car\u3001Truck\uff09\u5247\u4f7f\u7528\u7368\u7acb\u7684\u8868\u683c\uff0c\u4e26\u900f\u904e\u4e3b\u9375\u9023\u7d50\u3002<\/p>\n

            \n
          • \u512a\u9ede\uff1a<\/em>\u6e05\u6670\u7684\u5206\u96e2\uff0c\u7121\u7a7a\u503c\uff0c\u6bcf\u500b\u5b50\u985e\u578b\u90fd\u6709\u56b4\u683c\u7684\u7d04\u675f\u3002<\/li>\n
          • \u7f3a\u9ede\uff1a<\/em>\u67e5\u8a62\u9700\u8981\u9023\u63a5\u591a\u500b\u8868\u683c\uff0c\u53ef\u80fd\u5f71\u97ff\u8b80\u53d6\u6548\u80fd\u3002<\/li>\n<\/ul>\n

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            4. \u6642\u9593\u8cc7\u6599\uff1a\u8ffd\u8e64\u96a8\u6642\u9593\u7684\u8b8a\u66f4 \u23f3<\/h2>\n

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            \u8907\u96dc\u6027\uff1a<\/strong><\/p>\n

            \u4e0d\u662f\u66f4\u65b0\u8cc7\u6599\u5217\uff0c\u800c\u662f\u63d2\u5165\u4e00\u7b46\u65b0\u7684\u8cc7\u6599\u5217\uff0c\u4e26\u5305\u542b\u6709\u6548\u7684\u8d77\u59cb\u8207\u7d50\u675f\u65e5\u671f\u3002\u820a\u8cc7\u6599\u5217\u6a19\u8a18\u70ba\u7121\u6548\u3002\u9019\u4f7f\u5f97\u6b77\u53f2\u8cc7\u6599\u7684\u5132\u5b58\u9700\u6c42\u52a0\u500d\uff0c\u4e26\u4f7f\u300c\u76ee\u524d\u8996\u5716\u300d\u7684\u67e5\u8a62\u8b8a\u5f97\u8907\u96dc\u3002<\/p>\n

            \u67e5\u8a62\u6311\u6230\uff1a<\/strong><\/p>\n

            \u9078\u64c7\u300c\u67d0\u7279\u5b9a\u6642\u9593\u9ede\u300d\u7684\u8cc7\u6599\u9700\u8981\u6839\u64da\u65e5\u671f\u7bc4\u570d\u9032\u884c\u904e\u6ffe\u3002\u5982\u679c\u907a\u6f0f\u4e86\u65e5\u671f\u7bc4\u570d\u908f\u8f2f\uff0c\u53ef\u80fd\u6703\u8fd4\u56de\u8a18\u9304\u7684\u932f\u8aa4\u7248\u672c\u3002\u9019\u901a\u5e38\u662f\u91d1\u878d\u61c9\u7528\u4e2d\u8cc7\u6599\u5b8c\u6574\u6027\u554f\u984c\u6d6e\u73fe\u7684\u5730\u65b9\u3002<\/p>\n

              \n
            • \u5feb\u7167\u8a2d\u8a08\uff1a<\/strong>\u5132\u5b58\u67d0\u6642\u9593\u9ede\u7684\u72c0\u614b\u3002\u9700\u8981\u5b9a\u671f\u57f7\u884c\u6279\u6b21\u4f5c\u696d\u4f86\u5beb\u5165\u5feb\u7167\u3002<\/li>\n
            • \u4ea4\u6613\u65e5\u8a8c\u8a2d\u8a08\uff1a<\/strong>\u8a18\u9304\u6bcf\u4e00\u9805\u8b8a\u66f4\u3002\u5beb\u5165\u91cf\u9ad8\uff0c\u6aa2\u7d22\u908f\u8f2f\u8907\u96dc\u3002<\/li>\n
            • \u5b9a\u671f\u8a2d\u8a08\uff1a<\/strong>\u5132\u5b58\u6709\u6548\u671f\u9593\u3002\u80fd\u826f\u597d\u8655\u7406\u6642\u9593\u4e0a\u7684\u9593\u9699\uff0c\u4f46\u9700\u8981\u4ed4\u7d30\u7ba1\u7406\u908a\u754c\u3002<\/li>\n<\/ul>\n

              5. \u5206\u6563\u5f0f\u7cfb\u7d71\uff1a\u5206\u7247\u8207\u95dc\u4fc2 \ud83d\udd17<\/h2>\n

              \u7576\u55ae\u4e00\u8cc7\u6599\u5eab\u7121\u6cd5\u5bb9\u7d0d\u8cc7\u6599\u6642\uff0c\u5206\u7247\u8b8a\u5f97\u5fc5\u8981\u3002\u9019\u6b63\u662f ERD \u8a2d\u8a08\u9762\u81e8\u6700\u56b4\u82db\u7269\u7406\u9650\u5236\u7684\u5730\u65b9\u3002\u8de8\u8d8a\u5206\u7247\u908a\u754c\u7684\u95dc\u4fc2\u4ee3\u50f9\u9ad8\u6602\u3002<\/p>\n

              \u9023\u63a5\u554f\u984c\uff1a<\/strong><\/p>\n

              \u5982\u679c\u8868\u683c A \u6309\u4f7f\u7528\u8005 ID \u5206\u7247\uff0c\u4e14\u8868\u683c B \u8207\u8868\u683c A \u76f8\u95dc\u806f\uff0c\u5247\u8868\u683c B \u4e5f\u5fc5\u9808\u6309\u76f8\u540c\u7684\u4f7f\u7528\u8005 ID \u5206\u7247\uff0c\u4ee5\u907f\u514d\u5206\u6563\u5f0f\u9023\u63a5\u3002\u5982\u679c\u8868\u683c B \u6309\u5176\u4ed6\u65b9\u5f0f\u5206\u7247\uff0c\u5247\u5fc5\u9808\u5c07\u67e5\u8a62\u8def\u7531\u81f3\u591a\u500b\u5206\u7247\uff0c\u805a\u5408\u7d50\u679c\uff0c\u4e26\u5728\u672c\u5730\u9032\u884c\u9023\u63a5\u3002<\/p>\n

              \u53c3\u8003\u5b8c\u6574\u6027\uff1a<\/strong><\/p>\n

              \u5916\u9375\u7d04\u675f\u5728\u8de8\u5206\u6563\u5f0f\u7bc0\u9ede\u6642\u5f88\u96e3\u5f37\u5236\u57f7\u884c\u3002\u8a31\u591a\u7cfb\u7d71\u5728\u5206\u7247\u74b0\u5883\u4e2d\u7981\u7528\u5916\u9375\u4ee5\u7dad\u6301\u53ef\u7528\u6027\u3002\u9019\u5c07\u5b8c\u6574\u6027\u8cac\u4efb\u8f49\u79fb\u5230\u61c9\u7528\u7a0b\u5f0f\u5c64\uff0c\u800c\u61c9\u7528\u7a0b\u5f0f\u5c64\u5bb9\u6613\u51fa\u73fe\u7af6\u722d\u689d\u4ef6\u3002<\/p>\n

              \u5206\u6563\u5f0fERD\u7684\u91cd\u9ede\u8981\u9ede\uff1a<\/strong><\/p>\n

                \n
              • \u907f\u514d\u8de8\u8d8a\u591a\u500b\u5206\u7247\u7684\u591a\u5c0d\u591a\u95dc\u4fc2\u3002<\/li>\n
              • \u53cd\u898f\u7bc4\u5316\u8cc7\u6599\uff0c\u4ee5\u6e1b\u5c11\u8de8\u7bc0\u9ede\u9023\u63a5\u7684\u9700\u6c42\u3002<\/li>\n
              • \u6839\u64da\u6700\u5e38\u898b\u7684\u67e5\u8a62\u6a21\u5f0f\u4f86\u8a2d\u8a08\u5206\u5340\u91d1\u9470\uff08\u5206\u7247\u91d1\u9470\uff09\uff0c\u800c\u4e0d\u50c5\u50c5\u662f\u4e3b\u9375\u3002<\/li>\n<\/ul>\n

                6. \u6027\u80fd\u8207\u898f\u7bc4\u5316\u4e4b\u9593\u7684\u6b0a\u8861\uff1a\u5e73\u8861\u9ede \u2696\ufe0f<\/h2>\n

                \u898f\u7bc4\u5316\uff081NF\u30012NF\u30013NF\uff09\u88ab\u8996\u70ba\u8cc7\u6599\u5b8c\u6574\u6027\u7684\u9ec3\u91d1\u6a19\u6e96\u3002\u7136\u800c\uff0c\u5728\u9ad8\u541e\u5410\u91cf\u7cfb\u7d71\u4e2d\uff0c\u56b4\u683c\u7684\u898f\u7bc4\u5316\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002ERD\u5fc5\u9808\u5728\u5169\u8005\u4e4b\u9593\u53d6\u5f97\u5e73\u8861\u3002<\/p>\n

                \u4f55\u6642\u9032\u884c\u53cd\u898f\u7bc4\u5316\uff1a<\/strong><\/p>\n

                  \n
                • \u8b80\u64cd\u4f5c\u5bc6\u96c6\u7684\u5de5\u4f5c\u8ca0\u8f09\uff1a<\/strong> \u5982\u679c\u8b80\u53d6\u8cc7\u6599\u7684\u6b21\u6578\u9060\u9ad8\u65bc\u5beb\u5165\u6b21\u6578\uff0c\u589e\u52a0\u5197\u9918\u6b04\u4f4d\u53ef\u4ee5\u7bc0\u7701\u9023\u63a5\u64cd\u4f5c\u3002<\/li>\n
                • \u5831\u8868\u9700\u6c42\uff1a<\/strong> \u5728\u898f\u7bc4\u5316\u8cc7\u6599\u4e0a\u9032\u884c\u805a\u5408\u9700\u8981\u8907\u96dc\u7684\u9023\u63a5\u64cd\u4f5c\uff0c\u9019\u6703\u5c0e\u81f4\u5100\u8868\u677f\u904b\u884c\u8b8a\u6162\u3002<\/li>\n
                • \u5beb\u64cd\u4f5c\u5bc6\u96c6\u7684\u5de5\u4f5c\u8ca0\u8f09\uff1a<\/strong> \u6709\u6642\uff0c\u5c07\u8cc7\u6599\u5206\u958b\u5132\u5b58\u53ef\u4ee5\u6e1b\u5c11\u66f4\u65b0\u6642\u7684\u9396\u7af6\u722d\u3002<\/li>\n<\/ul>\n

                  \u6211\u5011\u7684\u5c08\u5bb6\u5c0f\u7d44\u5f37\u8abf\uff0c\u4e26\u4e0d\u5b58\u5728\u300c\u5b8c\u7f8e\u300d\u7684\u8cc7\u6599\u7d50\u69cb\u3002\u9019\u662f\u4e00\u7a2e\u59a5\u5354\u3002ERD \u61c9\u7576\u8a18\u9304\u53cd\u898f\u7bc4\u5316\u767c\u751f\u7684\u4f4d\u7f6e\u53ca\u5176\u539f\u56e0\uff0c\u4ee5\u4fbf\u672a\u4f86\u7684\u7dad\u8b77\u4eba\u54e1\u7406\u89e3\uff0c\u5197\u9918\u662f\u523b\u610f\u8a2d\u8a08\u7684\uff0c\u800c\u975e\u932f\u8aa4\u3002<\/p>\n

                  \u6a21\u578b\u8a2d\u8a08\u6a21\u5f0f\u7684\u6bd4\u8f03 \ud83d\udcca<\/h2>\n

                  \u70ba\u5354\u52a9\u6c7a\u7b56\uff0c\u4ee5\u4e0b\u662f\u8a0e\u8ad6\u904e\u7684\u6a21\u578b\u8a2d\u8a08\u6a21\u5f0f\u53ca\u5176\u5178\u578b\u4f7f\u7528\u60c5\u5883\u7684\u7e3d\u7d50\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n
                  \u6a21\u5f0f<\/th>\n\u6700\u4f73\u4f7f\u7528\u60c5\u5883<\/th>\n\u4e3b\u8981\u98a8\u96aa<\/th>\n\u8907\u96dc\u5ea6<\/th>\n<\/tr>\n<\/thead>\n
                  \u55ae\u4e00\u8868\u683c<\/td>\n\u7c21\u55ae\u7684\u5c64\u6b21\u7d50\u69cb\uff0c\u7a2e\u985e\u5c11<\/td>\n\u7a7a\u6b04\u4f4d\u3001\u7d50\u69cb\u81a8\u8139<\/td>\n\u4f4e<\/td>\n<\/tr>\n
                  \u985e\u5225\u8868\u683c<\/td>\n\u56b4\u683c\u7684\u5b50\u985e\u578b\uff0c\u660e\u78ba\u7684\u5c6c\u6027<\/td>\n\u9023\u63a5\u958b\u92b7<\/td>\n\u4e2d\u7b49<\/td>\n<\/tr>\n
                  \u905e\u8ff4<\/td>\n\u7d44\u7e54\u5716\u3001\u5206\u985e<\/td>\n\u904d\u6b77\u6df1\u5ea6\u3001\u5faa\u74b0<\/td>\n\u9ad8<\/td>\n<\/tr>\n
                  \u95dc\u806f\u5be6\u9ad4<\/td>\n\u5177\u6709\u5c6c\u6027\u7684\u591a\u5c0d\u591a<\/td>\n\u9023\u63a5\u6548\u80fd<\/td>\n\u4e2d\u7b49<\/td>\n<\/tr>\n
                  \u6642\u9593\u6027<\/td>\n\u5be9\u8a08\u3001\u6b77\u53f2\u8ffd\u8e64<\/td>\n\u67e5\u8a62\u8907\u96dc\u5ea6<\/td>\n\u9ad8<\/td>\n<\/tr>\n
                  \u5206\u6563\u5f0f\u5206\u7247<\/td>\n\u5de8\u5927\u898f\u6a21\u3001\u6c34\u5e73\u64f4\u5c55<\/td>\n\u53c3\u8003\u5b8c\u6574\u6027<\/td>\n\u975e\u5e38\u9ad8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                  ERD\u5be9\u67e5\u6e05\u55ae \u2705<\/h2>\n

                  \u5728\u6700\u7d42\u78ba\u5b9a\u5be6\u9ad4\u95dc\u4fc2\u5716\u4e4b\u524d\uff0c\u8acb\u4f7f\u7528\u6b64\u6e05\u55ae\u4f86\u767c\u73fe\u5e38\u898b\u7684\u9677\u9631\u3002\u5728\u8a2d\u8a08\u968e\u6bb5\u767c\u73fe\u9019\u4e9b\u554f\u984c\uff0c\u7e3d\u6bd4\u5728\u751f\u7522\u74b0\u5883\u4e2d\u767c\u73fe\u8981\u597d\u3002<\/p>\n

                    \n
                  • \u57fa\u6578\uff1a<\/strong>\u60a8\u662f\u5426\u660e\u78ba\u5b9a\u7fa9\u4e86\u4e00\u5c0d\u4e00\u3001\u4e00\u5c0d\u591a\u548c\u591a\u5c0d\u591a\u7684\u95dc\u4fc2\uff1f\u6700\u5c0f\/\u6700\u5927\u7d04\u675f\uff080..1, 1..*\uff09\u662f\u5426\u660e\u78ba\uff1f<\/li>\n
                  • \u8cc7\u6599\u985e\u578b\uff1a<\/strong>\u6b04\u4f4d\u985e\u578b\u662f\u5426\u9069\u5408\u9810\u671f\u7684\u8cc7\u6599\u5927\u5c0f\uff1f\uff08\u4f8b\u5982\uff0cID \u4f7f\u7528 Integer \u9084\u662f Varchar\uff09\u3002<\/li>\n
                  • \u53ef\u7a7a\u6027\uff1a<\/strong>\u5916\u9375\u662f\u5426\u53ef\u70ba\u7a7a\uff1f\u5982\u679c\u662f\uff0c\u908f\u8f2f\u662f\u5426\u80fd\u59a5\u5584\u8655\u7406\u5b64\u7acb\u7684\u53c3\u8003\uff1f<\/li>\n
                  • \u7d22\u5f15\u7b56\u7565\uff1a<\/strong>ERD \u662f\u5426\u6a19\u793a\u51fa\u54ea\u4e9b\u6b04\u4f4d\u9700\u8981\u7d22\u5f15\u4ee5\u63d0\u5347\u6548\u80fd\uff1f\u5916\u9375\u901a\u5e38\u6703\u88ab\u7d22\u5f15\u4ee5\u52a0\u5feb\u9023\u63a5\u901f\u5ea6\u3002<\/li>\n
                  • \u547d\u540d\u6163\u4f8b\uff1a<\/strong>\u8cc7\u6599\u8868\u548c\u6b04\u4f4d\u540d\u7a31\u662f\u5426\u4e00\u81f4\uff1f\u907f\u514d\u4f7f\u7528\u65e5\u5f8c\u53ef\u80fd\u7522\u751f\u6b67\u7fa9\u7684\u7e2e\u5beb\u3002<\/li>\n
                  • \u696d\u52d9\u898f\u5247\uff1a<\/strong>\u7d04\u675f\u689d\u4ef6\uff08\u4f8b\u5982\u300c\u4f7f\u7528\u8005\u4e0d\u80fd\u64c1\u6709\u5169\u500b\u6d3b\u8e8d\u7684\u8a02\u95b1\u300d\uff09\u662f\u5426\u4ee5\u908f\u8f2f\u6aa2\u67e5\u6216\u8cc7\u6599\u5eab\u7d04\u675f\u7684\u65b9\u5f0f\u5448\u73fe\uff1f<\/li>\n
                  • \u53ef\u64f4\u5c55\u6027\uff1a<\/strong> \u6a21\u5f0f\u80fd\u5426\u5728\u4e0d\u9700\u5b8c\u6574\u9077\u79fb\u7684\u60c5\u6cc1\u4e0b\u652f\u63f4\u65b0\u589e\u5c6c\u6027\uff1f\uff08\u4f8b\u5982\uff0c\u5728\u9069\u7576\u60c5\u6cc1\u4e0b\u4f7f\u7528EAV\u6a21\u5f0f\u6216JSON\u6b04\u4f4d\uff09\u3002<\/li>\n<\/ul>\n

                    \u8cc7\u6599\u6a21\u578b\u8a2d\u8a08\u7684\u6700\u5f8c\u60f3\u6cd5 \ud83e\udde0<\/h2>\n

                    \u8a2d\u8a08\u5be6\u9ad4\u95dc\u4fc2\u5716\u4e0d\u50c5\u50c5\u662f\u756b\u65b9\u6846\u548c\u7dda\u689d\u3002\u5b83\u5728\u65bc\u7406\u89e3\u8cc7\u6599\u7684\u6d41\u52d5\u3001\u786c\u9ad4\u7684\u9650\u5236\u4ee5\u53ca\u696d\u52d9\u7684\u9700\u6c42\u3002\u9019\u88e1\u8a0e\u8ad6\u7684\u60c5\u5883\u4ee3\u8868\u4e86\u7406\u8ad6\u8207\u5be6\u8e10\u76f8\u9047\u6642\u7684\u6469\u64e6\u9ede\u3002<\/p>\n

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