{"id":1660,"date":"2026-04-07T22:58:20","date_gmt":"2026-04-07T22:58:20","guid":{"rendered":"https:\/\/www.viz-note.com\/tw\/common-erd-mistakes-data-integrity-violations\/"},"modified":"2026-04-07T22:58:20","modified_gmt":"2026-04-07T22:58:20","slug":"common-erd-mistakes-data-integrity-violations","status":"publish","type":"post","link":"https:\/\/www.viz-note.com\/tw\/common-erd-mistakes-data-integrity-violations\/","title":{"rendered":"\u5c0e\u81f4\u8cc7\u6599\u5b8c\u6574\u6027\u9055\u898f\u7684\u5be6\u9ad4\u95dc\u4fc2\u5716\u5efa\u6a21\u5e38\u898b\u932f\u8aa4"},"content":{"rendered":"<p>\u8a2d\u8a08\u7a69\u5065\u7684\u8cc7\u6599\u5eab\u7d50\u69cb\uff0c\u59cb\u65bc\u7cbe\u78ba\u7684\u898f\u5283\u3002\u5be6\u9ad4\u95dc\u4fc2\u5716\uff08ERD\uff09\u4f5c\u70ba\u8cc7\u6599\u5132\u5b58\u3001\u95dc\u806f\u8207\u5b58\u53d6\u65b9\u5f0f\u7684\u85cd\u5716\u3002\u7136\u800c\uff0c\u5373\u4f7f\u7d93\u9a57\u8c50\u5bcc\u7684\u67b6\u69cb\u5e2b\u5728\u5efa\u6a21\u968e\u6bb5\u4e5f\u53ef\u80fd\u5f15\u5165\u7d30\u5fae\u7684\u932f\u8aa4\u3002\u9019\u4e9b\u932f\u8aa4\u901a\u5e38\u5728\u5f8c\u7e8c\u968e\u6bb5\u8868\u73fe\u70ba\u95dc\u9375\u7684\u8cc7\u6599\u5b8c\u6574\u6027\u9055\u898f\u3002\u7576\u8cc7\u6599\u5b8c\u6574\u6027\u5931\u6548\u6642\uff0c\u6574\u500b\u61c9\u7528\u7a0b\u5f0f\u7684\u53ef\u9760\u6027\u5c07\u53d7\u5230\u5a01\u8105\u3002 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Relationship Diagram modeling mistakes that cause data integrity violations, including ambiguous cardinality, missing foreign keys, poor normalization, incorrect data types, circular references, weak primary keys, and inconsistent naming conventions, with solutions and best practices for robust database design\" decoding=\"async\" src=\"https:\/\/www.viz-note.com\/wp-content\/uploads\/2026\/04\/erd-modeling-mistakes-data-integrity-infographic-line-art.jpg\"\/><\/figure>\n<\/div>\n<h2>\u7406\u89e3\u8cc7\u6599\u5eab\u8a2d\u8a08\u4e2d\u7684\u8cc7\u6599\u5b8c\u6574\u6027 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NULL\uff08SET NULL\uff09\uff1a<\/strong>\u5982\u679c\u7236\u8cc7\u6599\u5217\u88ab\u522a\u9664\uff0c\u5247\u5c07\u5b50\u8cc7\u6599\u5217\u4e2d\u7684\u5916\u9375\u8a2d\u70ba NULL\u3002<\/li>\n<li><strong>\u9650\u5236\uff08RESTRICT\uff09\uff1a<\/strong>\u5982\u679c\u5b58\u5728\u5b50\u8cc7\u6599\u5217\uff0c\u5247\u963b\u6b62\u7236\u8cc7\u6599\u5217\u7684\u522a\u9664\u3002<\/li>\n<\/ul>\n<p>\u9078\u64c7\u6b63\u78ba\u7684\u52d5\u4f5c\u53d6\u6c7a\u65bc\u696d\u52d9\u908f\u8f2f\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5b58\u5728\u6d3b\u8e8d\u7684\u8a02\u55ae\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u9650\u5236\u5c0d\u4f9b\u61c9\u5546\u7684\u522a\u9664\uff0c\u4f46\u5c0d\u65bc\u5df2\u6b78\u6a94\u7684\u9805\u76ee\u5247\u5141\u8a31\u522a\u9664\u3002\ud83d\udee1\ufe0f<em>\u4f9b\u61c9\u5546<\/em>\u5982\u679c\u5b58\u5728\u6d3b\u8e8d\u7684\u8a02\u55ae\uff0c\u4f46\u5141\u8a31\u5c0d\u5df2\u6b78\u6a94\u9805\u76ee\u9032\u884c\u522a\u9664\u3002\ud83d\udee1\ufe0f<\/p>\n<h2>\u932f\u8aa4 3\uff1a\u4e0d\u826f\u7684\u898f\u7bc4\u5316\u505a\u6cd5 \ud83d\udcc9<\/h2>\n<p>\u6a19\u6e96\u5316\u662f\u7d44\u7e54\u8cc7\u6599\u4ee5\u6e1b\u5c11\u5197\u9918\u4e26\u63d0\u5347\u5b8c\u6574\u6027\u7684\u4e00\u500b\u904e\u7a0b\u3002\u5b83\u6d89\u53ca\u5c07\u5927\u578b\u8868\u683c\u62c6\u5206\u70ba\u8f03\u5c0f\u4e14\u908f\u8f2f\u4e0a\u76f8\u95dc\u7684\u8868\u683c\u3002\u8df3\u904e\u6b64\u6b65\u9a5f\u6216\u932f\u8aa4\u5730\u61c9\u7528\uff0c\u662f\u8cc7\u6599\u640d\u58de\u7684\u4e3b\u8981\u4f86\u6e90\u3002<\/p>\n<h3>\u554f\u984c<\/h3>\n<p>\u6a21\u578b\u8a2d\u8a08\u8005\u7d93\u5e38\u5efa\u7acb\u55ae\u4e00\u7684\u300c\u5e73\u9762\u300d\u8868\u683c\u4f86\u5132\u5b58\u6240\u6709\u8cc7\u6599\u3002\u4f8b\u5982\uff0c\u5c07\u5ba2\u6236\u7d30\u7bc0\u653e\u5728\u8a02\u55ae\u8868\u683c\u4e2d\u3002\u96d6\u7136\u9019\u7c21\u5316\u4e86\u521d\u59cb\u67e5\u8a62\uff0c\u4f46\u9055\u53cd\u4e86\u6a19\u6e96\u5316\u7684\u539f\u5247\uff0c\u7279\u5225\u662f\u9055\u53cd\u4e86\u7b2c\u4e09\u7bc4\u5f0f\uff083NF\uff09\u3002\u5982\u679c\u5b58\u5728\u90e8\u5206\u4f9d\u8cf4\uff0c\u9084\u53ef\u80fd\u9055\u53cd\u7b2c\u4e8c\u7bc4\u5f0f\uff082NF\uff09\u3002<\/p>\n<h3>\u5f8c\u679c<\/h3>\n<ul>\n<li><strong>\u63d2\u5165\u7570\u5e38\uff1a<\/strong> \u6c92\u6709\u73fe\u6709\u7684\u8a02\u55ae\uff0c\u5c31\u7121\u6cd5\u65b0\u589e\u5ba2\u6236\u3002<\/li>\n<li><strong>\u522a\u9664\u7570\u5e38\uff1a<\/strong> \u522a\u9664\u8a02\u55ae\u53ef\u80fd\u6703\u610f\u5916\u5730\u79fb\u9664\u5ba2\u6236\u7684\u552f\u4e00\u8a18\u9304\u3002<\/li>\n<li><strong>\u66f4\u65b0\u7570\u5e38\uff1a<\/strong> \u5982\u679c\u5ba2\u6236\u66f4\u6539\u96fb\u8a71\u865f\u78bc\uff0c\u60a8\u5fc5\u9808\u66f4\u65b0\u8207\u5176\u76f8\u95dc\u7684\u6bcf\u4e00\u7b46\u8a02\u55ae\u8a18\u9304\u3002<\/li>\n<\/ul>\n<h3>\u89e3\u6c7a\u65b9\u6848<\/h3>\n<p>\u5728\u8a2d\u8a08\u968e\u6bb5\u9075\u5b88\u6a19\u6e96\u7684\u6a19\u6e96\u5316\u898f\u5247\uff1a<\/p>\n<ol>\n<li><strong>\u7b2c\u4e00\u7bc4\u5f0f\uff081NF\uff09\uff1a<\/strong> \u78ba\u4fdd\u503c\u70ba\u539f\u5b50\u6027\u3002\u55ae\u5143\u683c\u4e2d\u4e0d\u5f97\u6709\u91cd\u8907\u7684\u7fa4\u7d44\u6216\u6e05\u55ae\u3002<\/li>\n<li><strong>\u7b2c\u4e8c\u7bc4\u5f0f\uff082NF\uff09\uff1a<\/strong> \u79fb\u9664\u90e8\u5206\u4f9d\u8cf4\u3002\u6240\u6709\u975e\u9375\u5c6c\u6027\u5fc5\u9808\u4f9d\u8cf4\u65bc\u6574\u500b\u4e3b\u9375\u3002<\/li>\n<li><strong>\u7b2c\u4e09\u7bc4\u5f0f\uff083NF\uff09\uff1a<\/strong> \u79fb\u9664\u50b3\u905e\u4f9d\u8cf4\u3002\u975e\u9375\u5c6c\u6027\u4e0d\u61c9\u4f9d\u8cf4\u65bc\u5176\u4ed6\u975e\u9375\u5c6c\u6027\u3002<\/li>\n<\/ol>\n<p>\u96d6\u7136\u6a19\u6e96\u5316\u81f3\u95dc\u91cd\u8981\uff0c\u4f46\u50c5\u5728\u4ee5\u8b80\u53d6\u70ba\u4e3b\u7684\u5831\u8868\u7cfb\u7d71\u4e2d\u624d\u8003\u616e\u53cd\u6a19\u6e96\u5316\uff0c\u6b64\u6642\u6027\u80fd\u512a\u5148\u65bc\u5b8c\u6574\u6027\u98a8\u96aa\u3002\u52d9\u5fc5\u5728\u6a21\u578b\u4e2d\u660e\u78ba\u8a18\u9304\u9019\u4e9b\u4f8b\u5916\u60c5\u6cc1\u3002 \ud83d\udcdd<\/p>\n<h2>\u932f\u8aa4 4\uff1a\u5ffd\u7565\u5c6c\u6027\u7bc4\u570d\u8207\u8cc7\u6599\u985e\u578b \ud83d\udccf<\/h2>\n<p>\u8868\u683c\u4e2d\u7684\u6bcf\u4e00\u6b04\u90fd\u6709\u4e00\u500b\u7bc4\u570d\uff0c\u5373\u5141\u8a31\u503c\u7684\u96c6\u5408\u3002\u9019\u5305\u62ec\u8cc7\u6599\u985e\u578b\uff08\u6574\u6578\u3001\u5b57\u4e32\u3001\u65e5\u671f\uff09\u548c\u7279\u5b9a\u9650\u5236\uff08\u9577\u5ea6\u3001\u7cbe\u78ba\u5ea6\u3001\u7bc4\u570d\uff09\u3002<\/p>\n<h3>\u554f\u984c<\/h3>\n<p>\u5be6\u9ad4\u95dc\u4fc2\u5716\uff08ERD\uff09\u901a\u5e38\u4ee5\u901a\u7528\u65b9\u5f0f\u986f\u793a\u5c6c\u6027\u3002\u6b04\u4f4d\u53ef\u80fd\u6a19\u793a\u70ba\u300c\u65e5\u671f\u300d\uff0c\u4f46\u672a\u8aaa\u660e\u662f\u5426\u5305\u542b\u6642\u9593\u3002\u4e00\u500b\u300c\u50f9\u683c\u300d\u6b04\u4f4d\u53ef\u80fd\u88ab\u5efa\u6a21\u70ba\u5b57\u4e32\u800c\u975e\u5c0f\u6578\u3002\u9019\u7a2e\u6a21\u7cca\u6027\u5c0e\u81f4\u8cc7\u6599\u8f38\u5165\u4e0d\u4e00\u81f4\u3002\u4f7f\u7528\u8005\u53ef\u80fd\u5728\u4e00\u500b\u5730\u65b9\u8f38\u5165\u300c100.00\u300d\uff0c\u5728\u53e6\u4e00\u500b\u5730\u65b9\u8f38\u5165\u300c100\u300d\uff0c\u9020\u6210\u6392\u5e8f\u8207\u8a08\u7b97\u932f\u8aa4\u3002<\/p>\n<h3>\u5f8c\u679c<\/h3>\n<ul>\n<li><strong>\u8a08\u7b97\u932f\u8aa4\uff1a<\/strong> \u5c07\u6578\u5b57\u7576\u4f5c\u6587\u5b57\u8655\u7406\u6703\u963b\u6b62\u6578\u5b78\u904b\u7b97\u3002<\/li>\n<li><strong>\u5132\u5b58\u7a7a\u9593\u6d6a\u8cbb\uff1a<\/strong> \u4f7f\u7528\u901a\u7528\u7684\u5b57\u4e32\u985e\u578b\u5132\u5b58\u65e5\u671f\uff0c\u6703\u6bd4\u4f7f\u7528\u539f\u751f\u7684\u65e5\u671f\u985e\u578b\u6d88\u8017\u66f4\u591a\u7a7a\u9593\u3002<\/li>\n<li><strong>\u9a57\u8b49\u6f0f\u6d1e\uff1a<\/strong> \u8cc7\u6599\u5eab\u7121\u6cd5\u5f37\u5236\u57f7\u884c\u300c\u50f9\u683c\u300d\u5fc5\u9808\u5927\u65bc\u96f6\u3002<\/li>\n<\/ul>\n<h3>\u89e3\u6c7a\u65b9\u6848<\/h3>\n<p>\u70ba\u5716\u8868\u4e2d\u7684\u6bcf\u500b\u5c6c\u6027\u5b9a\u7fa9\u660e\u78ba\u7684\u7bc4\u570d\u3002\u6307\u5b9a\u7cbe\u78ba\u7684\u8cc7\u6599\u985e\u578b\u4ee5\u53ca\u4efb\u4f55\u9577\u5ea6\u9650\u5236\u3002\u5c0d\u65bc\u91d1\u9322\u503c\uff0c\u4f7f\u7528\u5177\u6709\u56fa\u5b9a\u7cbe\u5ea6\u7684\u5341\u9032\u4f4d\u985e\u578b\u3002\u5c0d\u65bc\u65e5\u671f\uff0c\u6307\u5b9a\u683c\u5f0f\uff08YYYY-MM-DD\uff09\u3002\u5305\u542b\u5f37\u5236\u6b04\u4f4d\u548c\u5141\u8a31\u7bc4\u570d\u7684\u7d04\u675f\u3002\u9019\u53ef\u78ba\u4fdd\u8cc7\u6599\u5eab\u5f15\u64ce\u5728\u4f86\u6e90\u8655\u62d2\u7d55\u7121\u6548\u8cc7\u6599\u3002\ud83d\udcb0<\/p>\n<h2>\u932f\u8aa4 5\uff1a\u5faa\u74b0\u5f15\u7528\u8207\u905e\u8ff4\u95dc\u4fc2 \ud83c\udf00<\/h2>\n<p>\u905e\u8ff4\u95dc\u4fc2\u767c\u751f\u5728\u5be6\u9ad4\u8207\u81ea\u8eab\u76f8\u95dc\u6642\u3002\u4e00\u500b\u5e38\u898b\u7684\u4f8b\u5b50\u662f <em>\u54e1\u5de5<\/em> \u8868\u683c\uff0c\u5176\u4e2d\u6bcf\u4f4d\u54e1\u5de5\u90fd\u6709\u4e00\u4f4d <em>\u7d93\u7406<\/em>\uff0c\u800c\u9019\u4f4d\u7d93\u7406\u4e5f\u662f\u4e00\u540d\u54e1\u5de5\u3002\u932f\u8aa4\u5730\u5efa\u6a21\u6b64\u95dc\u4fc2\u53ef\u80fd\u5c0e\u81f4\u7121\u9650\u5faa\u74b0\u6216\u8cc7\u6599\u4e0d\u4e00\u81f4\u3002<\/p>\n<h3>\u554f\u984c<\/h3>\n<p>\u8a2d\u8a08\u5e2b\u6709\u6642\u6703\u5efa\u7acb\u5916\u9375\u537b\u672a\u5b9a\u7fa9\u5c64\u7d1a\u9650\u5236\u3002\u5982\u679c\u672a\u59a5\u5584\u8655\u7406\u905e\u8ff4\uff0c\u67e5\u8a62\u53ef\u80fd\u8b8a\u6210\u7121\u9650\u5faa\u74b0\u3002\u6b64\u5916\uff0c\u5982\u679c\u81ea\u6211\u5f15\u7528\u5141\u8a31\u5f62\u6210\u5faa\u74b0\uff08\u4f8b\u5982\uff1aA \u7ba1\u7406 B\uff0cB \u7ba1\u7406 C\uff0cC \u7ba1\u7406 A\uff09\uff0c\u5247\u5c64\u7d1a\u7d50\u69cb\u7684\u8cc7\u6599\u5b8c\u6574\u6027\u5c07\u55aa\u5931\u3002<\/p>\n<h3>\u5f8c\u679c<\/h3>\n<ul>\n<li><strong>\u67e5\u8a62\u903e\u6642\uff1a<\/strong>\u6c92\u6709\u6df1\u5ea6\u9650\u5236\u7684\u905e\u8ff4\u67e5\u8a62\u5c07\u5c0e\u81f4\u7cfb\u7d71\u5d29\u6f70\u3002<\/li>\n<li><strong>\u7121\u6548\u7684\u5c64\u7d1a\u7d50\u69cb\uff1a<\/strong>\u5faa\u74b0\u7684\u7ba1\u7406\u93c8\u6703\u6df7\u6dc6\u5831\u544a\u7d50\u69cb\u3002<\/li>\n<li><strong>\u8cc7\u6599\u6a21\u7cca\uff1a<\/strong> \u7121\u6cd5\u660e\u78ba\u5224\u65b7\u5c64\u7d1a\u7d50\u69cb\u7684\u6839\u7bc0\u9ede\u662f\u8ab0\u3002<\/li>\n<\/ul>\n<h3>\u89e3\u6c7a\u65b9\u6848<\/h3>\n<p>\u4ed4\u7d30\u5b9a\u7fa9\u905e\u8ff4\u95dc\u4fc2\u3002\u78ba\u4fdd\u5916\u9375\u53ef\u70ba\u7a7a\uff0c\u4ee5\u5141\u8a31\u6839\u7bc0\u9ede\uff08\u5982\u57f7\u884c\u9577\uff09\u3002\u5be6\u4f5c\u61c9\u7528\u5c64\u6216\u8cc7\u6599\u5eab\u5c64\u7684\u6aa2\u67e5\u4ee5\u9632\u6b62\u5faa\u74b0\u3002\u82e5\u9700\u8907\u96dc\u7684\u5c64\u7d1a\u904d\u6b77\uff0c\u53ef\u4f7f\u7528\u6df1\u5ea6\u6b04\u4f4d\u6216\u8def\u5f91\u5b57\u4e32\u3002\u5728\u8a2d\u8a08\u898f\u683c\u4e2d\u8a18\u8f09\u5c64\u7d1a\u7d50\u69cb\u7684\u6700\u5927\u6df1\u5ea6\u3002\ud83d\udc64<\/p>\n<h2>\u932f\u8aa4 6\uff1a\u4e3b\u9375\u7f3a\u4e4f\u552f\u4e00\u6027\u7d04\u675f \ud83d\udd11<\/h2>\n<p>\u4e3b\u9375\u662f\u8a18\u9304\u7684\u552f\u4e00\u8b58\u5225\u7b26\u3002\u5b83\u662f\u5be6\u9ad4\u5b8c\u6574\u6027\u7684\u57fa\u790e\u3002\u5982\u679c\u4e3b\u9375\u672a\u5f37\u5236\u552f\u4e00\uff0c\u5247\u53ef\u80fd\u51fa\u73fe\u91cd\u8907\u8a18\u9304\u3002<\/p>\n<h3>\u554f\u984c<\/h3>\n<p>\u67d0\u4e9b\u6a21\u578b\u5efa\u8b70\u4f7f\u7528\u4ee3\u7406\u9375\uff08\u5982\u81ea\u52d5\u905e\u589e\u7684 ID\uff09\uff0c\u4f46\u5728\u5716\u8868\u4e2d\u672a\u6a19\u793a\u70ba\u4e3b\u9375\u3002\u6216\u8005\uff0c\u4f7f\u7528\u81ea\u7136\u9375\uff08\u5982\u793e\u6703\u5b89\u5168\u865f\u78bc\uff09\u537b\u672a\u8a2d\u5b9a\u552f\u4e00\u6027\u7d04\u675f\u3002\u9019\u4f7f\u5f97\u8cc7\u6599\u5eab\u5141\u8a31\u540c\u4e00\u908f\u8f2f\u5be6\u9ad4\u51fa\u73fe\u91cd\u8907\u689d\u76ee\u3002<\/p>\n<h3>\u5f8c\u679c<\/h3>\n<ul>\n<li><strong>\u91cd\u8907\u8cc7\u6599\uff1a<\/strong> \u540c\u4e00\u5ba2\u6236\u6216\u7522\u54c1\u51fa\u73fe\u591a\u6b21\u3002<\/li>\n<li><strong>\u66f4\u65b0\u6df7\u6dc6\uff1a<\/strong> \u66f4\u65b0\u53ef\u80fd\u50c5\u9069\u7528\u65bc\u5176\u4e2d\u4e00\u500b\u91cd\u8907\u8a18\u9304\u3002<\/li>\n<li><strong>\u9023\u63a5\u6a21\u7cca\uff1a<\/strong> \u4ee5\u8a72\u9375\u9032\u884c\u9023\u63a5\u7684\u67e5\u8a62\u53ef\u80fd\u610f\u5916\u5730\u8fd4\u56de\u591a\u7b46\u8cc7\u6599\u3002<\/li>\n<\/ul>\n<h3>\u89e3\u6c7a\u65b9\u6848<\/h3>\n<p>\u5728ERD\u4e2d\u59cb\u7d42\u660e\u78ba\u6a19\u793a\u4e3b\u9375\u3002\u4f7f\u7528\u9470\u5319\u5716\u793a\u6216\u7279\u5b9a\u7b26\u865f\u6a19\u8a18\u3002\u78ba\u4fdd\u8a72\u6b04\u4f4d\u5b9a\u7fa9\u70baNOT NULL\u3002\u82e5\u4f7f\u7528\u81ea\u7136\u9375\uff0c\u8acb\u52a0\u5165\u552f\u4e00\u7d04\u675f\u4ee5\u9632\u6b62\u91cd\u8907\u3002\u5c0d\u65bc\u4ee3\u7406\u9375\uff0c\u78ba\u4fdd\u751f\u6210\u6a5f\u5236\u53ef\u9760\u4e14\u7121\u885d\u7a81\u3002 \ud83d\udd12<\/p>\n<h2>\u932f\u8aa4 7\uff1a\u547d\u540d\u898f\u7bc4\u4e0d\u4e00\u81f4 \ud83c\udff7\ufe0f<\/h2>\n<p>\u96d6\u7136\u9019\u770b\u4f3c\u53ea\u662f\u5916\u89c0\u554f\u984c\uff0c\u4f46\u547d\u540d\u898f\u7bc4\u6703\u76f4\u63a5\u5f71\u97ff\u8cc7\u6599\u5b8c\u6574\u6027\u3002\u547d\u540d\u4e0d\u4e00\u81f4\u6703\u5c0e\u81f4\u6df7\u6dc6\uff0c\u4e26\u9020\u6210\u91cd\u8907\u7684\u5be6\u9ad4\u5efa\u7acb\u3002<\/p>\n<h3>\u554f\u984c<\/h3>\n<p>\u4e00\u500b\u8cc7\u6599\u8868\u53ef\u80fd\u4f7f\u7528<code>user_id<\/code>\uff0c\u800c\u53e6\u4e00\u500b\u5247\u4f7f\u7528<code>UserID<\/code> \u6216<code>userIdentifier<\/code>\u3002\u7576\u958b\u767c\u4eba\u54e1\u5efa\u7acb\u67e5\u8a62\u6642\uff0c\u53ef\u80fd\u6703\u6df7\u6dc6\u9019\u4e9b\u540d\u7a31\u3002\u4ed6\u5011\u53ef\u80fd\u5728\u932f\u8aa4\u7684\u6b04\u4f4d\u4e0a\u9032\u884c\u9023\u63a5\uff0c\u6216\u5efa\u7acb\u65b0\u7684\u6b04\u4f4d\uff0c\u91cd\u8907\u73fe\u6709\u7684\u8cc7\u6599\uff0c\u56e0\u70ba\u4ed6\u5011\u6c92\u6709\u8b58\u5225\u51fa\u9019\u4e9b\u540c\u7fa9\u8a5e\u3002<\/p>\n<h3>\u5f8c\u679c<\/h3>\n<ul>\n<li><strong>\u6574\u5408\u5931\u6557\uff1a<\/strong>\u4e0d\u540c\u6a21\u7d44\u7684\u8cc7\u6599\u7121\u6cd5\u6b63\u78ba\u5730\u9032\u884c\u9023\u63a5\u3002<\/li>\n<li><strong>\u7dad\u8b77\u8ca0\u64d4\uff1a<\/strong> \u958b\u767c\u4eba\u54e1\u9700\u82b1\u8cbb\u6642\u9593\u89e3\u8b80\u6bcf\u500b\u6b04\u4f4d\u7684\u542b\u7fa9\u3002<\/li>\n<li><strong>\u7d50\u69cb\u504f\u79fb\uff1a<\/strong> \u9577\u671f\u4e0b\u4f86\uff0c\u8cc7\u6599\u5eab\u7d50\u69cb\u6703\u8b8a\u5f97\u652f\u96e2\u7834\u788e\u4e14\u4e0d\u4e00\u81f4\u3002<\/li>\n<\/ul>\n<h3>\u89e3\u6c7a\u65b9\u6848<\/h3>\n<p>\u5efa\u7acb\u56b4\u683c\u7684\u547d\u540d\u6a19\u6e96\u3002\u6b04\u4f4d\u540d\u7a31\u4f7f\u7528\u5c0f\u5beb\u4e26\u4ee5\u5e95\u7dda\u5206\u9694\u3002\u8cc7\u6599\u8868\u540d\u7a31\u4f7f\u7528\u8907\u6578\u540d\u8a5e\uff08\u4f8b\u5982<code>orders<\/code>\uff0c\u800c\u975e<code>order<\/code>\uff09\u3002\u78ba\u4fdd\u76f8\u95dc\u5be6\u9ad4\u4f7f\u7528\u76f8\u540c\u7684\u5916\u9375\u540d\u7a31\u3002\u5c07\u9019\u4e9b\u898f\u7bc4\u8a18\u9304\u5728\u8cc7\u6599\u5b57\u5178\u4e2d\u3002\u9019\u7a2e\u4e00\u81f4\u6027\u53ef\u964d\u4f4e\u958b\u767c\u4eba\u54e1\u7684\u8a8d\u77e5\u8ca0\u64d4\uff0c\u4e26\u6e1b\u5c11\u932f\u8aa4\u3002 \ud83d\udcd6<\/p>\n<h2>\u5e38\u898b\u5efa\u6a21\u932f\u8aa4\u7e3d\u7d50<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u932f\u8aa4\u985e\u5225<\/th>\n<th>\u4e3b\u8981\u98a8\u96aa<\/th>\n<th>\u5efa\u8b70\u4fee\u6b63<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u6a21\u7cca\u7684\u95dc\u4fc2\u6578\u91cf<\/td>\n<td>\u91cd\u8907\u6216\u8cc7\u6599\u9650\u5236<\/td>\n<td>\u660e\u78ba\u5b9a\u7fa9 1:1\u30011:N\u3001M:N<\/td>\n<\/tr>\n<tr>\n<td>\u907a\u6f0f\u7684\u5916\u9375<\/td>\n<td>\u5b64\u5152\u8a18\u9304<\/td>\n<td>\u5f37\u5236\u57f7\u884c\u53c3\u8003\u5b8c\u6574\u6027\u7d04\u675f<\/td>\n<\/tr>\n<tr>\n<td>\u4e0d\u826f\u7684\u6b63\u898f\u5316<\/td>\n<td>\u66f4\u65b0\/\u63d2\u5165\u7570\u5e38<\/td>\n<td>\u61c9\u7528 1NF\u30012NF\u30013NF \u689d\u6b3e<\/td>\n<\/tr>\n<tr>\n<td>\u932f\u8aa4\u7684\u8cc7\u6599\u985e\u578b<\/td>\n<td>\u8a08\u7b97\u8207\u9a57\u8b49\u932f\u8aa4<\/td>\n<td>\u660e\u78ba\u6307\u5b9a\u7cbe\u78ba\u7684\u8cc7\u6599\u7bc4\u570d\u8207\u985e\u578b<\/td>\n<\/tr>\n<tr>\n<td>\u905e\u8ff4\u5faa\u74b0<\/td>\n<td>\u67e5\u8a62\u903e\u6642<\/td>\n<td>\u9650\u5236\u5c64\u7d1a\u6df1\u5ea6\u4e26\u6aa2\u67e5\u5faa\u74b0<\/td>\n<\/tr>\n<tr>\n<td>\u5f31\u4e3b\u9375<\/td>\n<td>\u91cd\u8907\u8a18\u9304<\/td>\n<td>\u5f37\u5236\u57f7\u884c\u552f\u4e00 + \u975e\u7a7a<\/td>\n<\/tr>\n<tr>\n<td>\u547d\u540d\u4e0d\u4e00\u81f4<\/td>\n<td>\u6574\u5408\u5931\u6557<\/td>\n<td>\u63a1\u7528\u56b4\u683c\u7684\u547d\u540d\u6a19\u6e96<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u7a69\u5065 ERD \u8a2d\u8a08\u7b56\u7565 \ud83d\udee0\ufe0f<\/h2>\n<p>\u9632\u6b62\u9019\u4e9b\u932f\u8aa4\u9700\u8981\u6709\u7d00\u5f8b\u7684\u65b9\u6cd5\u3002\u50c5\u50c5\u756b\u51fa\u7dda\u689d\u662f\u4e0d\u5920\u7684\uff1b\u4f60\u5fc5\u9808\u9a57\u8b49\u908f\u8f2f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u7b56\u7565\uff0c\u4ee5\u78ba\u4fdd\u4f60\u7684\u6a21\u578b\u80fd\u7d93\u5f97\u8d77\u5be9\u67e5\u3002<\/p>\n<ul>\n<li><strong>\u540c\u5115\u5be9\u67e5\uff1a<\/strong> \u8acb\u53e6\u4e00\u4f4d\u67b6\u69cb\u5e2b\u5be9\u67e5\u5716\u8868\u3002\u65b0\u9bae\u7684\u8996\u89d2\u901a\u5e38\u80fd\u767c\u73fe\u5275\u4f5c\u8005\u6240\u5ffd\u7565\u7684\u908f\u8f2f\u6f0f\u6d1e\u3002<\/li>\n<li><strong>\u6a21\u64ec\u8cc7\u6599\u6e2c\u8a66\uff1a<\/strong> \u5728\u5be6\u65bd\u4e4b\u524d\uff0c\u4f7f\u7528\u6a23\u672c\u8cc7\u6599\u586b\u6eff\u6e2c\u8a66\u8cc7\u6599\u5eab\u3002\u5617\u8a66\u9055\u53cd\u4f60\u6240\u8a2d\u8a08\u7684\u898f\u5247\u3002\u770b\u770b\u7cfb\u7d71\u662f\u5426\u6703\u963b\u6b62\u4f60\u3002<\/li>\n<li><strong>\u6587\u4ef6\u8a18\u9304\uff1a<\/strong> \u5728 ERD \u65c1\u908a\u64b0\u5beb\u8cc7\u6599\u5b57\u5178\u3002\u89e3\u91cb\u6bcf\u4e00\u500b\u95dc\u4fc2\u8207\u7d04\u675f\u80cc\u5f8c\u7684\u5546\u696d\u898f\u5247\u3002<\/li>\n<li><strong>\u8fed\u4ee3\u8a2d\u8a08\uff1a<\/strong> \u4e0d\u8981\u671f\u671b\u7b2c\u4e00\u7248\u5c31\u5b8c\u7f8e\u7121\u7f3a\u3002\u96a8\u8457\u5546\u696d\u9700\u6c42\u7684\u6f14\u8b8a\uff0c\u6301\u7e8c\u512a\u5316\u6a21\u578b\u3002<\/li>\n<\/ul>\n<h2>\u5be6\u65bd\u524d\u7684\u9a57\u8b49\u6280\u8853 \ud83e\uddea<\/h2>\n<p>ERD \u78ba\u5b9a\u5f8c\uff0c\u9a57\u8b49\u662f\u4e0b\u4e00\u6b65\u95dc\u9375\u6b65\u9a5f\u3002\u6b64\u904e\u7a0b\u78ba\u4fdd\u8a2d\u8a08\u80fd\u6b63\u78ba\u8f49\u63db\u70ba\u7269\u7406\u7d50\u69cb\u3002<\/p>\n<ol>\n<li><strong>\u8173\u672c\u751f\u6210\uff1a<\/strong> \u4f7f\u7528\u5de5\u5177\u5f9e\u5716\u8868\u751f\u6210 SQL \u8173\u672c\u3002\u5be9\u67e5\u751f\u6210\u7684\u8173\u672c\uff0c\u78ba\u4fdd\u7121\u8a9e\u6cd5\u932f\u8aa4\u6216\u907a\u6f0f\u7684\u7d04\u675f\u3002<\/li>\n<li><strong>\u7d04\u675f\u9a57\u8b49\uff1a<\/strong> \u78ba\u8a8d\u8173\u672c\u4e2d\u7684\u6bcf\u500b\u5916\u9375\u90fd\u8207\u7236\u8868\u4e2d\u7684\u4e3b\u9375\u76f8\u5339\u914d\u3002<\/li>\n<li><strong>\u7d22\u5f15\u5206\u6790\uff1a<\/strong> \u78ba\u4fdd\u5916\u9375\u548c\u552f\u4e00\u7d04\u675f\u5df2\u5efa\u7acb\u7d22\u5f15\uff0c\u4ee5\u63d0\u5347\u6548\u80fd\u3002<\/li>\n<li><strong>\u908a\u754c\u60c5\u6cc1\u5be9\u67e5\uff1a<\/strong> \u8003\u616e\u7a7a\u503c\u3002\u60a8\u7684\u8a2d\u8a08\u4e2d\uff0c\u5fc5\u8981\u6b04\u4f4d\u662f\u5426\u53ef\u80fd\u70ba\u7a7a\uff1f\u82e5\u5426\uff0c\u8acb\u660e\u78ba\u6a19\u793a\u70ba NOT NULL\u3002<\/li>\n<\/ol>\n<p>\u6b64\u968e\u6bb5\u53ef\u6355\u6349\u5728\u8996\u89ba\u5716\u8868\u4e2d\u7121\u6cd5\u986f\u73fe\u7684\u5be6\u65bd\u932f\u8aa4\u3002\u5b83\u5f4c\u88dc\u4e86\u7406\u8ad6\u8207\u73fe\u5be6\u4e4b\u9593\u7684\u5dee\u8ddd\u3002 \ud83d\udd2c<\/p>\n<h2>\u9577\u671f\u7dad\u8b77\u8cc7\u6599\u7d50\u69cb \ud83d\udd04<\/h2>\n<p>\u8cc7\u6599\u5eab\u8a2d\u8a08\u4e26\u975e\u4e00\u6b21\u6027\u4e8b\u4ef6\u3002\u9700\u6c42\u6703\u8b8a\u66f4\uff0c\u8cc7\u6599\u7d50\u69cb\u5fc5\u9808\u6301\u7e8c\u6f14\u9032\uff0c\u540c\u6642\u4e0d\u7834\u58de\u73fe\u6709\u7684\u8cc7\u6599\u5b8c\u6574\u6027\u3002\u4fee\u6539 ERD \u6642\uff0c\u8acb\u9075\u5faa\u4ee5\u4e0b\u6e96\u5247\u3002<\/p>\n<ul>\n<li><strong>\u7248\u672c\u63a7\u5236\uff1a<\/strong> 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