{"id":99,"date":"2026-04-02T09:17:25","date_gmt":"2026-04-02T09:17:25","guid":{"rendered":"https:\/\/www.we-notes.com\/tw\/er-diagram-best-practices-normalization-pitfalls\/"},"modified":"2026-04-02T09:17:25","modified_gmt":"2026-04-02T09:17:25","slug":"er-diagram-best-practices-normalization-pitfalls","status":"publish","type":"post","link":"https:\/\/www.we-notes.com\/tw\/er-diagram-best-practices-normalization-pitfalls\/","title":{"rendered":"ER\u5716\u7684\u6700\u4f73\u5be6\u8e10\uff1a\u5728\u4e2d\u7d1a\u5c08\u6848\u4e2d\u907f\u514d\u898f\u7bc4\u5316\u7684\u9677\u9631"},"content":{"rendered":"<p>\u8a2d\u8a08\u7a69\u5065\u7684\u8cc7\u6599\u7d50\u69cb\u662f\u4efb\u4f55\u6210\u529f\u8edf\u9ad4\u61c9\u7528\u7684\u57fa\u77f3\u3002\u7576\u5c08\u6848\u8d85\u8d8a\u7c21\u55ae\u539f\u578b\u4e26\u9032\u5165\u4e2d\u7d1a\u968e\u6bb5\u6642\uff0c\u8cc7\u6599\u95dc\u4fc2\u7684\u8907\u96dc\u6027\u6703\u986f\u8457\u589e\u52a0\u3002\u9019\u6b63\u662f\u5be6\u9ad4\u95dc\u4fc2\u5716\uff08ERD\uff09\u6210\u70ba\u6e9d\u901a\u8207\u898f\u5283\u95dc\u9375\u5de5\u5177\u7684\u6642\u523b\u3002\u7136\u800c\uff0c\u4e00\u5f35\u7e6a\u88fd\u826f\u597d\u7684\u5716\u8868\u4e26\u4e0d\u80fd\u4fdd\u8b49\u8cc7\u6599\u5eab\u904b\u4f5c\u826f\u597d\u3002\u8a31\u591a\u958b\u767c\u8005\u5728\u898f\u7bc4\u5316\u904e\u7a0b\u4e2d\u9677\u5165\u9677\u9631\uff0c\u5c0e\u81f4\u5f8c\u7e8c\u958b\u767c\u968e\u6bb5\u51fa\u73fe\u6548\u80fd\u74f6\u9838\u6216\u8cc7\u6599\u5b8c\u6574\u6027\u554f\u984c\u3002<\/p>\n<p>\u672c\u6307\u5357\u63a2\u8a0e\u4e86ER\u5716\u7684\u5fc5\u8981\u6700\u4f73\u5be6\u8e10\uff0c\u7279\u5225\u8457\u91cd\u65bc\u907f\u514d\u5e38\u898b\u7684\u898f\u7bc4\u5316\u9677\u9631\u3002\u6211\u5011\u5c07\u6aa2\u8996\u5982\u4f55\u5728\u8cc7\u6599\u5b8c\u6574\u6027\u8207\u6548\u80fd\u4e4b\u9593\u53d6\u5f97\u5e73\u8861\uff0c\u78ba\u4fdd\u60a8\u7684\u8cc7\u6599\u7d50\u69cb\u5728\u5c08\u6848\u64f4\u5c55\u6642\u4ecd\u5177\u53ef\u7dad\u8b77\u6027\u3002\u7121\u8ad6\u60a8\u662f\u70ba\u4e2d\u578b\u96fb\u5546\u5e73\u53f0\u6216\u8907\u96dc\u7684\u7ba1\u7406\u7cfb\u7d71\u9032\u884c\u8a2d\u8a08\uff0c\u9019\u4e9b\u539f\u5247\u90fd\u5c07\u5e6b\u52a9\u60a8\u5efa\u7acb\u7d93\u5f97\u8d77\u6642\u9593\u8003\u9a57\u7684\u57fa\u790e\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Charcoal sketch infographic illustrating ER diagram best practices: core components (entities, attributes, relationships), normalization levels (1NF, 2NF, 3NF), common pitfalls (over-normalization, under-normalization, circular dependencies, implicit relationships), and performance vs integrity trade-offs for intermediate database projects\" decoding=\"async\" src=\"https:\/\/www.we-notes.com\/wp-content\/uploads\/2026\/04\/er-diagram-normalization-best-practices-infographic.jpg\"\/><\/figure>\n<\/div>\n<h2>\u7406\u89e3ER\u5efa\u6a21\u7684\u6838\u5fc3\u5143\u4ef6 \ud83c\udfd7\ufe0f<\/h2>\n<p>\u5728\u6df1\u5165\u898f\u7bc4\u5316\u4e4b\u524d\uff0c\u5efa\u7acb\u5c0d\u57fa\u672c\u69cb\u5efa\u6a21\u584a\u7684\u6e05\u6670\u7406\u89e3\u81f3\u95dc\u91cd\u8981\u3002ER\u5716\u900f\u904e\u4e09\u500b\u4e3b\u8981\u5143\u7d20\u4f86\u5448\u73fe\u8cc7\u6599\u5eab\u7684\u7d50\u69cb\uff1a<\/p>\n<ul>\n<li><strong>\u5be6\u9ad4\uff1a<\/strong>\u4ee5\u77e9\u5f62\u8868\u793a\uff0c\u5c0d\u61c9\u8cc7\u6599\u5eab\u4e2d\u7684\u8cc7\u6599\u8868\u3002\u5b83\u5011\u63cf\u8ff0\u611f\u8208\u8da3\u7684\u7269\u4ef6\uff0c\u4f8b\u5982<em>\u5ba2\u6236<\/em>, <em>\u8a02\u55ae<\/em>\uff0c\u6216<em>\u7522\u54c1<\/em>.<\/li>\n<li><strong>\u5c6c\u6027\uff1a<\/strong>\u4ee5\u6a62\u5713\u8868\u793a\uff0c\u9019\u4e9b\u662f\u5be6\u9ad4\u7684\u7279\u5b9a\u5c6c\u6027\u3002\u5c0d\u65bc\u4e00\u500b<em>\u5ba2\u6236<\/em>\uff0c\u5c6c\u6027\u53ef\u80fd\u5305\u62ec<em>\u5ba2\u6236\u7de8\u865f<\/em>, <em>\u59d3\u540d<\/em>\uff0c\u4ee5\u53ca<em>\u96fb\u5b50\u90f5\u4ef6\u5730\u5740<\/em>.<\/li>\n<li><strong>\u95dc\u4fc2\uff1a<\/strong>\u4ee5\u83f1\u5f62\u6216\u9023\u63a5\u7dda\u8868\u793a\uff0c\u9019\u4e9b\u5b9a\u7fa9\u4e86\u5be6\u9ad4\u4e4b\u9593\u7684\u4e92\u52d5\u65b9\u5f0f\u3002\u95dc\u4fc2\u8868\u793a\u4e00\u500b\u8cc7\u6599\u8868\u4e2d\u7684\u8cc7\u6599\u5982\u4f55\u8207\u53e6\u4e00\u500b\u8cc7\u6599\u8868\u4e2d\u7684\u8cc7\u6599\u76f8\u9023\u3002<\/li>\n<\/ul>\n<p>\u5728\u4e2d\u7d1a\u5c08\u6848\u4e2d\uff0c\u8907\u96dc\u6027\u901a\u5e38\u9ad4\u73fe\u5728\u95dc\u4fc2\u4e0a\u3002\u7c21\u55ae\u7684\u4e00\u5c0d\u4e00\u95dc\u4fc2\u5f88\u76f4\u89c0\uff0c\u4f46\u4e00\u5c0d\u591a\u95dc\u4fc2\u9700\u8981\u4ed4\u7d30\u8655\u7406\u4ee5\u907f\u514d\u91cd\u8907\u3002\u8996\u89ba\u4e0a\u7684\u6e05\u6670\u5ea6\u8207\u908f\u8f2f\u6b63\u78ba\u6027\u540c\u7b49\u91cd\u8981\u3002\u4e00\u5f35\u96dc\u4e82\u6216\u542b\u7cca\u7684\u5716\u8868\u53ef\u80fd\u5c0e\u81f4\u958b\u767c\u8005\u8aa4\u89e3\uff0c\u9032\u800c\u5728\u5be6\u4f5c\u968e\u6bb5\u7522\u751f\u8cc7\u6599\u7d50\u69cb\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002<\/p>\n<h2>\u898f\u7bc4\u5316\u904e\u7a0b\uff1a\u6df1\u5165\u63a2\u8a0e \ud83d\udd0d<\/h2>\n<p>\u898f\u7bc4\u5316\u662f\u7cfb\u7d71\u6027\u5730\u7d44\u7e54\u8cc7\u6599\u5eab\u4e2d\u8cc7\u6599\u4ee5\u6e1b\u5c11\u5197\u9918\u4e26\u63d0\u5347\u8cc7\u6599\u5b8c\u6574\u6027\u7684\u904e\u7a0b\u3002\u96d6\u7136\u5e38\u88ab\u6559\u5c0e\u70ba\u4e00\u7d44\u56b4\u683c\u7684\u898f\u5247\uff0c\u4f46\u5be6\u969b\u4e0a\u662f\u4e00\u7a2e\u5e73\u8861\u3002\u5728\u4e2d\u7d1a\u5c08\u6848\u4e2d\uff0c\u76ee\u6a19\u4e0d\u4e00\u5b9a\u662f\u9054\u5230\u6700\u9ad8\u7684\u898f\u7bc4\u5316\u5f62\u5f0f\uff0c\u800c\u662f\u70ba\u7279\u5b9a\u4f7f\u7528\u60c5\u5883\u5be6\u73fe\u6700\u6709\u6548\u7684\u7d50\u69cb\u3002<\/p>\n<h3>\u7b2c\u4e00\u898f\u7bc4\u5316\u5f62\u5f0f\uff081NF\uff09\uff1a\u57fa\u790e<\/h3>\n<p>\u7b2c\u4e00\u6b65\u662f\u78ba\u4fdd\u539f\u5b50\u6027\u3002\u8cc7\u6599\u8868\u4e2d\u7684\u6bcf\u4e00\u6b04\u90fd\u5fc5\u9808\u53ea\u5305\u542b\u55ae\u4e00\u503c\u3002\u55ae\u5143\u683c\u5167\u4e0d\u5141\u8a31\u51fa\u73fe\u91cd\u8907\u7fa4\u7d44\u6216\u9663\u5217\u3002<\/p>\n<ul>\n<li><strong>\u6aa2\u67e5\uff1a<\/strong>\u6bcf\u4e00\u5217\u662f\u5426\u90fd\u6709\u4e00\u500b\u552f\u4e00\u7684\u8b58\u5225\u78bc\uff08\u4e3b\u9375\uff09\uff1f<\/li>\n<li><strong>\u6aa2\u67e5\uff1a<\/strong>\u6240\u6709\u6b04\u4f4d\u662f\u5426\u50c5\u5305\u542b\u55ae\u4e00\u503c\uff1f<\/li>\n<li><strong>\u7bc4\u4f8b\uff1a<\/strong> \u4e00\u500b <em>Products<\/em> \u8868\u683c\u4e0d\u61c9\u5177\u6709\u50cf <em>Colors<\/em> \u9019\u6a23\u5305\u542b\u300c\u7d05\u8272\u3001\u85cd\u8272\u3001\u7da0\u8272\u300d\u7684\u6b04\u4f4d\u3002\u76f8\u53cd\u5730\uff0c\u61c9\u5efa\u7acb\u4e00\u500b\u7368\u7acb\u7684 <em>ProductColors<\/em> \u8868\u683c\u3002<\/li>\n<\/ul>\n<h3>\u7b2c\u4e8c\u7bc4\u5f0f\uff082NF\uff09\uff1a\u6d88\u9664\u90e8\u5206\u4f9d\u8cf4<\/h3>\n<p>\u4e00\u65e6\u8868\u683c\u9054\u5230\u7b2c\u4e00\u7bc4\u5f0f\uff081NF\uff09\uff0c\u4e5f\u5fc5\u9808\u9054\u5230\u7b2c\u4e8c\u7bc4\u5f0f\uff082NF\uff09\u3002\u9019\u8868\u793a\u5fc5\u9808\u6d88\u9664\u90e8\u5206\u4f9d\u8cf4\u3002\u6240\u6709\u975e\u9375\u5c6c\u6027\u90fd\u5fc5\u9808\u4f9d\u8cf4\u65bc\u6574\u500b\u4e3b\u9375\uff0c\u800c\u4e0d\u80fd\u50c5\u50c5\u4f9d\u8cf4\u5176\u4e00\u90e8\u5206\u3002\u7576\u8655\u7406\u8907\u5408\u9375\u6642\uff0c\u9019\u4e00\u9ede\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<ul>\n<li><strong>\u898f\u5247\uff1a<\/strong> \u5982\u679c\u4e00\u500b\u8868\u683c\u5177\u6709\u8907\u5408\u4e3b\u9375\uff08A + B\uff09\uff0c\u5247\u6240\u6709\u5176\u4ed6\u6b04\u4f4d\u90fd\u5fc5\u9808\u540c\u6642\u4f9d\u8cf4 A \u548c B\uff0c\u800c\u4e0d\u80fd\u50c5\u50c5\u4f9d\u8cf4 A\u3002<\/li>\n<li><strong>\u61c9\u7528\uff1a<\/strong> \u5728\u4e00\u500b <em>OrderDetails<\/em> \u8868\u683c\u4e2d\uff0c\u5176\u8907\u5408\u9375\u70ba <em>OrderID<\/em> \u548c <em>ProductID<\/em>\uff0c\u5176\u4e2d <em>Quantity<\/em> \u4f9d\u8cf4\u65bc\u5169\u8005\u3002\u7136\u800c\uff0c<em>ProductName<\/em> \u50c5\u4f9d\u8cf4\u65bc <em>ProductID<\/em>\u3002\u79fb\u52d5 <em>\u7522\u54c1\u540d\u7a31<\/em> \u5230\u4e00\u500b <em>\u7522\u54c1<\/em> \u8868\u89e3\u6c7a\u4e86\u9019\u500b\u554f\u984c\u3002<\/li>\n<\/ul>\n<h3>\u7b2c\u4e09\u7bc4\u5f0f\uff083NF\uff09\uff1a\u79fb\u9664\u50b3\u905e\u4f9d\u8cf4<\/h3>\n<p>3NF \u662f\u4e2d\u7d1a\u5c08\u6848\u4e2d\u6700\u5e38\u898b\u7684\u76ee\u6a19\u3002\u5b83\u8981\u6c42\u4efb\u4f55\u975e\u9375\u5c6c\u6027\u90fd\u4e0d\u80fd\u4f9d\u8cf4\u65bc\u53e6\u4e00\u500b\u975e\u9375\u5c6c\u6027\u3002\u6240\u6709\u975e\u9375\u5c6c\u6027\u90fd\u5fc5\u9808\u76f4\u63a5\u4f9d\u8cf4\u65bc\u4e3b\u9375\u3002<\/p>\n<ul>\n<li><strong>\u60c5\u5883\uff1a<\/strong> \u4e00\u500b <em>\u54e1\u5de5<\/em> \u8868\u5305\u542b <em>\u54e1\u5de5\u7de8\u865f<\/em>, <em>\u90e8\u9580\u7de8\u865f<\/em>\uff0c\u4ee5\u53ca <em>\u90e8\u9580\u540d\u7a31<\/em>.<\/li>\n<li><strong>\u554f\u984c\uff1a<\/strong> <em>\u90e8\u9580\u540d\u7a31<\/em> \u4f9d\u8cf4\u65bc <em>\u90e8\u9580\u7de8\u865f<\/em>\uff0c\u800c\u4e0d\u662f <em>\u54e1\u5de5\u7de8\u865f<\/em>.<\/li>\n<li><strong>\u89e3\u6c7a\u65b9\u6848\uff1a<\/strong> \u79fb\u52d5 <em>\u90e8\u9580\u540d\u7a31<\/em> \u5230\u4e00\u500b <em>\u90e8\u9580<\/em> \u8868\uff0c\u900f\u904e <em>\u90e8\u9580\u7de8\u865f<\/em>.<\/li>\n<\/ul>\n<h2>\u4e2d\u7d1a\u5c08\u6848\u4e2d\u5e38\u898b\u7684\u6b63\u898f\u5316\u9677\u9631 \u26a0\ufe0f<\/h2>\n<p>\u96d6\u7136\u6b63\u898f\u5316\u529f\u80fd\u5f37\u5927\uff0c\u4f46\u76f2\u76ee\u61c9\u7528\u53ef\u80fd\u5c0e\u81f4\u91cd\u5927\u554f\u984c\u3002\u4e2d\u7d1a\u5c08\u6848\u901a\u5e38\u5177\u6709\u7368\u7279\u7684\u9700\u6c42\uff0c\u9700\u8981\u63a1\u53d6\u52d9\u5be6\u7684\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u6a21\u5f0f\u8a2d\u8a08\u904e\u7a0b\u4e2d\u5e38\u898b\u7684\u9677\u9631\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u9677\u9631<\/th>\n<th>\u5f8c\u679c<\/th>\n<th>\u89e3\u6c7a\u65b9\u6848<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u904e\u5ea6\u6b63\u898f\u5316<\/strong><\/td>\n<td>\u8868\u592a\u591a\u4e14\u8907\u96dc\u7684\u9023\u63a5\u6703\u62d6\u6162\u8b80\u53d6\u4f5c\u696d\u3002<\/td>\n<td><strong>\u7b56\u7565\u6027\u5730\u53cd\u6b63\u898f\u5316<\/strong>\uff1a\u91dd\u5c0d\u7d93\u5e38\u5b58\u53d6\u7684\u8b80\u53d6\u5bc6\u96c6\u578b\u8cc7\u6599\uff0c\u5408\u4f75\u8868\u683c\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6b63\u898f\u5316\u4e0d\u8db3<\/strong><\/td>\n<td>\u8cc7\u6599\u91cd\u8907\u6703\u5c0e\u81f4\u66f4\u65b0\u7570\u5e38\u8207\u5132\u5b58\u7a7a\u9593\u6d6a\u8cbb\u3002<\/td>\n<td><strong>\u5f37\u5236\u57f7\u884c\u7b2c\u4e09\u6b63\u898f\u5316\u5f62\u5f0f<\/strong>\uff1a\u78ba\u4fdd\u975e\u9375\u5c6c\u6027\u4e0d\u4f9d\u8cf4\u65bc\u5176\u4ed6\u975e\u9375\u5c6c\u6027\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>\u5faa\u74b0\u4f9d\u8cf4<\/strong><\/td>\n<td>\u5916\u9375\u6703\u5f62\u6210\u8ff4\u5708\uff0c\u4f7f\u8cc7\u6599\u522a\u9664\u8b8a\u5f97\u56f0\u96e3\u3002<\/td>\n<td><strong>\u5be9\u67e5\u95dc\u4fc2<\/strong>\uff1a\u5be9\u67e5\u6240\u6709\u5916\u9375\u7d04\u675f\u662f\u5426\u5b58\u5728\u8ff4\u5708\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>\u96b1\u542b\u95dc\u4fc2<\/strong><\/td>\n<td>\u908f\u8f2f\u96b1\u85cf\u5728\u61c9\u7528\u7a0b\u5f0f\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u800c\u975e\u8cc7\u6599\u5eab\u6a21\u5f0f\u4e2d\u3002<\/td>\n<td><strong>\u4f7f\u5176\u660e\u78ba\u5316<\/strong>\uff1a\u4f7f\u7528\u5916\u9375\u5728\u8cc7\u6599\u5eab\u4e2d\u5f37\u5236\u57f7\u884c\u95dc\u4fc2\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u9677\u9631 1\uff1a\u6548\u80fd\u9677\u9631<\/h3>\n<p>\u6700\u5e38\u898b\u7684\u932f\u8aa4\u4e4b\u4e00\u662f\u8ffd\u6c42\u5b8c\u7f8e\u7684\u6b63\u898f\u5316\uff0c\u537b\u5ffd\u7565\u4e86\u67e5\u8a62\u6548\u80fd\u3002\u5728\u4e2d\u7d1a\u5c08\u6848\u4e2d\uff0c\u4f60\u53ef\u80fd\u6703\u6709\u6578\u767e\u842c\u7b46\u8a18\u9304\u3002\u4e00\u500b\u9700\u8981\u9023\u63a5\u4e94\u500b\u4e0d\u540c\u8868\u683c\u4f86\u53d6\u5f97\u55ae\u4e00\u4f7f\u7528\u8005\u8cc7\u6599\u7684\u67e5\u8a62\u53ef\u80fd\u5f88\u6162\u3002<\/p>\n<ul>\n<li><strong>\u8b58\u5225\u71b1\u9580\u8def\u5f91\uff1a<\/strong> \u5224\u65b7\u54ea\u4e9b\u67e5\u8a62\u57f7\u884c\u6700\u983b\u7e41\u3002<\/li>\n<li><strong> \u8b80\u53d6\u8207\u5beb\u5165\uff1a<\/strong> \u5982\u679c\u4f60\u7684\u61c9\u7528\u7a0b\u5f0f\u4ee5\u8b80\u53d6\u70ba\u4e3b\uff0c\u53ef\u8003\u616e\u53cd\u6b63\u898f\u5316\u7279\u5b9a\u6b04\u4f4d\u3002<\/li>\n<li><strong> \u7269\u5316\u6aa2\u8996\uff1a<\/strong> \u4f7f\u7528\u8cc7\u6599\u5eab\u6aa2\u8996\u4f86\u5132\u5b58\u8907\u96dc\u805a\u5408\u7684\u9810\u5148\u8a08\u7b97\u7d50\u679c\u3002<\/li>\n<\/ul>\n<h3>\u9677\u96312\uff1a\u5ffd\u7565\u57fa\u6578\u7d04\u675f<\/h3>\n<p>\u57fa\u6578\u5b9a\u7fa9\u4e86\u4e00\u500b\u5be6\u9ad4\u7684\u5be6\u4f8b\u8207\u53e6\u4e00\u500b\u5be6\u9ad4\u7684\u6bcf\u500b\u5be6\u4f8b\u4e4b\u9593\u53ef\u4ee5\u6216\u5fc5\u9808\u95dc\u806f\u7684\u6578\u91cf\u3002\u5728ER\u5716\u4e2d\u672a\u80fd\u6b63\u78ba\u5b9a\u7fa9\u6b64\u7d04\u675f\uff0c\u5c07\u5c0e\u81f4\u8cc7\u6599\u932f\u8aa4\u3002<\/p>\n<ul>\n<li><strong>\u4e00\u5c0d\u4e00\uff1a<\/strong> \u4e00\u500b\u4f7f\u7528\u8005\u6070\u597d\u6709\u4e00\u500b\u500b\u4eba\u6a94\u6848\u3002 (\u4f8b\u5982\uff0c<em>\u4f7f\u7528\u8005<\/em> \u548c <em>\u4f7f\u7528\u8005\u500b\u4eba\u6a94\u6848<\/em>).<\/li>\n<li><strong>\u4e00\u5c0d\u591a\uff1a<\/strong> \u4e00\u500b\u90e8\u9580\u64c1\u6709\u591a\u540d\u54e1\u5de5\u3002 (\u4f8b\u5982\uff0c<em>\u90e8\u9580<\/em> \u548c <em>\u54e1\u5de5<\/em>).<\/li>\n<li><strong>\u591a\u5c0d\u591a\uff1a<\/strong> \u4e00\u540d\u5b78\u751f\u53ef\u4ee5\u8a3b\u518a\u591a\u9580\u8ab2\u7a0b\uff0c\u800c\u4e00\u9580\u8ab2\u7a0b\u4e5f\u64c1\u6709\u591a\u540d\u5b78\u751f\u3002\u9019\u9700\u8981\u4e00\u500b\u806f\u7d50\u8868\u3002<\/li>\n<\/ul>\n<p>\u5728\u8a2d\u8a08ER\u5716\u6642\uff0c\u61c9\u660e\u78ba\u6a19\u793a\u9019\u4e9b\u7d04\u675f\u3002\u6b64\u8655\u7684\u6a21\u7cca\u6027\u7d93\u5e38\u5c0e\u81f4\u61c9\u7528\u7a0b\u5f0f\u932f\u8aa4\uff0c\u56e0\u70ba\u7a0b\u5f0f\u78bc\u5047\u8a2d\u4e86\u8cc7\u6599\u5eab\u4e2d\u4e26\u4e0d\u5b58\u5728\u7684\u95dc\u4fc2\u3002<\/p>\n<h2>\u6e05\u6670\u5ea6\u7684\u8996\u89ba\u8a2d\u8a08\u6a19\u6e96 \ud83d\udcca<\/h2>\n<p>\u4e00\u500b\u5728\u908f\u8f2f\u4e0a\u904b\u4f5c\u826f\u597d\u4f46\u8996\u89ba\u4e0a\u4ee4\u4eba\u56f0\u60d1\u7684\u8cc7\u6599\u7d50\u69cb\u662f\u4e00\u7a2e\u8ca0\u64d4\u3002\u4e2d\u7b49\u898f\u6a21\u7684\u5c08\u6848\u901a\u5e38\u6d89\u53ca\u591a\u540d\u958b\u767c\u8005\u5728\u4e0d\u540c\u6a21\u7d44\u4e0a\u5de5\u4f5c\u3002ER\u5716\u5fc5\u9808\u4f5c\u70ba\u4e00\u7a2e\u5171\u901a\u8a9e\u8a00\u3002<\/p>\n<ul>\n<li><strong>\u4e00\u81f4\u7684\u547d\u540d\u6163\u4f8b\uff1a<\/strong> \u8868\u683c\u4f7f\u7528\u55ae\u6578\u540d\u8a5e\uff08\u4f8b\u5982\uff0c<em>\u5ba2\u6236<\/em> \u800c\u4e0d\u662f <em>\u5ba2\u6236\u5011<\/em>\uff09\uff0c\u6b04\u4f4d\u540d\u7a31\u4f7f\u7528\u86c7\u5f62\u547d\u540d\u6cd5\uff08\u4f8b\u5982\uff0c<em>first_name<\/em>).<\/li>\n<li><strong>\u908f\u8f2f\u5206\u7d44\uff1a<\/strong> \u5c07\u76f8\u95dc\u7684\u5be6\u9ad4\u5728\u756b\u5e03\u4e0a\u96c6\u4e2d\u653e\u7f6e\u3002\u5c07 <em>\u8a02\u55ae<\/em>, <em>\u8a02\u55ae\u9805\u76ee<\/em>\uff0c\u4ee5\u53ca<em>\u7522\u54c1<\/em>\u5f7c\u6b64\u9760\u8fd1\u3002<\/li>\n<li><strong>\u984f\u8272\u7de8\u78bc\uff1a<\/strong>\u70ba\u4e0d\u540c\u985e\u578b\u7684\u5be6\u9ad4\uff08\u4f8b\u5982\uff0c\u6838\u5fc3\u8cc7\u6599\u8868\u8207\u8a2d\u5b9a\u8cc7\u6599\u8868\uff09\u4f7f\u7528\u4e0d\u540c\u7684\u984f\u8272\uff0c\u4ee5\u5354\u52a9\u5feb\u901f\u8fa8\u8b58\u3002<\/li>\n<li><strong>\u6a19\u793a\u95dc\u4fc2\uff1a<\/strong> \u7d55\u5c0d\u4e0d\u8981\u5728\u8cc7\u6599\u8868\u4e4b\u9593\u7559\u7a7a\u884c\u800c\u4e0d\u52a0\u6a19\u7c64\u3002\u8acb\u660e\u78ba\u6a19\u793a\u95dc\u4fc2\u985e\u578b\uff08\u4f8b\u5982\u300c\u64c1\u6709\u8a31\u591a\u300d\u3001\u300c\u662f\u2026\u2026\u7684\u4e00\u90e8\u5206\u300d\uff09\u3002<\/li>\n<\/ul>\n<p>\u5728\u6700\u7d42\u78ba\u5b9a\u60a8\u7684\u5716\u8868\u524d\uff0c\u8acb\u8003\u616e\u4ee5\u4e0b\u6e05\u55ae\uff1a<\/p>\n<ul>\n<li><strong>\u6240\u6709\u4e3b\u9375\u662f\u5426\u90fd\u6e05\u695a\u6a19\u793a\uff1f<\/strong><\/li>\n<li><strong>\u5916\u9375\u662f\u5426\u4e00\u81f4\u5730\u6a19\u793a\uff1f<\/strong><\/li>\n<li><strong>\u95dc\u4fc2\u65b9\u5411\u662f\u5426\u660e\u78ba\uff08\u5f9e\u7236\u8cc7\u6599\u8868\u5230\u5b50\u8cc7\u6599\u8868\uff09\uff1f<\/strong><\/li>\n<li><strong>\u53ef\u9078\u8207\u5fc5\u8981\u95dc\u4fc2\u662f\u5426\u5df2\u5340\u5206\uff1f<\/strong><\/li>\n<\/ul>\n<h2>\u8655\u7406\u591a\u5c0d\u591a\u95dc\u4fc2 \ud83d\udd04<\/h2>\n<p>\u591a\u5c0d\u591a\u95dc\u4fc2\u662fER\u6a21\u578b\u4e2d\u6700\u8907\u96dc\u7684\u90e8\u5206\u3002\u5b83\u5011\u7121\u6cd5\u50c5\u900f\u904e\u55ae\u4e00\u5916\u9375\u4f86\u8868\u793a\uff0c\u800c\u9700\u8981\u4e00\u500b\u95dc\u806f\u8cc7\u6599\u8868\uff0c\u901a\u5e38\u7a31\u70ba\u9023\u7d50\u8cc7\u6599\u8868\u6216\u6a4b\u63a5\u8cc7\u6599\u8868\u3002<\/p>\n<p>\u8a2d\u8a08\u9019\u4e9b\u8cc7\u6599\u8868\u6642\uff0c\u907f\u514d\u50c5\u5efa\u7acb\u7c21\u55ae\u7684\u4f54\u4f4d\u7b26\u3002\u9023\u7d50\u8cc7\u6599\u8868\u61c9\u5305\u542b\u8207\u95dc\u4fc2\u672c\u8eab\u76f8\u95dc\u7684\u6709\u610f\u7fa9\u8cc7\u6599\u3002<\/p>\n<ul>\n<li><strong>\u4e0d\u826f\u8a2d\u8a08\uff1a<\/strong> \u4e00\u500b\u50c5\u5305\u542b<em>UserID<\/em> \u548c<em>GroupID<\/em>.<\/li>\n<li><strong>\u826f\u597d\u8a2d\u8a08\uff1a<\/strong> \u4e00\u500b\u5305\u542b<em>UserID<\/em>, <em>GroupID<\/em>, <em>JoinDate<\/em>\uff0c\u4ee5\u53ca<em>\u89d2\u8272<\/em>.<\/li>\n<\/ul>\n<p>\u9019\u7a2e\u65b9\u6cd5\u8b93\u60a8\u53ef\u4ee5\u5728\u4e0d\u9055\u53cd\u898f\u7bc4\u5316\u898f\u5247\u7684\u60c5\u6cc1\u4e0b\u5132\u5b58\u6709\u95dc\u95dc\u4fc2\u7684\u5143\u6578\u64da\u3002\u540c\u6642\u4e5f\u652f\u63f4\u5982\u300c\u627e\u51fa\u5728\u65e5\u671f Y \u4e4b\u5f8c\u52a0\u5165\u7fa4\u7d44 X \u7684\u6240\u6709\u4f7f\u7528\u8005\u300d\u4e4b\u985e\u7684\u67e5\u8a62\u3002<\/p>\n<h2>\u6548\u80fd\u8207\u5b8c\u6574\u6027\u4e4b\u9593\u7684\u6b0a\u8861 \ud83d\udee1\ufe0f<\/h2>\n<p>\u4e26\u4e0d\u5b58\u5728\u5b8c\u7f8e\u7684\u8cc7\u6599\u5eab\u7d50\u69cb\u3002\u6bcf\u4e00\u500b\u8a2d\u8a08\u6c7a\u7b56\u90fd\u6d89\u53ca\u6b0a\u8861\u3002\u5728\u4e2d\u7b49\u898f\u6a21\u7684\u5c08\u6848\u4e2d\uff0c\u98a8\u96aa\u9ad8\u65bc\u539f\u578b\u968e\u6bb5\uff0c\u4f46\u4f4e\u65bc\u4f01\u696d\u7d1a\u7cfb\u7d71\u3002\u60a8\u5fc5\u9808\u6839\u64da\u696d\u52d9\u9700\u6c42\u4f86\u9032\u884c\u512a\u5148\u6392\u5e8f\u3002<\/p>\n<h3>\u8cc7\u6599\u5b8c\u6574\u6027<\/h3>\n<p>\u898f\u7bc4\u5316\u78ba\u4fdd\u4e86\u5b8c\u6574\u6027\u3002\u82e5\u5b8c\u5168\u9032\u884c\u898f\u7bc4\u5316\uff0c\u53ef\u907f\u514d\u91cd\u8907\u8cc7\u6599\u4e26\u78ba\u4fdd\u4e00\u81f4\u6027\u3002\u7136\u800c\uff0c\u9019\u6703\u5e36\u4f86\u66f4\u8907\u96dc\u7684\u9023\u63a5\u64cd\u4f5c\u6210\u672c\u3002<\/p>\n<ul>\n<li><strong>\u5916\u9375\uff1a<\/strong> 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