{"id":1666,"date":"2026-04-06T16:52:31","date_gmt":"2026-04-06T16:52:31","guid":{"rendered":"https:\/\/www.viz-note.com\/tw\/refactoring-overgrown-erd-without-data-loss\/"},"modified":"2026-04-06T16:52:31","modified_gmt":"2026-04-06T16:52:31","slug":"refactoring-overgrown-erd-without-data-loss","status":"publish","type":"post","link":"https:\/\/www.viz-note.com\/tw\/refactoring-overgrown-erd-without-data-loss\/","title":{"rendered":"\u7121\u6578\u64da\u640d\u5931\u91cd\u69cb\u904e\u5ea6\u81a8\u8139\u5be6\u9ad4\u95dc\u4fc2\u5716\u7684\u5feb\u901f\u5165\u9580\u6307\u5357"},"content":{"rendered":"<p>\u8cc7\u6599\u5eab\u6a21\u5f0f\u662f\u6d3b\u7684\u5be6\u9ad4\u3002\u5b83\u5011\u96a8\u8457\u6240\u652f\u63f4\u7684\u696d\u52d9\u908f\u8f2f\u4e00\u540c\u6f14\u8b8a\u3002\u96a8\u8457\u6642\u9593\u63a8\u79fb\uff0c\u7576\u9700\u6c42\u8b8a\u52d5\u4e14\u65b0\u529f\u80fd\u88ab\u5f15\u5165\u6642\uff0c\u5e95\u5c64\u7684\u8cc7\u6599\u7d50\u69cb\u5f80\u5f80\u8b8a\u5f97\u8907\u96dc\u3002\u9019\u7a2e\u8907\u96dc\u6027\u5728\u8996\u89ba\u4e0a\u8868\u73fe\u70ba\u904e\u5ea6\u81a8\u8139\u7684\u5be6\u9ad4\u95dc\u4fc2\u5716\uff08ERD\uff09\u3002\u81a8\u8139\u7684ERD\u53ef\u80fd\u5c0e\u81f4\u6548\u80fd\u4e0b\u964d\u3001\u7dad\u8b77\u5669\u5922\uff0c\u4ee5\u53ca\u8cc7\u6599\u5b8c\u6574\u6027\u554f\u984c\u98a8\u96aa\u589e\u52a0\u3002<\/p>\n<p>\u91cd\u69cb\u9019\u4e9b\u5716\u8868\u4e26\u975e\u50c5\u50c5\u662f\u5916\u89c0\u4e0a\u7684\u4fee\u98fe\u3002\u9019\u662f\u4e00\u7a2e\u9700\u8981\u7cbe\u78ba\u5ea6\u7684\u7d50\u69cb\u6027\u5e72\u9810\u3002\u4e3b\u8981\u76ee\u6a19\u662f\u5728\u8f49\u63db\u904e\u7a0b\u4e2d\u78ba\u4fdd\u7d55\u5c0d\u6c92\u6709\u8cc7\u6599\u907a\u5931\u6216\u640d\u58de\u7684\u540c\u6642\uff0c\u7c21\u5316\u6a21\u5f0f\u3001\u63d0\u5347\u53ef\u8b80\u6027\u4e26\u512a\u5316\u67e5\u8a62\u6548\u80fd\u3002\u672c\u6307\u5357\u63d0\u4f9b\u4e86\u4e00\u7a2e\u7d50\u69cb\u5316\u7684\u65b9\u6cd5\u4f86\u7ba1\u7406\u6b64\u904e\u7a0b\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Whimsical infographic illustrating a step-by-step guide to refactoring overgrown Entity Relationship Diagrams without data loss, featuring a garden metaphor with tangled database vines transforming into an organized schema, highlighting preparation phases, normalization techniques (1NF-3NF), data integrity safeguards, common pitfalls with solutions, and post-refactoring validation checkpoints in a playful hand-drawn style.\" decoding=\"async\" src=\"https:\/\/www.viz-note.com\/wp-content\/uploads\/2026\/04\/whimsical-erd-refactoring-guide-infographic-16x9-1.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83d\udcc9 \u70ba\u4f55ERD\u6703\u8b8a\u5f97\u96e3\u4ee5\u7ba1\u7406<\/h2>\n<p>\u7406\u89e3\u6a21\u5f0f\u81a8\u8139\u7684\u6839\u672c\u539f\u56e0\uff0c\u662f\u89e3\u6c7a\u554f\u984c\u7684\u7b2c\u4e00\u6b65\u3002\u4e00\u500b\u5728\u7f3a\u4e4f\u6cbb\u7406\u7684\u60c5\u6cc1\u4e0b\u81ea\u7136\u6210\u9577\u7684ERD\uff0c\u901a\u5e38\u6703\u8868\u73fe\u51fa\u7279\u5b9a\u7684\u75c7\u72c0\u3002\u8b58\u5225\u9019\u4e9b\u6a21\u5f0f\uff0c\u624d\u80fd\u9032\u884c\u91dd\u5c0d\u6027\u7684\u5e72\u9810\u3002<\/p>\n<ul>\n<li><strong>\u91cd\u8907\u6b04\u4f4d\uff1a<\/strong>\u76f8\u540c\u7684\u8cc7\u6599\u9ede\u5132\u5b58\u5728\u591a\u500b\u8cc7\u6599\u8868\u4e2d\u3002\u9019\u6703\u9020\u6210\u540c\u6b65\u6311\u6230\uff0c\u56e0\u70ba\u66f4\u65b0\u4e00\u500b\u5be6\u4f8b\u4e0d\u6703\u540c\u6b65\u66f4\u65b0\u53e6\u4e00\u500b\u3002<\/li>\n<li><strong>\u53cd\u898f\u7bc4\u5316\u904e\u5ea6\u4f7f\u7528\uff1a<\/strong>\u96d6\u7136\u53cd\u898f\u7bc4\u5316\u80fd\u63d0\u5347\u8b80\u53d6\u901f\u5ea6\uff0c\u4f46\u904e\u5ea6\u4f7f\u7528\u6703\u4f7f\u5beb\u5165\u64cd\u4f5c\u8b8a\u5f97\u8907\u96dc\uff0c\u4e26\u589e\u52a0\u5132\u5b58\u958b\u92b7\u3002<\/li>\n<li><strong>\u5f31\u95dc\u4fc2\uff1a<\/strong> \u591a\u5c0d\u591a\u95dc\u4fc2\u901a\u5e38\u4f7f\u7528\u55ae\u4e00\u8cc7\u6599\u8868\u642d\u914d\u591a\u500b\u5916\u9375\u4f86\u5be6\u73fe\uff0c\u800c\u975e\u6b63\u78ba\u7684\u95dc\u806f\u8868\u3002<\/li>\n<li><strong>\u96b1\u542b\u7684\u696d\u52d9\u908f\u8f2f\uff1a<\/strong> \u8cc7\u6599\u985e\u578b\u548c\u7d04\u675f\u53ef\u80fd\u4f9d\u8cf4\u61c9\u7528\u5c64\u6aa2\u67e5\uff0c\u800c\u975e\u8cc7\u6599\u5eab\u5c64\u7684\u5f37\u5236\u57f7\u884c\uff0c\u4f7f\u6a21\u5f0f\u8b8a\u5f97\u8106\u5f31\u3002<\/li>\n<li><strong>\u5b64\u5152\u5be6\u9ad4\uff1a<\/strong> \u5b58\u5728\u4e00\u4e9b\u8cc7\u6599\u8868\u4e0d\u518d\u88ab\u4efb\u4f55\u6d3b\u8e8d\u7684\u61c9\u7528\u6a21\u7d44\u5f15\u7528\uff0c\u4f46\u4ecd\u4fdd\u7559\u5728\u7269\u7406\u5132\u5b58\u4e2d\u3002<\/li>\n<\/ul>\n<p>\u7576\u9019\u4e9b\u56e0\u7d20\u7d2f\u7a4d\u6642\uff0cERD\u4fbf\u8b8a\u6210\u4e00\u5f35\u932f\u7d9c\u8907\u96dc\u7684\u7db2\u3002\u95dc\u4fc2\u7684\u53ef\u8996\u5316\u8b8a\u5f97\u56f0\u96e3\uff0c\u4e14\u5728\u4efb\u4f55\u4fee\u6539\u904e\u7a0b\u4e2d\u5f15\u5165\u932f\u8aa4\u7684\u98a8\u96aa\u6703\u5448\u6307\u6578\u7d1a\u589e\u52a0\u3002<\/p>\n<h2>\ud83d\udee1\ufe0f \u70ba\u6a21\u5f0f\u8b8a\u66f4\u505a\u6e96\u5099<\/h2>\n<p>\u5728\u89f8\u78b0\u4efb\u4f55\u4e00\u884c\u7a0b\u5f0f\u78bc\uff08DDL\uff0c\u8cc7\u6599\u5b9a\u7fa9\u8a9e\u8a00\uff09\u4e4b\u524d\uff0c\u56b4\u683c\u7684\u6e96\u5099\u968e\u6bb5\u662f\u5fc5\u9808\u7684\u3002\u6b64\u968e\u6bb5\u53ef\u964d\u4f4e\u98a8\u96aa\uff0c\u4e26\u78ba\u4fdd\u5728\u51fa\u73fe\u554f\u984c\u6642\u4ecd\u53ef\u9032\u884c\u56de\u6efe\u3002<\/p>\n<h3>1. \u5168\u9762\u7684\u5099\u4efd\u7b56\u7565<\/h3>\n<p>\u8cc7\u6599\u5b89\u5168\u81f3\u95dc\u91cd\u8981\u3002\u5099\u4efd\u4e0d\u50c5\u50c5\u662f\u4e00\u500b\u6a94\u6848\uff1b\u5b83\u662f\u4e00\u500b\u9a57\u8b49\u9ede\u3002<\/p>\n<ul>\n<li><strong>\u908f\u8f2f\u5099\u4efd\uff1a<\/strong> \u4ee5\u4eba\u985e\u53ef\u8b80\u7684\u683c\u5f0f\uff08\u4f8b\u5982SQL\u8f49\u5132\uff09\u532f\u51fa\u6a21\u5f0f\u5b9a\u7fa9\u548c\u8cc7\u6599\u3002<\/li>\n<li><strong>\u7269\u7406\u5feb\u7167\uff1a<\/strong> \u5982\u679c\u5e73\u53f0\u652f\u63f4\uff0c\u8acb\u5efa\u7acb\u5132\u5b58\u9ad4\u7684\u6642\u9ede\u5feb\u7167\u3002<\/li>\n<li><strong>\u552f\u8b80\u8907\u672c\uff1a<\/strong> \u5982\u679c\u53ef\u80fd\uff0c\u555f\u52d5\u751f\u7522\u74b0\u5883\u7684\u8907\u672c\u3002\u9996\u5148\u5728\u6b64\u8655\u57f7\u884c\u6240\u6709\u6e2c\u8a66\u548c\u9077\u79fb\u8173\u672c\u3002<\/li>\n<\/ul>\n<h3>2. \u4f9d\u8cf4\u95dc\u4fc2\u6620\u5c04<\/h3>\n<p>\u8cc7\u6599\u8868\u4e26\u975e\u5b64\u7acb\u5b58\u5728\u3002\u6bcf\u500b\u5be6\u9ad4\u90fd\u53ef\u80fd\u88ab\u61c9\u7528\u7a0b\u5f0f\u78bc\u3001\u5132\u5b58\u7a0b\u5e8f\u6216\u5916\u90e8\u5831\u8868\u5de5\u5177\u6240\u5f15\u7528\u3002\u4f60\u5fc5\u9808\u8b58\u5225\u51fa\u8cc7\u6599\u7684\u6bcf\u4e00\u9805\u4f7f\u7528\u8005\u3002<\/p>\n<ul>\n<li>\u5be9\u67e5\u61c9\u7528\u7a0b\u5f0f\u78bc\u4e2d\u5c0d\u8cc7\u6599\u8868\u7684\u76f4\u63a5\u5f15\u7528\u3002<\/li>\n<li>\u6aa2\u67e5\u662f\u5426\u5b58\u5728\u4f9d\u8cf4\u7279\u5b9a\u6b04\u4f4d\u7684\u6aa2\u8996\u5716\u6216\u7269\u5316\u6aa2\u8996\u5716\u3002<\/li>\n<li>\u8b58\u5225\u4efb\u4f55\u6392\u5b9a\u7684\u5de5\u4f5c\u6216 ETL\uff08\u63d0\u53d6\u3001\u8f49\u63db\u3001\u8f09\u5165\uff09\u6d41\u7a0b\uff0c\u9019\u4e9b\u6d41\u7a0b\u6703\u5f9e\u53d7\u5f71\u97ff\u7684\u8cc7\u6599\u8868\u4e2d\u532f\u5165\u6216\u8f38\u51fa\u8cc7\u6599\u3002<\/li>\n<\/ul>\n<h3>3. \u5f71\u97ff\u5206\u6790<\/h3>\n<p>\u8a18\u9304\u76ee\u524d\u7684\u72c0\u614b\u3002\u5efa\u7acb\u8cc7\u6599\u5217\u6578\u3001\u8cc7\u6599\u5206\u5e03\u548c\u67e5\u8a62\u57f7\u884c\u6642\u9593\u7684\u57fa\u6e96\u3002\u6b64\u57fa\u6e96\u53ef\u8b93\u60a8\u6bd4\u8f03\u91cd\u69cb\u524d\u5f8c\u7684\u7cfb\u7d71\u72c0\u614b\uff0c\u4ee5\u78ba\u4fdd\u4e00\u81f4\u6027\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u6e05\u55ae\u9805\u76ee<\/th>\n<th>\u512a\u5148\u7d1a<\/th>\n<th>\u5099\u8a3b<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u9a57\u8b49\u5099\u4efd\u5b8c\u6574\u6027<\/td>\n<td>\u9ad8<\/td>\n<td>\u78ba\u4fdd\u6821\u9a57\u548c\u8207\u4f86\u6e90\u76f8\u7b26<\/td>\n<\/tr>\n<tr>\n<td>\u6620\u5c04\u6240\u6709\u5916\u9375<\/td>\n<td>\u9ad8<\/td>\n<td>\u8a18\u9304\u7236-\u5b50\u95dc\u4fc2<\/td>\n<\/tr>\n<tr>\n<td>\u8b58\u5225\u6d3b\u8e8d\u67e5\u8a62<\/td>\n<td>\u4e2d<\/td>\n<td>\u4f7f\u7528\u67e5\u8a62\u65e5\u8a8c\u627e\u51fa\u8ca0\u8f09\u8f03\u9ad8\u7684\u67e5\u8a62<\/td>\n<\/tr>\n<tr>\n<td>\u5be9\u67e5\u5b58\u53d6\u63a7\u5236<\/td>\n<td>\u4e2d<\/td>\n<td>\u78ba\u4fdd\u6b0a\u9650\u5728\u9077\u79fb\u5f8c\u4ecd\u80fd\u7dad\u6301<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83d\udd04 \u91cd\u69cb\u65b9\u6cd5\u8ad6<\/h2>\n<p>\u91cd\u69cb\u7684\u6838\u5fc3\u5728\u65bc\u91cd\u65b0\u7d44\u7e54\u908f\u8f2f\u6a21\u578b\u3002\u9019\u901a\u5e38\u900f\u904e\u6b63\u898f\u5316\u5be6\u73fe\uff0c\u4f46\u70ba\u4e86\u6027\u80fd\u8003\u91cf\uff0c\u4e5f\u53ef\u80fd\u4fdd\u7559\u7b56\u7565\u6027\u7684\u53cd\u6b63\u898f\u5316\u3002\u76ee\u6a19\u662f\u78ba\u4fdd\u6e05\u6670\u8207\u5b8c\u6574\u6027\u3002<\/p>\n<h3>1. \u5206\u6790\u76ee\u524d\u7684\u6b63\u898f\u5316\u7a0b\u5ea6<\/h3>\n<p>\u5927\u591a\u6578\u50b3\u7d71\u8cc7\u6599\u5eab\u7d50\u69cb\u90fd\u672a\u9054\u5230\u7b2c\u4e09\u6b63\u898f\u5316\u5f62\u5f0f\uff083NF\uff09\u3002\u671d\u5411\u66f4\u9ad8\u6b63\u898f\u5316\u7a0b\u5ea6\u767c\u5c55\u53ef\u6e1b\u5c11\u5197\u9918\u3002<\/p>\n<ul>\n<li><strong>\u7b2c\u4e00\u6b63\u898f\u5316\u5f62\u5f0f\uff081NF\uff09\uff1a<\/strong>\u78ba\u4fdd\u539f\u5b50\u6027\u3002\u55ae\u5143\u683c\u5167\u4e0d\u5f97\u6709\u91cd\u8907\u7fa4\u7d44\u6216\u591a\u503c\u5c6c\u6027\u3002<\/li>\n<li><strong>\u7b2c\u4e8c\u6b63\u898f\u5316\u5f62\u5f0f\uff082NF\uff09\uff1a<\/strong>\u79fb\u9664\u90e8\u5206\u4f9d\u8cf4\u3002\u78ba\u4fdd\u6bcf\u500b\u975e\u9375\u5c6c\u6027\u90fd\u5b8c\u5168\u4f9d\u8cf4\u65bc\u4e3b\u9375\u3002<\/li>\n<li><strong>\u7b2c\u4e09\u6b63\u898f\u5316\u5f62\u5f0f\uff083NF\uff09\uff1a<\/strong>\u79fb\u9664\u50b3\u905e\u4f9d\u8cf4\u3002\u975e\u9375\u5c6c\u6027\u61c9\u50c5\u4f9d\u8cf4\u65bc\u9375\uff0c\u800c\u4e0d\u61c9\u4f9d\u8cf4\u65bc\u5176\u4ed6\u975e\u9375\u5c6c\u6027\u3002<\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th>\u6b63\u898f\u5316\u5c64\u7d1a<\/th>\n<th>\u95dc\u9375\u898f\u5247<\/th>\n<th>\u512a\u52e2<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u7b2c\u4e00\u7bc4\u5f0f<\/td>\n<td>\u50c5\u9650\u539f\u5b50\u503c<\/td>\n<td>\u6d88\u9664\u8907\u96dc\u7684\u89e3\u6790\u908f\u8f2f<\/td>\n<\/tr>\n<tr>\n<td>\u7b2c\u4e8c\u7bc4\u5f0f<\/td>\n<td>\u5b8c\u5168\u4f9d\u8cf4\u65bc\u4e3b\u9375<\/td>\n<td>\u6e1b\u5c11\u66f4\u65b0\u7570\u5e38<\/td>\n<\/tr>\n<tr>\n<td>\u7b2c\u4e09\u7bc4\u5f0f<\/td>\n<td>\u7121\u50b3\u905e\u4f9d\u8cf4<\/td>\n<td>\u63d0\u5347\u8cc7\u6599\u4e00\u81f4\u6027<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>2. \u5206\u89e3\u5927\u578b\u5be6\u9ad4<\/h3>\n<p>\u7576\u55ae\u4e00\u8868\u683c\u5305\u542b\u592a\u591a\u6b04\u4f4d\u6642\uff0c\u901a\u5e38\u8868\u793a\u4e0d\u540c\u7684\u5546\u696d\u6982\u5ff5\u88ab\u6df7\u6dc6\u4e86\u3002\u61c9\u5c07\u5176\u62c6\u5206\u70ba\u7368\u7acb\u7684\u8868\u683c\u3002<\/p>\n<ul>\n<li>\u8b58\u5225\u63cf\u8ff0\u4e0d\u540c\u5be6\u9ad4\u7684\u6b04\u4f4d\u7fa4\u7d44\uff08\u4f8b\u5982\uff1a\u4f7f\u7528\u8005\u8cc7\u6599\u8207\u4f7f\u7528\u8005\u504f\u597d\uff09\u3002<\/li>\n<li>\u70ba\u8a72\u7368\u7279\u6982\u5ff5\u5efa\u7acb\u65b0\u7684\u8868\u683c\u3002<\/li>\n<li>\u5c07\u76f8\u95dc\u6b04\u4f4d\u79fb\u81f3\u65b0\u8868\u683c\u3002<\/li>\n<li>\u4f7f\u7528\u5916\u9375\u5efa\u7acb\u4e00\u5c0d\u4e00\u7684\u95dc\u4fc2\u3002<\/li>\n<\/ul>\n<h3>3. \u89e3\u6c7a\u591a\u5c0d\u591a\u95dc\u4fc2<\/h3>\n<p>\u76f4\u63a5\u4ee5\u6bcf\u500b\u8868\u683c\u4e2d\u7684\u4e00\u500b\u6b04\u4f4d\u9023\u7d50\u5169\u500b\u8868\u683c\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u53cd\u6a21\u5f0f\u3002\u9019\u61c9\u6539\u70ba\u4f7f\u7528\u6a4b\u63a5\u8868\u683c\u3002<\/p>\n<ul>\n<li>\u5efa\u7acb\u4e00\u500b\u65b0\u8868\u683c\u4f5c\u70ba\u6a4b\u63a5\u3002<\/li>\n<li>\u5c07\u5169\u500b\u7236\u8868\u683c\u7684\u4e3b\u9375\u4f5c\u70ba\u5916\u9375\u5305\u542b\u5728\u6a4b\u63a5\u8868\u683c\u4e2d\u3002<\/li>\n<li>\u52a0\u5165\u5c6c\u65bc\u95dc\u4fc2\u672c\u8eab\u7684\u4efb\u4f55\u7279\u5b9a\u5c6c\u6027\uff08\u4f8b\u5982\uff1a\u95dc\u4fc2\u5efa\u7acb\u7684\u65e5\u671f\uff09\u3002<\/li>\n<\/ul>\n<h3>4. \u8655\u7406\u6b77\u53f2\u8cc7\u6599<\/h3>\n<p>\u91cd\u69cb\u901a\u5e38\u6703\u6539\u8b8a\u8cc7\u6599\u7684\u5132\u5b58\u65b9\u5f0f\u3002\u6b77\u53f2\u8a18\u9304\u5fc5\u9808\u6e96\u78ba\u4fdd\u5b58\u3002<\/p>\n<ul>\n<li>\u4e0d\u8981\u50c5\u50c5\u522a\u9664\u820a\u8cc7\u6599\u3002\u5b83\u53ef\u80fd\u9700\u8981\u7528\u65bc\u5be9\u8a08\u8ffd\u8e64\u6216\u6cd5\u5f8b\u5408\u898f\u3002<\/li>\n<li>\u5728\u5207\u63db\u61c9\u7528\u7a0b\u5f0f\u9023\u63a5\u4e4b\u524d\uff0c\u4f7f\u7528\u9077\u79fb\u8173\u672c\u5c07\u73fe\u6709\u8cc7\u6599\u8f49\u63db\u70ba\u65b0\u683c\u5f0f\u3002<\/li>\n<li>\u5982\u679c\u820a\u8868\u683c\u4e0d\u518d\u9700\u8981\uff0c\u4f46\u5fc5\u9808\u4fdd\u7559\u4ee5\u4f9b\u8a18\u9304\uff0c\u5247\u61c9\u9032\u884c\u6b78\u6a94\u3002<\/li>\n<\/ul>\n<h2>\u2705 \u78ba\u4fdd\u8cc7\u6599\u5b8c\u6574\u6027<\/h2>\n<p>\u5728\u8f49\u63db\u904e\u7a0b\u4e2d\uff0c\u8cc7\u6599\u640d\u58de\u7684\u98a8\u96aa\u6700\u9ad8\u3002\u8cc7\u6599\u5b8c\u6574\u6027\u7d04\u675f\u662f\u60a8\u7684\u5b89\u5168\u7db2\u3002<\/p>\n<h3>1. \u5916\u9375\u7d04\u675f<\/h3>\n<p>\u5728\u8cc7\u6599\u5eab\u5c64\u7d1a\u5f37\u5236\u57f7\u884c\u53c3\u8003\u5b8c\u6574\u6027\u3002\u9019\u53ef\u9632\u6b62\u5b50\u8a18\u9304\u5f15\u7528\u5df2\u4e0d\u5b58\u5728\u7684\u7236\u8a18\u9304\u7684\u5b64\u5152\u8a18\u9304\u3002<\/p>\n<ul>\n<li>\u555f\u7528 <code>CASCADE<\/code>\u50c5\u5728\u908f\u8f2f\u4e0a\u5fc5\u8981\u6642\u624d\u66f4\u65b0\u6216\u522a\u9664\u3002<\/li>\n<li>\u4f7f\u7528 <code>RESTRICT<\/code> \u6216 <code>NO ACTION<\/code>\u4ee5\u963b\u6b62\u6703\u7834\u58de\u95dc\u4fc2\u7684\u8b8a\u66f4\u3002<\/li>\n<\/ul>\n<h3>2. \u4e8b\u52d9\u7ba1\u7406<\/h3>\n<p>\u5c07\u6240\u6709\u9077\u79fb\u6b65\u9a5f\u5305\u88dd\u5728\u4e8b\u52d9\u4e2d\u3002\u9019\u78ba\u4fdd\u6240\u6709\u8b8a\u66f4\u90fd\u6703\u88ab\u61c9\u7528\uff0c\u6216\u8005\u5b8c\u5168\u4e0d\u61c9\u7528\u3002\u90e8\u5206\u66f4\u65b0\u6703\u5c0e\u81f4\u72c0\u614b\u4e0d\u4e00\u81f4\u3002<\/p>\n<ul>\n<li>\u5728\u7b2c\u4e00\u500b DDL \u547d\u4ee4\u4e4b\u524d\u555f\u52d5\u4e8b\u52d9\u3002<\/li>\n<li>\u50c5\u5728\u6240\u6709\u9a57\u8b49\u6aa2\u67e5\u901a\u904e\u5f8c\u624d\u63d0\u4ea4\u3002<\/li>\n<li>\u5982\u679c\u767c\u751f\u932f\u8aa4\uff0c\u7acb\u5373\u56de\u6efe\u3002<\/li>\n<\/ul>\n<h3>3. \u6578\u64da\u9a57\u8b49\u8173\u672c<\/h3>\n<p>\u9077\u79fb\u5b8c\u6210\u5f8c\uff0c\u57f7\u884c\u8173\u672c\u4ee5\u9a57\u8b49\u6578\u64da\u3002<\/p>\n<ul>\n<li>\u6bd4\u8f03\u820a\u8868\u8207\u65b0\u8868\u4e4b\u9593\u7684\u8cc7\u6599\u5217\u6578\u3002<\/li>\n<li>\u5728\u95dc\u9375\u6b04\u4f4d\u4e0a\u8a08\u7b97\u6821\u9a57\u548c\uff0c\u4ee5\u78ba\u4fdd\u5b8c\u5168\u5339\u914d\u3002<\/li>\n<li>\u6aa2\u67e5\u539f\u672c\u4e0d\u53ef\u70ba\u7a7a\u7684\u6b04\u4f4d\u4e2d\u662f\u5426\u5b58\u5728\u7a7a\u503c\u3002<\/li>\n<li>\u78ba\u8a8d\u6240\u6709\u552f\u4e00\u6027\u7d04\u675f\u90fd\u5df2\u6eff\u8db3\u3002<\/li>\n<\/ul>\n<h2>\u26a0\ufe0f \u5e38\u898b\u9677\u9631\u8207\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u5373\u4f7f\u898f\u5283\u5468\u8a73\uff0c\u554f\u984c\u4ecd\u53ef\u80fd\u51fa\u73fe\u3002\u9810\u5148\u9810\u898b\u9019\u4e9b\u554f\u984c\u53ef\u6e1b\u5c11\u505c\u6a5f\u6642\u9593\u3002<\/p>\n<h3>1. \u300c\u62c6\u5206\u300d\u554f\u984c<\/h3>\n<p>\u62c6\u5206\u8868\u683c\u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u91cd\u8907\u9375\u3002\u5982\u679c\u6b63\u5728\u62c6\u5206\u8907\u5408\u9375\uff0c\u8acb\u78ba\u4fdd\u65b0\u9375\u5728\u65b0\u7d50\u69cb\u4e2d\u4ecd\u4fdd\u6301\u552f\u4e00\u6027\u3002<\/p>\n<ul>\n<li><strong>\u89e3\u6c7a\u65b9\u6848\uff1a<\/strong> \u4f7f\u7528\u66ab\u5b58\u8868\u4f86\u91cd\u65b0\u7d44\u7e54\u8cc7\u6599\uff0c\u518d\u5957\u7528\u65b0\u7d50\u69cb\u3002<\/li>\n<\/ul>\n<h3>2. \u7d22\u5f15\u6548\u80fd<\/h3>\n<p>\u65b0\u95dc\u4fc2\u9700\u8981\u65b0\u7684\u7d22\u5f15\u3002\u82e5\u7121\u7d22\u5f15\uff0c\u5c0d\u65b0\u95dc\u806f\u8868\u7684\u67e5\u8a62\u5c07\u6703\u5f88\u6162\u3002<\/p>\n<ul>\n<li><strong>\u89e3\u6c7a\u65b9\u6848\uff1a<\/strong> \u5728\u5efa\u7acb\u5f8c\u7acb\u5373\u70ba\u5916\u9375\u6b04\u4f4d\u5efa\u7acb\u7d22\u5f15\u3002\u4e0d\u8981\u50c5\u4f9d\u8cf4\u4e3b\u9375\u7d22\u5f15\u3002<\/li>\n<\/ul>\n<h3>3. \u61c9\u7528\u7a0b\u5f0f\u7a0b\u5f0f\u78bc\u4e0d\u5339\u914d<\/h3>\n<p>\u8cc7\u6599\u5eab\u767c\u751f\u8b8a\u66f4\uff0c\u4f46\u61c9\u7528\u7a0b\u5f0f\u7a0b\u5f0f\u78bc\u4e26\u672a\u7acb\u5373\u66f4\u65b0\u3002\u9019\u6703\u5c0e\u81f4\u57f7\u884c\u6642\u671f\u932f\u8aa4\u3002<\/p>\n<ul>\n<li><strong>\u89e3\u6c7a\u65b9\u6848\uff1a<\/strong>\u5728\u904e\u6e21\u671f\u9593\u5be6\u4f5c\u529f\u80fd\u65d7\u6a19\u6216\u96d9\u5beb\u5165\u7b56\u7565\u3002\u5141\u8a31\u820a\u7248\u8207\u65b0\u7248\u7d50\u69cb\u66ab\u6642\u5171\u5b58\u3002<\/li>\n<\/ul>\n<h3>4. \u8cc7\u6599\u985e\u578b\u4e0d\u5339\u914d<\/h3>\n<p>\u91cd\u69cb\u901a\u5e38\u6d89\u53ca\u8b8a\u66f4\u8cc7\u6599\u985e\u578b\uff08\u4f8b\u5982\uff0cVARCHAR \u8f49\u70ba INT\uff09\u3002\u5982\u679c\u8981\u8f49\u63db\u7684\u6b04\u4f4d\u5305\u542b\u975e\u6578\u503c\u5b57\u5143\uff0c\u9077\u79fb\u5c07\u5931\u6557\u3002<\/p>\n<ul>\n<li><strong>\u89e3\u6c7a\u65b9\u6848\uff1a<\/strong>\u5728\u9077\u79fb\u524d\u7684\u6b65\u9a5f\u4e2d\u6e05\u7406\u8cc7\u6599\u3002\u5efa\u7acb\u7121\u6548\u8cc7\u6599\u7684\u5831\u8868\u4ee5\u4f9b\u4eba\u5de5\u5be9\u6838\u3002<\/li>\n<\/ul>\n<h2>\ud83d\ude80 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