{"id":1644,"date":"2026-04-09T08:57:53","date_gmt":"2026-04-09T08:57:53","guid":{"rendered":"https:\/\/www.viz-note.com\/tw\/hidden-complexity-gap-junior-engineers-erd\/"},"modified":"2026-04-09T08:57:53","modified_gmt":"2026-04-09T08:57:53","slug":"hidden-complexity-gap-junior-engineers-erd","status":"publish","type":"post","link":"https:\/\/www.viz-note.com\/tw\/hidden-complexity-gap-junior-engineers-erd\/","title":{"rendered":"\u96b1\u85cf\u7684\u8907\u96dc\u6027\u5dee\u8ddd\uff1a\u7576\u521d\u7d1a\u5de5\u7a0b\u5e2b\u932f\u8aa4\u5730\u69cb\u5efa\u5be6\u9ad4\u95dc\u4fc2\u5716\u6642"},"content":{"rendered":"<p>\u8cc7\u6599\u5efa\u6a21\u901a\u5e38\u662f\u4efb\u4f55\u8edf\u9ad4\u61c9\u7528\u7a0b\u5f0f\u7684\u96b1\u6027\u9aa8\u5e79\u3002\u5118\u7ba1\u57f7\u884c\u696d\u52d9\u908f\u8f2f\u7684\u7a0b\u5f0f\u78bc\u53d7\u5230\u77da\u76ee\uff0c\u4f46\u5176\u5e95\u4e0b\u7684\u8cc7\u6599\u7d50\u69cb\u537b\u6c7a\u5b9a\u4e86\u6548\u80fd\u3001\u53ef\u64f4\u5c55\u6027\u8207\u53ef\u7dad\u8b77\u6027\u3002\u5c0d\u8a31\u591a\u521d\u7d1a\u5de5\u7a0b\u5e2b\u800c\u8a00\uff0c\u5be6\u9ad4\u95dc\u4fc2\u5716\uff08ERD\uff09\u53ea\u662f\u4e00\u9805\u7c21\u55ae\u7684\u7e6a\u5716\u7df4\u7fd2\uff0c\u53ea\u9700\u756b\u51fa\u65b9\u6846\u4e26\u9023\u63a5\u7dda\u689d\u3002\u7136\u800c\uff0c\u9019\u7a2e\u7c21\u55ae\u6027\u5177\u6709\u6b3a\u9a19\u6027\u3002\u4e00\u500b\u8a2d\u8a08\u4e0d\u826f\u7684ERD\u6703\u7522\u751f\u6301\u7e8c\u7d2f\u7a4d\u7684\u6280\u8853\u8ca0\u50b5\uff0c\u5c0e\u81f4\u8907\u96dc\u7684\u67e5\u8a62\u3001\u8cc7\u6599\u5b8c\u6574\u6027\u554f\u984c\uff0c\u4ee5\u53ca\u56f0\u96e3\u7684\u8cc7\u6599\u9077\u79fb\u3002<\/p>\n<p>\u672c\u6307\u5357\u63a2\u8a0e\u4e86\u96b1\u85cf\u7684\u8907\u96dc\u6027\u5dee\u8ddd\u3002\u5b83\u6307\u51fa\u7406\u8ad6\u77e5\u8b58\u8207\u5be6\u969b\u61c9\u7528\u4e4b\u9593\u812b\u7bc0\u7684\u6240\u5728\u3002\u900f\u904e\u7406\u89e3\u9019\u4e9b\u9677\u9631\uff0c\u958b\u767c\u8005\u80fd\u5920\u8d85\u8d8a\u57fa\u790e\u7684\u7e6a\u5716\u5de5\u4f5c\uff0c\u9081\u5411\u771f\u6b63\u7684\u67b6\u69cb\u601d\u7dad\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"A kawaii-style infographic explaining common Entity Relationship Diagram mistakes junior engineers make, featuring cute chibi characters, pastel colors, and visual examples of cardinality relationships, normalization tradeoffs, naming conventions, business logic considerations, and a validation checklist to help developers build scalable, maintainable database schemas.\" decoding=\"async\" src=\"https:\/\/www.viz-note.com\/wp-content\/uploads\/2026\/04\/kawaii-erd-complexity-gap-infographic.jpg\"\/><\/figure>\n<\/div>\n<h2>1. \u7406\u89e3\u8cc7\u6599\u5efa\u6a21\u7684\u57fa\u790e \ud83c\udfd7\ufe0f<\/h2>\n<p>\u5728\u6df1\u5165\u932f\u8aa4\u4e4b\u524d\uff0c\u5fc5\u9808\u5148\u91d0\u6e05ERD\u5be6\u969b\u4ee3\u8868\u7684\u610f\u7fa9\u3002\u5b83\u4e0d\u50c5\u50c5\u662f\u4e00\u5f35\u5716\u756b\uff0c\u66f4\u662f\u61c9\u7528\u7a0b\u5f0f\u8207\u5132\u5b58\u5c64\u4e4b\u9593\u7684\u5408\u7d04\u3002ERD\u7528\u4ee5\u5448\u73fe\u5be6\u9ad4\uff08\u8cc7\u6599\u8868\uff09\u3001\u5c6c\u6027\uff08\u6b04\u4f4d\uff09\u8207\u95dc\u4fc2\uff08\u5916\u9375\uff09\u3002<\/p>\n<p>\u7576\u5de5\u7a0b\u5e2b\u5c07ERD\u8996\u70ba\u4e00\u6b21\u5efa\u7acb\u5f8c\u4fbf\u88ab\u907a\u5fd8\u7684\u975c\u614b\u7522\u7269\u6642\uff0c\u4fbf\u932f\u5931\u4e86\u8cc7\u6599\u7684\u52d5\u614b\u672c\u8cea\u3002\u8cc7\u6599\u6a21\u578b\u6703\u96a8\u8457\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\u800c\u6f14\u9032\u3002\u521d\u7d1a\u5de5\u7a0b\u5e2b\u53ef\u80fd\u53ea\u5c08\u6ce8\u65bc\u7576\u4e0b\u7684\u529f\u80fd\uff0c\u4f8b\u5982\u5132\u5b58\u4f7f\u7528\u8005\u59d3\u540d\uff0c\u537b\u5ffd\u7565\u4e86\u8a72\u4f7f\u7528\u8005\u8207\u5176\u4ed6\u5be6\u9ad4\uff08\u5982\u8a02\u55ae\u3001\u8a02\u95b1\u6216\u65e5\u8a8c\uff09\u4e4b\u9593\u7684\u4e92\u52d5\u95dc\u4fc2\u3002<\/p>\n<ul>\n<li><strong>\u5be6\u9ad4\uff1a<\/strong> \u9019\u4e9b\u4ee3\u8868\u73fe\u5be6\u4e16\u754c\u4e2d\u7684\u7269\u4ef6\u6216\u6982\u5ff5\uff08\u4f8b\u5982\uff1a\u9867\u5ba2\u3001\u7522\u54c1\u3001\u767c\u7968\uff09\u3002<\/li>\n<li><strong> \u5c6c\u6027\uff1a<\/strong> \u9019\u4e9b\u662f\u5b9a\u7fa9\u5be6\u9ad4\u7684\u5c6c\u6027\uff08\u4f8b\u5982\uff1a\u96fb\u5b50\u90f5\u4ef6\u3001\u50f9\u683c\u3001\u65e5\u671f\uff09\u3002<\/li>\n<li><strong> \u95dc\u4fc2\uff1a<\/strong> \u9019\u4e9b\u5b9a\u7fa9\u4e86\u5be6\u9ad4\u4e4b\u9593\u7684\u4e92\u52d5\u65b9\u5f0f\uff08\u4f8b\u5982\uff1a\u4e00\u5c0d\u591a\u3001\u591a\u5c0d\u591a\uff09\u3002<\/li>\n<\/ul>\n<p>\u4e00\u500b\u7a69\u5065\u7684\u6a21\u578b\u61c9\u8003\u616e\u672a\u4f86\u7684\u6210\u9577\u3002\u5b83\u9700\u9810\u898b\u300c\u9867\u5ba2\u300d\u53ef\u80fd\u8f49\u8b8a\u70ba\u300c\u4f7f\u7528\u8005\u300d\uff0c\u6216\u300c\u7522\u54c1\u300d\u53ef\u80fd\u9700\u8981\u591a\u7a2e\u8b8a\u9ad4\u3002\u6700\u521d\u7684\u5716\u793a\u61c9\u5177\u5099\u8db3\u5920\u7684\u5f48\u6027\uff0c\u4ee5\u5bb9\u7d0d\u9019\u4e9b\u8b8a\u66f4\uff0c\u800c\u7121\u9700\u5b8c\u5168\u91cd\u69cb\u3002<\/p>\n<h2>2. \u57fa\u6578\u9677\u9631\uff1a\u8aa4\u89e3\u95dc\u4fc2 \ud83d\udd04<\/h2>\n<p>\u57fa\u6578\u662f\u8cc7\u6599\u5eab\u8a2d\u8a08\u4e2d\u7d50\u69cb\u6027\u5931\u6557\u7684\u6700\u5e38\u898b\u4f86\u6e90\u3002\u5b83\u5b9a\u7fa9\u4e86\u5be6\u9ad4\u5be6\u4f8b\u4e4b\u9593\u7684\u6578\u503c\u95dc\u4fc2\u3002\u8aa4\u89e3\u57fa\u6578\u6703\u5c0e\u81f4\u5132\u5b58\u6548\u7387\u4f4e\u4e0b\u8207\u8907\u96dc\u7684\u9023\u63a5\u908f\u8f2f\u3002<\/p>\n<h3>\u5e38\u898b\u7684\u57fa\u6578\u60c5\u5883<\/h3>\n<p>\u5de5\u7a0b\u5e2b\u7d93\u5e38\u9ed8\u8a8d\u6700\u660e\u986f\u7684\u95dc\u4fc2\uff0c\u537b\u672a\u8003\u616e\u908a\u754c\u60c5\u6cc1\u3002\u8acb\u8003\u616e\u4ee5\u4e0b\u56e0\u5047\u8a2d\u932f\u8aa4\u800c\u5c0e\u81f4\u554f\u984c\u7684\u60c5\u5883\uff1a<\/p>\n<ul>\n<li><strong>\u4e00\u5c0d\u4e00\uff081:1\uff09\uff1a<\/strong> \u5e38\u88ab\u6feb\u7528\u3002\u82e5\u5169\u500b\u5be6\u9ad4\u5177\u67091:1\u95dc\u4fc2\uff0c\u901a\u5e38\u61c9\u5408\u4f75\u70ba\u55ae\u4e00\u8cc7\u6599\u8868\uff0c\u4ee5\u6e1b\u5c11\u9023\u63a5\u7684\u958b\u92b7\uff0c\u9664\u975e\u9700\u8981\u56b4\u683c\u7684\u5b89\u5168\u5206\u96e2\u3002<\/li>\n<li><strong>\u4e00\u5c0d\u591a\uff081:N\uff09\uff1a<\/strong> \u6700\u5e38\u898b\u7684\u95dc\u4fc2\u3002\u55ae\u4e00\u7684\u7236\u8a18\u9304\u8207\u591a\u500b\u5b50\u8a18\u9304\u76f8\u95dc\u806f\u3002\u5916\u9375\u5fc5\u9808\u4f4d\u65bc\u5b50\u7aef\u3002<\/li>\n<li><strong>\u591a\u5c0d\u591a\uff08M:N\uff09\uff1a<\/strong> \u9019\u6b63\u662f\u8907\u96dc\u6027\u5dee\u8ddd\u64f4\u5927\u7684\u5730\u65b9\u3002\u5728\u95dc\u4fc2\u6a21\u578b\u4e2d\uff0c\u82e5\u7121\u4e2d\u7e7c\u8cc7\u6599\u8868\uff0c\u76f4\u63a5\u7684M:N\u95dc\u4fc2\u5728\u7269\u7406\u4e0a\u662f\u4e0d\u53ef\u80fd\u5be6\u73fe\u7684\u3002<\/li>\n<\/ul>\n<h3>\u8868\u683c\uff1a\u57fa\u6578\u5be6\u4f5c\u932f\u8aa4<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u60c5\u5883<\/th>\n<th>\u932f\u8aa4\u505a\u6cd5<\/th>\n<th>\u6b63\u78ba\u505a\u6cd5<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u5b78\u751f\u8207\u8ab2\u7a0b<\/td>\n<td>\u5728\u300c\u5b78\u751f\u300d\u8cc7\u6599\u8868\u4e2d\u65b0\u589e\u300cCourseID\u300d\u6b04\u4f4d<\/td>\n<td>\u5efa\u7acb\u4e00\u500b\u300cStudent_Course\u300d\u4e2d\u7e7c\u8cc7\u6599\u8868<\/td>\n<\/tr>\n<tr>\n<td>\u8a02\u55ae\u8207\u7522\u54c1<\/td>\n<td>\u5c07\u7522\u54c1\u8a73\u7d30\u8cc7\u8a0a\u76f4\u63a5\u5d4c\u5165\u8a02\u55ae\u8868\u683c\u4e2d<\/td>\n<td>\u900f\u904e OrderItems \u8868\u683c\u9032\u884c\u9023\u7d50<\/td>\n<\/tr>\n<tr>\n<td>\u54e1\u5de5\u8207\u90e8\u9580<\/td>\n<td>\u5141\u8a31\u4e00\u540d\u54e1\u5de5\u5c6c\u65bc\u591a\u500b\u90e8\u9580\uff0c\u800c\u7121\u9700\u4f7f\u7528\u95dc\u806f\u8868\u683c<\/td>\n<td>\u5c07\u6620\u5c04\u95dc\u4fc2\u5206\u96e2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u7576\u5de5\u7a0b\u5e2b\u8a66\u5716\u900f\u904e\u91cd\u8907\u8cc7\u6599\uff0c\u5c07\u591a\u5c0d\u591a\u95dc\u4fc2\u5f37\u5236\u585e\u5165\u55ae\u4e00\u8868\u683c\u6642\uff0c\u6703\u5f15\u5165\u5197\u9918\u3002\u82e5\u7522\u54c1\u50f9\u683c\u8b8a\u66f4\uff0c\u5247\u5fc5\u9808\u5728\u6bcf\u500b\u51fa\u73fe\u8a72\u7522\u54c1\u7684\u8a02\u55ae\u8a18\u9304\u4e2d\u9032\u884c\u66f4\u65b0\u3002\u9019\u9055\u53cd\u4e86\u8cc7\u6599\u6b63\u898f\u5316\u7684\u539f\u5247\uff0c\u4e26\u9020\u6210\u7dad\u8b77\u4e0a\u7684\u5669\u5922\u3002<\/p>\n<h2>3. \u6b63\u898f\u5316\u8ff7\u601d\u8207\u73fe\u5be6\u6aa2\u9a57 \ud83d\udcc9<\/h2>\n<p>\u6b63\u898f\u5316\u662f\u5b78\u8853\u74b0\u5883\u4e2d\u6559\u6388\u7684\u6a19\u6e96\u6982\u5ff5\u3002\u5176\u76ee\u6a19\u662f\u6e1b\u5c11\u8cc7\u6599\u5197\u9918\u4e26\u63d0\u5347\u5b8c\u6574\u6027\u3002\u7136\u800c\uff0c\u8cc7\u6dfa\u5de5\u7a0b\u5e2b\u7d93\u5e38\u904e\u5ea6\u6b63\u898f\u5316\uff08\u9ad8\u9054\u7b2c\u4e94\u6b63\u898f\u5316\u5f62\u5f0f\uff09\uff0c\u537b\u672a\u8003\u616e\u6027\u80fd\u4e0a\u7684\u53d6\u6368\u3002<\/p>\n<h3>\u904e\u5ea6\u6b63\u898f\u5316\u7684\u9677\u9631<\/h3>\n<p>\u904e\u5ea6\u6b63\u898f\u5316\u7684\u8cc7\u6599\u7d50\u69cb\u6703\u5c07\u8cc7\u6599\u62c6\u5206\u5230\u904e\u591a\u7684\u8868\u683c\u4e2d\u3002\u96d6\u7136\u9019\u80fd\u78ba\u4fdd\u4e00\u81f4\u6027\uff0c\u537b\u8feb\u4f7f\u61c9\u7528\u7a0b\u5f0f\u57f7\u884c\u904e\u591a\u7684\u9023\u63a5\u64cd\u4f5c\u3002\u6bcf\u6b21\u9023\u63a5\u90fd\u6703\u589e\u52a0\u8a08\u7b97\u6210\u672c\u3002\u5728\u9ad8\u6d41\u91cf\u7cfb\u7d71\u4e2d\uff0c\u9019\u53ef\u80fd\u6210\u70ba\u74f6\u9838\u3002<\/p>\n<ul>\n<li><strong>1NF\uff08\u7b2c\u4e00\u6b63\u898f\u5316\u5f62\u5f0f\uff09\uff1a<\/strong>\u539f\u5b50\u503c\u3002\u55ae\u5143\u683c\u4e2d\u4e0d\u5f97\u5305\u542b\u6e05\u55ae\u3002<\/li>\n<li><strong>2NF\uff08\u7b2c\u4e8c\u6b63\u898f\u5316\u5f62\u5f0f\uff09\uff1a<\/strong>\u7121\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>3NF\uff08\u7b2c\u4e09\u6b63\u898f\u5316\u5f62\u5f0f\uff09\uff1a<\/strong>\u7121\u50b3\u905e\u4f9d\u8cf4\u3002\u5c6c\u6027\u4e0d\u61c9\u4f9d\u8cf4\u65bc\u5176\u4ed6\u975e\u9375\u5c6c\u6027\u3002<\/li>\n<\/ul>\n<p>\u4e00\u500b\u5e38\u898b\u7684\u932f\u8aa4\u662f\u5047\u8a2d 3NF \u59cb\u7d42\u662f\u76ee\u6a19\u3002\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53cd\u6b63\u898f\u5316\u662f\u4e00\u7a2e\u523b\u610f\u7684\u8a2d\u8a08\u9078\u64c7\u3002\u4f8b\u5982\uff0c\u5c07\u300c\u8a02\u55ae\u7e3d\u91d1\u984d\u300d\u76f4\u63a5\u5132\u5b58\u5728\u8a02\u55ae\u8868\u683c\u4e2d\uff0c\u53ef\u907f\u514d\u6bcf\u6b21\u986f\u793a\u8a02\u55ae\u6642\u90fd\u91cd\u65b0\u8a08\u7b97\u9805\u76ee\u7e3d\u548c\u3002\u9019\u662f\u4ee5\u5beb\u5165\u6027\u80fd\u63db\u53d6\u8b80\u53d6\u6027\u80fd\u3002<\/p>\n<h3>\u8868\u683c\uff1a\u6b63\u898f\u5316 vs. \u53cd\u6b63\u898f\u5316<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u56e0\u7d20<\/th>\n<th>\u6b63\u898f\u5316\uff083NF\uff09<\/th>\n<th>\u53cd\u6b63\u898f\u5316<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u8cc7\u6599\u5197\u9918<\/td>\n<td>\u4f4e<\/td>\n<td>\u9ad8<\/td>\n<\/tr>\n<tr>\n<td>\u5beb\u5165\u901f\u5ea6<\/td>\n<td>\u5feb\u901f<\/td>\n<td>\u8f03\u6162<\/td>\n<\/tr>\n<tr>\n<td>\u8b80\u53d6\u901f\u5ea6<\/td>\n<td>\u8f03\u6162\uff08\u66f4\u591a\u9023\u63a5\uff09<\/td>\n<td>\u5feb\u901f<\/td>\n<\/tr>\n<tr>\n<td>\u8cc7\u6599\u5b8c\u6574\u6027<\/td>\n<td>\u9ad8<\/td>\n<td>\u8f03\u4f4e\uff08\u9700\u8981\u908f\u8f2f\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u662f\u5426\u53cd\u898f\u7bc4\u5316\u5fc5\u9808\u4ee5\u8cc7\u6599\u70ba\u5c0e\u5411\u3002\u9019\u4e0d\u61c9\u96a8\u610f\u767c\u751f\u3002\u5de5\u7a0b\u5e2b\u5728\u5408\u4f75\u8868\u683c\u4e4b\u524d\uff0c\u5fc5\u9808\u5206\u6790\u67e5\u8a62\u6548\u80fd\u3002\u82e5\u4e0d\u8003\u616e\u4e0a\u4e0b\u6587\u800c\u76f2\u76ee\u9075\u5faa\u898f\u7bc4\u5316\u898f\u5247\uff0c\u5c07\u5c0e\u81f4\u7cfb\u7d71\u96d6\u4e00\u81f4\u537b\u9072\u7de9\u3002<\/p>\n<h2>4. \u547d\u540d\u6163\u4f8b\u8207\u8a9e\u7fa9\u6e05\u6670\u5ea6 \ud83c\udff7\ufe0f<\/h2>\n<p>\u8cc7\u6599\u5eab\u7684\u7d50\u69cb\u540d\u7a31\u662f\u5176\u8a5e\u5f59\u3002\u82e5\u8a5e\u5f59\u542b\u7cca\u4e0d\u6e05\uff0c\u7cfb\u7d71\u5c0d\u672a\u4f86\u958b\u767c\u8005\u800c\u8a00\u5c07\u8b8a\u5f97\u96e3\u4ee5\u7406\u89e3\u3002\u9019\u662f\u4e00\u7a2e\u5e38\u898b\u554f\u984c\uff0c\u6280\u8853\u7cbe\u78ba\u6027\u88ab\u72a7\u7272\u4ee5\u63db\u53d6\u7c21\u6f54\u3002<\/p>\n<p>\u4e00\u500b\u547d\u540d\u70ba<code>\u72c0\u614b<\/code>\u662f\u5371\u96aa\u7684\u3002\u5b83\u4ee3\u8868\u4ec0\u9ebc\u610f\u601d\uff1f\u662f\u6d3b\u8e8d\u5e33\u6236\u55ce\uff1f\u5f85\u8655\u7406\u7684\u4ed8\u6b3e\u55ce\uff1f\u9084\u662f\u5df2\u522a\u9664\u7684\u8a18\u9304\uff1f\u82e5\u7f3a\u4e4f\u4e0a\u4e0b\u6587\uff0c\u5176\u610f\u7fa9\u4fbf\u6703\u55aa\u5931\u3002\u540c\u6a23\u5730\uff0c\u4f7f\u7528\u8907\u6578\u540d\u7a31\u4f5c\u70ba\u8868\u683c\u540d\u7a31\uff08\u4f8b\u5982<code>\u4f7f\u7528\u8005<\/code>\uff09\u8207\u55ae\u6578\u540d\u7a31\uff08\u4f8b\u5982<code>\u4f7f\u7528\u8005<\/code>\uff09\u6703\u9020\u6210\u4e0d\u4e00\u81f4\u3002<\/p>\n<ul>\n<li><strong>\u4e00\u81f4\u6027\uff1a<\/strong> \u82e5\u4e00\u500b\u8868\u683c\u4f7f\u7528<code>\u86c7\u5f62\u547d\u540d\u6cd5<\/code>\uff0c\u6240\u6709\u8868\u683c\u90fd\u5fc5\u9808\u4f7f\u7528<code>\u86c7\u5f62\u547d\u540d\u6cd5<\/code>.<\/li>\n<li><strong>\u63cf\u8ff0\u6027\uff1a<\/strong> \u4f7f\u7528\u80fd\u63cf\u8ff0\u8cc7\u6599\u5167\u5bb9\u7684\u540d\u7a31\uff0c\u800c\u975e\u50c5\u50c5\u63cf\u8ff0\u683c\u5f0f\u3002\u907f\u514d\u4f7f\u7528\u5982<code>\u8868\u683c1<\/code>\u6216<code>\u8cc7\u6599<\/code>.<\/li>\n<li><strong>\u4e0a\u4e0b\u6587\uff1a<\/strong> \u82e5\u5b58\u5728\u6b67\u7fa9\uff0c\u61c9\u5728\u95dc\u806f\u9375\u4e2d\u5305\u542b\u5be6\u9ad4\u540d\u7a31\u3002\u4f7f\u7528<code>\u4f7f\u7528\u8005ID<\/code>\u800c\u975e\u50c5\u50c5\u4f7f\u7528<code>id<\/code> \u5728\u53ef\u80fd\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<\/ul>\n<p>\u8003\u616e\u4e00\u500b\u5177\u6709\u591a\u7a2e\u985e\u578b\u4f7f\u7528\u8005\u7684\u7cfb\u7d71\uff1a\u7ba1\u7406\u54e1\u3001\u5ba2\u6236\u548c\u4f9b\u61c9\u5546\u3002\u4e00\u500b\u547d\u540d\u70ba<code>Users<\/code>\u7684\u55ae\u4e00\u8cc7\u6599\u8868\u53ef\u80fd\u5305\u542b\u4e00\u500b<code>role<\/code>\u6b04\u4f4d\u3002\u9019\u662f\u4e00\u500b\u300c\u795e\u8868\u300d\u3002\u66f4\u597d\u7684\u505a\u6cd5\u662f\u4f7f\u7528\u7368\u7acb\u7684\u8cc7\u6599\u8868\u6216\u660e\u78ba\u7684\u7e7c\u627f\u7b56\u7565\u3002\u7576\u4e0d\u540c\u89d2\u8272\u7684\u6b0a\u9650\u8207\u8cc7\u6599\u5b58\u53d6\u898f\u5247\u6709\u986f\u8457\u5dee\u7570\u6642\uff0c\u9019\u7a2e\u5340\u5225\u8b8a\u5f97\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h2>5. \u5728\u6280\u8853\u8a2d\u8a08\u4e2d\u5ffd\u7565\u5546\u696d\u908f\u8f2f \ud83e\udde0<\/h2>\n<p>\u521d\u7d1a\u8207\u8cc7\u6df1\u5de5\u7a0b\u5e2b\u4e4b\u9593\u6700\u5927\u7684\u5dee\u8ddd\u5728\u65bc\u5c0d\u5546\u696d\u908f\u8f2f\u7684\u7406\u89e3\u3002\u521d\u7d1a\u5de5\u7a0b\u5e2b\u53ef\u80fd\u5efa\u7acb\u4e00\u500b\u5b8c\u5168\u7b26\u5408\u76ee\u524d\u7a0b\u5f0f\u78bc\u9700\u6c42\u7684\u8cc7\u6599\u7d50\u69cb\uff0c\u4f46\u7576\u5546\u696d\u898f\u5247\u6539\u8b8a\u6642\uff0c\u5c31\u6703\u5931\u6548\u3002<\/p>\n<h3>\u300c\u8edf\u522a\u9664\u300d\u7684\u8aa4\u89e3<\/h3>\n<p>\u8a31\u591a\u958b\u767c\u4eba\u54e1\u53ea\u662f\u7c21\u55ae\u5730\u5728\u8cc7\u6599\u8868\u4e2d\u65b0\u589e\u4e00\u500b<code>deleted_at<\/code>\u6b04\u4f4d\u3002\u9019\u5728\u7c21\u55ae\u60c5\u6cc1\u4e0b\u53ef\u884c\u3002\u7136\u800c\uff0c\u5982\u679c\u4f7f\u7528\u8005\u88ab\u522a\u9664\uff0c\u5176\u76f8\u95dc\u65e5\u8a8c\u662f\u5426\u4e5f\u61c9\u88ab\u522a\u9664\uff1f\u5176\u8ca1\u52d9\u7d00\u9304\u662f\u5426\u61c9\u4fdd\u7559\u4ee5\u7b26\u5408\u5be9\u8a08\u5408\u898f\u6027\uff1fERD \u61c9\u900f\u904e\u7d04\u675f\u548c\u89f8\u767c\u5668\u53cd\u6620\u9019\u4e9b\u9650\u5236\uff0c\u800c\u4e0d\u50c5\u50c5\u4f9d\u8cf4\u61c9\u7528\u7a0b\u5f0f\u7a0b\u5f0f\u78bc\u3002<\/p>\n<h3>\u300cNull\u300d\u7684\u554f\u984c<\/h3>\n<p>\u5141\u8a31 NULL \u503c\u901a\u5e38\u6703\u5e36\u4f86\u96b1\u85cf\u7684\u8907\u96dc\u6027\u3002\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0cNULL \u5728\u8a9e\u7fa9\u4e0a\u8207\u7a7a\u5b57\u4e32\u6216\u96f6\u4e0d\u540c\u3002\u5982\u679c\u6b04\u4f4d\u662f\u53ef\u9078\u7684\uff0cERD \u61c9\u660e\u78ba\u6a19\u793a\u3002\u7136\u800c\uff0c\u4e0d\u9f13\u52f5\u5c07 NULL \u7528\u65bc\u908f\u8f2f\u63a7\u5236\u3002<\/p>\n<ul>\n<li><strong>\u53c3\u8003\u5b8c\u6574\u6027\uff1a<\/strong>\u5916\u9375\u7406\u60f3\u4e0a\u4e0d\u61c9\u70ba NULL\uff0c\u9664\u975e\u95dc\u4fc2\u78ba\u5be6\u662f\u53ef\u9078\u7684\u3002<\/li>\n<li><strong>\u8a08\u7b97\uff1a<\/strong>NULL \u503c\u6703\u5728\u8a08\u7b97\u4e2d\u50b3\u64ad\uff0c\u5c0e\u81f4\u7d50\u679c\u70ba NULL\u3002\u9019\u53ef\u80fd\u5c0e\u81f4\u805a\u5408\u67e5\u8a62\u5931\u6548\u3002<\/li>\n<li><strong>\u7d22\u5f15\uff1a<\/strong>\u4e0d\u540c\u8cc7\u6599\u5eab\u5f15\u64ce\u5c0d\u7d22\u5f15\u4e2d NULL \u503c\u7684\u8655\u7406\u65b9\u5f0f\u4e0d\u540c\uff0c\u53ef\u80fd\u5f71\u97ff\u67e5\u8a62\u6548\u80fd\u3002<\/li>\n<\/ul>\n<h2>6. \u826f\u597d\u8a2d\u8a08\u7f3a\u5931\u6240\u5e36\u4f86\u7684\u7dad\u8b77\u8ca0\u64d4 \ud83d\udd27<\/h2>\n<p>\u6280\u8853\u50b5\u4e0d\u50c5\u50c5\u662f\u7a0b\u5f0f\u78bc\u57f7\u884c\u7de9\u6162\u7684\u554f\u984c\uff0c\u66f4\u5728\u65bc\u7d50\u69cb\u4e0a\u7684\u50f5\u5316\u3002\u8a2d\u8a08\u4e0d\u826f\u7684 ERD \u6703\u8b93\u8b8a\u66f4\u8b8a\u5f97\u75db\u82e6\u3002\u7576\u51fa\u73fe\u65b0\u9700\u6c42\uff0c\u4f8b\u5982\u65b0\u589e\u4e00\u500b\u8207\u300c\u904b\u9001\u5730\u5740\u300d\u5206\u96e2\u7684\u300c\u5e33\u55ae\u5730\u5740\u300d\u6642\uff0c\u5de5\u7a0b\u5e2b\u5fc5\u9808\u8a55\u4f30\u73fe\u6709\u8cc7\u6599\u7d50\u69cb\u662f\u5426\u652f\u63f4\u6b64\u9700\u6c42\u3002<\/p>\n<h3>\u9077\u79fb\u5669\u5922<\/h3>\n<p>\u66f4\u6539\u64c1\u6709\u6578\u767e\u842c\u7b46\u8a18\u9304\u7684\u751f\u7522\u8cc7\u6599\u5eab\u7d50\u69cb\u9700\u8981\u8b39\u614e\u898f\u5283\u3002\u5982\u679c ERD \u5728\u8a2d\u8a08\u6642\u672a\u8003\u616e\u9077\u79fb\uff0c\u4fee\u6539\u6b04\u4f4d\u985e\u578b\u6216\u62c6\u5206\u8cc7\u6599\u8868\u53ef\u80fd\u5c0e\u81f4\u7cfb\u7d71\u9396\u5b9a\u6578\u5c0f\u6642\u3002\u9019\u7a2e\u505c\u6a5f\u6642\u9593\u6703\u5f71\u97ff\u6536\u5165\u8207\u4f7f\u7528\u8005\u4fe1\u4efb\u3002<\/p>\n<p>\u964d\u4f4e\u6b64\u98a8\u96aa\u7684\u7b56\u7565\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u8cc7\u6599\u7d50\u69cb\u7684\u7248\u672c\u63a7\u5236\uff1a<\/strong>\u5c07\u8cc7\u6599\u5eab\u7d50\u69cb\u8996\u70ba\u61c9\u7528\u7a0b\u5f0f\u7a0b\u5f0f\u78bc\u4e00\u6a23\u5c0d\u5f85\u3002<\/li>\n<li><strong>\u5411\u5f8c\u76f8\u5bb9\u6027\uff1a<\/strong>\u5728\u79fb\u9664\u6b04\u4f4d\u4e4b\u524d\u5148\u65b0\u589e\u6b04\u4f4d\u3002\u5728\u9077\u79fb\u5b8c\u6210\u524d\uff0c\u4fdd\u7559\u820a\u7684\u6b04\u4f4d\u3002<\/li>\n<li><strong>\u6587\u4ef6\u8aaa\u660e\uff1a<\/strong> ERD \u61c9\u70ba\u552f\u4e00\u771f\u5be6\u4f86\u6e90\u3002\u82e5\u5176\u8207\u8cc7\u6599\u5eab\u4e0d\u7b26\uff0c\u5247\u662f\u8cc7\u6599\u5eab\u6709\u8aa4\u3002<\/li>\n<\/ul>\n<h2>7. ERD \u9a57\u8b49\u5be6\u52d9\u6aa2\u67e5\u6e05\u55ae \u2705<\/h2>\n<p>\u70ba\u78ba\u4fdd\u8a2d\u8a08\u7a69\u5065\uff0c\u5de5\u7a0b\u5e2b\u5728\u5b9a\u7a3f\u5716\u793a\u524d\u61c9\u57f7\u884c\u9a57\u8b49\u6aa2\u67e5\u6e05\u55ae\u3002\u6b64\u904e\u7a0b\u53ef\u65bc\u5be6\u4f5c\u958b\u59cb\u524d\u767c\u73fe\u908f\u8f2f\u932f\u8aa4\u3002<\/p>\n<h3>\u5be6\u4f5c\u524d\u9a57\u8b49<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u6aa2\u67e5<\/th>\n<th>\u554f\u984c<\/th>\n<th>\u901a\u904e\u6a19\u6e96<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u4e3b\u8981\u9375<\/td>\n<td>\u6bcf\u500b\u8cc7\u6599\u8868\u662f\u5426\u90fd\u6709\u552f\u4e00\u7684\u8b58\u5225\u78bc\uff1f<\/td>\n<td>\u662f\uff0c\u4f7f\u7528\u81ea\u52d5\u905e\u589e\u6216 UUID<\/td>\n<\/tr>\n<tr>\n<td>\u5916\u4f86\u9375<\/td>\n<td>\u95dc\u4fc2\u662f\u5426\u660e\u78ba\u5b9a\u7fa9\uff1f<\/td>\n<td>\u662f\uff0c\u4e26\u8a2d\u5b9a ON DELETE\/UPDATE \u89c4\u5247<\/td>\n<\/tr>\n<tr>\n<td>\u91cd\u8907\u8cc7\u6599<\/td>\n<td>\u662f\u5426\u6709\u4efb\u4f55\u8cc7\u6599\u5132\u5b58\u5728\u591a\u500b\u4f4d\u7f6e\uff1f<\/td>\n<td>\u6c92\u6709\uff0c\u9664\u975e\u523b\u610f\u9032\u884c\u975e\u6b63\u898f\u5316<\/td>\n<\/tr>\n<tr>\n<td>\u53ef\u64f4\u5c55\u6027<\/td>\n<td>\u80fd\u5426\u8655\u7406\u76ee\u524d\u8cc7\u6599\u91cf\u7684 10 \u500d\uff1f<\/td>\n<td>\u5916\u4f86\u9375\u4e0a\u5b58\u5728\u7d22\u5f15<\/td>\n<\/tr>\n<tr>\n<td>\u53ef\u8b80\u6027<\/td>\n<td>\u65b0\u9032\u4eba\u54e1\u662f\u5426\u80fd\u5728 5 \u5206\u9418\u5167\u7406\u89e3\u6d41\u7a0b\uff1f<\/td>\n<td>\u660e\u78ba\u7684\u547d\u540d\u898f\u7bc4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>8. \u5de5\u5177\u8207\u6982\u5ff5 \ud83d\udee0\ufe0f<\/h2>\n<p>\u5f88\u5bb9\u6613\u4f9d\u8cf4\u7279\u5b9a\u5de5\u5177\u7684\u529f\u80fd\u4f86\u89e3\u6c7a\u8a2d\u8a08\u554f\u984c\u3002\u7136\u800c\uff0c\u5de5\u5177\u50c5\u70ba\u6b21\u8981\uff0c\u6838\u5fc3\u5728\u65bc\u6982\u5ff5\u672c\u8eab\u3002\u7121\u8ad6\u4f7f\u7528\u8996\u89ba\u5316\u5efa\u6a21\u5de5\u5177\u6216\u76f4\u63a5\u64b0\u5beb SQL \u6307\u4ee4\uff0c\u5176\u80cc\u5f8c\u908f\u8f2f\u59cb\u7d42\u4e00\u81f4\u3002<\/p>\n<p>\u90e8\u5206\u5de5\u7a0b\u5e2b\u6703\u5efa\u7acb\u8996\u89ba\u4e0a\u5b8c\u7f8e\u7121\u7455\uff0c\u4f46\u5728\u76ee\u6a19\u8cc7\u6599\u5eab\u4e2d\u8a9e\u6cd5\u4e0a\u4e0d\u53ef\u80fd\u7684\u5716\u793a\u3002\u4f8b\u5982\uff0c\u67d0\u4e9b\u5de5\u5177\u5141\u8a31\u5728\u8996\u89ba\u5c64\u9762\u51fa\u73fe\u5faa\u74b0\u4f9d\u8cf4\uff0c\u4f46\u8cc7\u6599\u5eab\u5f15\u64ce\u6703\u62d2\u7d55\u6b64\u985e\u7d50\u69cb\u3002\u91cd\u9ede\u61c9\u653e\u5728\u95dc\u806f\u5b8c\u6574\u6027\u898f\u5247\uff0c\u800c\u975e\u7e6a\u5716\u4ecb\u9762\u3002<\/p>\n<ul>\n<li><strong>\u8996\u89ba\u4e00\u81f4\u6027\uff1a<\/strong> \u4f7f\u7528\u6a19\u6e96\u7b26\u865f\u8868\u793a\u95dc\u4fc2\uff08\u70cf\u9d09\u8db3\u7b26\u865f\uff09\u3002<\/li>\n<li><strong>\u9a57\u8b49\uff1a<\/strong> \u5c07\u8cc7\u6599\u7d50\u69cb\u5c0d\u61c9\u81f3\u6e2c\u8a66\u8cc7\u6599\u5eab\uff0c\u4ee5\u9a57\u8b49\u7d04\u675f\u689d\u4ef6\u3002<\/li>\n<li><strong>\u5408\u4f5c\uff1a<\/strong> \u8207\u4e86\u89e3\u696d\u52d9\u9818\u57df\u7684\u76f8\u95dc\u4eba\u54e1\u4e00\u8d77\u5be9\u67e5\u5716\u8868\uff0c\u800c\u4e0d\u50c5\u50c5\u662f\u6280\u8853\u540c\u884c\u3002<\/li>\n<\/ul>\n<h2>9. \u73fe\u5be6\u4e16\u754c\u4e2d\u7684\u5931\u6557\u60c5\u5883 \u26a0\ufe0f<\/h2>\n<p>\u7406\u89e3\u62bd\u8c61\u6982\u5ff5\u662f\u4e00\u56de\u4e8b\uff1b\u770b\u5230\u5b83\u5011\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u5931\u6557\u53c8\u662f\u53e6\u4e00\u56de\u4e8b\u3002\u4ee5\u4e0b\u662f\u56e0\u4e0d\u826fERD\u8a2d\u8a08\u5c0e\u81f4\u5177\u9ad4\u554f\u984c\u7684\u5e38\u898b\u60c5\u5883\u3002<\/p>\n<h3>\u60c5\u5883 A\uff1a\u7121\u9650\u5faa\u74b0<\/h3>\n<p>\u958b\u767c\u4eba\u54e1\u5efa\u7acb\u4e86\u4e00\u500b\u95dc\u4fc2\uff0c\u4ecb\u65bc<code>\u4f7f\u7528\u8005<\/code>\u8207<code>\u5718\u968a<\/code>\u5176\u4e2d\u4f7f\u7528\u8005\u5c6c\u65bc\u67d0\u500b\u5718\u968a\uff0c\u800c\u5718\u968a\u7531\u4e00\u540d\u4f7f\u7528\u8005\u9818\u5c0e\u3002\u5982\u679c\u5916\u9375\u6307\u5411\u540c\u4e00\u5f35\u8868\u683c\u537b\u6c92\u6709\u660e\u78ba\u7684\u6839\u7bc0\u9ede\uff0c\u63d2\u5165\u6642\u6703\u7522\u751f\u5faa\u74b0\u5f15\u7528\u932f\u8aa4\u3002ERD \u5fc5\u9808\u660e\u78ba\u5340\u5206\u300c\u6210\u54e1\u300d\u8207\u300c\u9818\u5c0e\u8005\u300d\u7684\u95dc\u4fc2\u3002<\/p>\n<h3>\u60c5\u5883 B\uff1a\u975c\u9ed8\u7684\u8cc7\u6599\u907a\u5931<\/h3>\n<p>\u4e00\u500b<code>\u8a02\u55ae<\/code>\u8868\u683c\u53c3\u8003\u4e86<code>\u7522\u54c1<\/code>\u8868\u683c\u3002\u5176\u4e2d<code>ON DELETE<\/code>\u7d04\u675f\u8a2d\u5b9a\u70ba<code>CASCADE<\/code>\u3002\u7576\u7522\u54c1\u5f9e\u76ee\u9304\u4e2d\u79fb\u9664\u6642\uff0c\u6240\u6709\u76f8\u95dc\u7684\u8a02\u55ae\u90fd\u6703\u88ab\u522a\u9664\u3002\u9019\u6703\u7834\u58de\u6b77\u53f2\u92b7\u552e\u8cc7\u6599\u3002ERD \u61c9\u660e\u78ba\u5b9a\u7fa9\u53c3\u8003\u52d5\u4f5c\u70ba<code>RESTRICT<\/code>\u6216<code>SET NULL<\/code>\uff0c\u8996\u696d\u52d9\u9700\u6c42\u800c\u5b9a\u3002<\/p>\n<h3>\u60c5\u5883 C\uff1a\u641c\u5c0b\u7de9\u6162<\/h3>\n<p>\u5efa\u7acb\u4e86\u4e00\u5f35\u8868\u683c\uff0c\u5305\u542b\u4e00\u500b<code>\u540d\u7a31<\/code>\u6b04\u4f4d\u3002\u5de5\u7a0b\u5e2b\u7d93\u5e38\u67e5\u8a62\u6b64\u8868\u683c\u4ee5\u6839\u64da\u540d\u7a31\u5c0b\u627e\u4f7f\u7528\u8005\u3002\u82e5\u5728\u8a2d\u8a08\u968e\u6bb5\u672a\u5efa\u7acb\u7d22\u5f15\uff0c\u8cc7\u6599\u5eab\u5c07\u57f7\u884c\u5168\u8868\u6383\u63cf\u3002ERD \u61c9\u6a19\u793a\u51fa\u54ea\u4e9b\u6b04\u4f4d\u70ba\u641c\u5c0b\u983b\u7e41\u7684\u6b04\u4f4d\uff0c\u4e26\u9700\u5efa\u7acb\u7d22\u5f15\u3002<\/p>\n<h2>10. \u5f9e\u521d\u968e\u5230\u8cc7\u6df1\u601d\u7dad\u7684\u8f49\u8b8a \ud83d\ude80<\/h2>\n<p>\u9019\u500b\u8f49\u8b8a\u6d89\u53ca\u5c07\u95dc\u6ce8\u7126\u9ede\u5f9e\u300c\u5b83\u662f\u5426\u904b\u4f5c\uff1f\u300d\u8f49\u79fb\u5230\u300c\u5b83\u662f\u5426\u53ef\u64f4\u5c55\uff1f\u300d\u4ee5\u53ca\u300c\u662f\u5426\u6613\u65bc\u7dad\u8b77\uff1f\u300d\u3002<\/p>\n<ul>\n<li><strong>\u9810\u671f\uff1a<\/strong>\u6839\u64da\u7522\u696d\u8da8\u52e2\u9810\u6e2c\u672a\u4f86\u7684\u9700\u6c42\u3002<\/li>\n<li><strong>\u6e9d\u901a\uff1a<\/strong>\u5c07\u6280\u8853\u9650\u5236\u8f49\u5316\u70ba\u5546\u696d\u98a8\u96aa\u3002<\/li>\n<li><strong>\u5be9\u67e5\uff1a<\/strong>\u5207\u52ff\u5728\u672a\u7d93\u540c\u5115\u5be9\u67e5\u7684\u60c5\u6cc1\u4e0b\u5047\u8a2d\u5716\u8868\u662f\u6b63\u78ba\u7684\u3002<\/li>\n<\/ul>\n<p>\u8cc7\u6df1\u5de5\u7a0b\u5e2b\u7d93\u5e38\u7368\u7acb\u5de5\u4f5c\u3002\u8cc7\u6df1\u5de5\u7a0b\u5e2b\u5247\u6703\u5408\u4f5c\u3002ERD \u662f\u4e00\u7a2e\u6e9d\u901a\u5de5\u5177\uff0c\u80fd\u5f4c\u5408\u958b\u767c\u4eba\u54e1\u3001\u7522\u54c1\u7d93\u7406\u8207\u5229\u76ca\u76f8\u95dc\u8005\u4e4b\u9593\u7684\u5dee\u8ddd\u3002\u5982\u679c\u5716\u8868\u4ee4\u4eba\u56f0\u60d1\uff0c\u671f\u671b\u5c07\u6703\u7522\u751f\u8aa4\u89e3\u3002<\/p>\n<h2>\u95dc\u65bc\u8cc7\u6599\u5b8c\u6574\u6027\u7684\u6700\u5f8c\u60f3\u6cd5 \ud83c\udfaf<\/h2>\n<p>\u5efa\u7acb\u8cc7\u6599\u5eab\u7d50\u69cb\u4e0d\u662f\u4e00\u6b21\u6027\u7684\u4efb\u52d9\uff1b\u800c\u662f\u4e00\u9805\u6301\u7e8c\u7684\u5c08\u696d\u8981\u6c42\u3002\u8907\u96dc\u6027\u5dee\u8ddd\u7684\u5b58\u5728\u662f\u56e0\u70ba\u98a8\u96aa\u5f88\u9ad8\u3002\u61c9\u7528\u7a0b\u5f0f\u7a0b\u5f0f\u78bc\u4e2d\u7684\u932f\u8aa4\u53ef\u4ee5\u7acb\u5373\u4fee\u5fa9\u3002\u4f46\u8cc7\u6599\u6a21\u578b\u4e2d\u7684\u932f\u8aa4\u901a\u5e38\u9700\u8981\u8cc7\u6599\u9077\u79fb\u3001\u8cc7\u6599\u6e05\u7406\u4ee5\u53ca\u7cfb\u7d71\u505c\u6a5f\u3002<\/p>\n<p>\u900f\u904e\u9075\u5b88\u56b4\u683c\u7684\u5efa\u6a21\u539f\u5247\uff0c\u6df1\u5165\u7406\u89e3\u57fa\u6578\u95dc\u4fc2\uff0c\u4e26\u512a\u5148\u8003\u616e\u5546\u696d\u908f\u8f2f\u800c\u975e\u4fbf\u5229\u6027\uff0c\u5de5\u7a0b\u5e2b\u53ef\u4ee5\u5f4c\u88dc\u5dee\u8ddd\u3002\u76ee\u6a19\u4e0d\u662f\u5275\u9020\u5b8c\u7f8e\u7684\u5716\u8868\uff0c\u800c\u662f\u5efa\u7acb\u4e00\u500b\u80fd\u652f\u6301\u8edf\u9ad4\u6f14\u9032\u7684\u57fa\u790e\u3002\u8cc7\u6599\u662f\u61c9\u7528\u7a0b\u5f0f\u6700\u5177\u50f9\u503c\u7684\u8cc7\u7522\u3002\u4fdd\u8b77\u5176\u7d50\u69cb\u662f\u6bcf\u4e00\u4f4d\u53c3\u8207\u5efa\u69cb\u904e\u7a0b\u7684\u5de5\u7a0b\u5e2b\u7684\u8cac\u4efb\u3002<\/p>\n<p>\u82b1\u6642\u9593\u5be9\u67e5\u4f60\u7684\u5716\u8868\u3002\u8cea\u7591\u6bcf\u4e00\u500b\u95dc\u4fc2\u3002\u9a57\u8b49\u6bcf\u4e00\u9805\u7d04\u675f\u3002\u5728\u8a2d\u8a08\u968e\u6bb5\u6295\u5165\u7684\u6642\u9593\uff0c\u80fd\u70ba\u7dad\u8b77\u968e\u6bb5\u7bc0\u7701\u6578\u500b\u6708\u7684\u52aa\u529b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8cc7\u6599\u5efa\u6a21\u901a\u5e38\u662f\u4efb\u4f55\u8edf\u9ad4\u61c9\u7528\u7a0b\u5f0f\u7684\u96b1\u6027\u9aa8\u5e79\u3002\u5118\u7ba1\u57f7\u884c\u696d\u52d9\u908f\u8f2f\u7684&hellip;<\/p>\n","protected":false},"author":1,"featured_media":1645,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"\u521d\u968e\u5de5\u7a0b\u5e2b\u5e38\u72af\u7684ERD\u932f\u8aa4\uff1a\u5168\u9762\u6307\u5357","_yoast_wpseo_metadesc":"\u767c\u73fe\u5e38\u898b\u7684\u5be6\u9ad4\u95dc\u4fc2\u5716\u932f\u8aa4\u3002\u5b78\u7fd2\u57fa\u6578\u3001\u6b63\u898f\u5316\u8207\u8cc7\u6599\u5efa\u6a21\u7684\u9677\u9631\uff0c\u4ee5\u6539\u5584\u4f60\u7684\u8cc7\u6599\u5eab\u67b6\u69cb\u3002","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[68],"tags":[89,92],"class_list":["post-1644","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-database-design","tag-academic","tag-erd"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u521d\u968e\u5de5\u7a0b\u5e2b\u5e38\u72af\u7684ERD\u932f\u8aa4\uff1a\u5168\u9762\u6307\u5357<\/title>\n<meta name=\"description\" content=\"\u767c\u73fe\u5e38\u898b\u7684\u5be6\u9ad4\u95dc\u4fc2\u5716\u932f\u8aa4\u3002\u5b78\u7fd2\u57fa\u6578\u3001\u6b63\u898f\u5316\u8207\u8cc7\u6599\u5efa\u6a21\u7684\u9677\u9631\uff0c\u4ee5\u6539\u5584\u4f60\u7684\u8cc7\u6599\u5eab\u67b6\u69cb\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.viz-note.com\/tw\/hidden-complexity-gap-junior-engineers-erd\/\" \/>\n<meta property=\"og:locale\" content=\"zh_TW\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u521d\u968e\u5de5\u7a0b\u5e2b\u5e38\u72af\u7684ERD\u932f\u8aa4\uff1a\u5168\u9762\u6307\u5357\" \/>\n<meta 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