{"id":1671,"date":"2026-03-27T07:12:07","date_gmt":"2026-03-27T07:12:07","guid":{"rendered":"https:\/\/www.go-diagram.com\/cn\/self-referencing-entities-recursive-relationships-erd\/"},"modified":"2026-03-27T07:12:07","modified_gmt":"2026-03-27T07:12:07","slug":"self-referencing-entities-recursive-relationships-erd","status":"publish","type":"post","link":"https:\/\/www.go-diagram.com\/cn\/self-referencing-entities-recursive-relationships-erd\/","title":{"rendered":"ERD\u6307\u5357\uff1a\u81ea\u5f15\u7528\u5b9e\u4f53\uff1a\u7406\u89e3ERD\u4e2d\u7684\u9012\u5f52\u5173\u7cfb"},"content":{"rendered":"<p>\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u7684\u590d\u6742\u67b6\u6784\u4e2d\uff0c\u5f88\u5c11\u6709\u6982\u5ff5\u80fd\u50cf\u81ea\u5f15\u7528\u5b9e\u4f53\u4e00\u6837\u5bf9\u5de5\u7a0b\u5e08\u6784\u6210\u6311\u6218\u3002\u4e5f\u88ab\u79f0\u4e3a\u9012\u5f52\u5173\u7cfb\uff0c\u8fd9\u79cd\u6a21\u5f0f\u5141\u8bb8\u4e00\u4e2a\u8868\u94fe\u63a5\u5230\u81ea\u8eab\uff0c\u4ece\u800c\u5728\u6241\u5e73\u5316\u6a21\u5f0f\u4e2d\u5b9e\u73b0\u5bf9\u5c42\u6b21\u7ed3\u6784\u548c\u590d\u6742\u7ed3\u6784\u7684\u5efa\u6a21\u3002\u6b63\u786e\u7406\u89e3\u5982\u4f55\u5b9e\u73b0\u8fd9\u4e00\u5173\u7cfb\u5bf9\u4e8e\u7ef4\u62a4\u6570\u636e\u5b8c\u6574\u6027\u548c\u67e5\u8be2\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p>\u5728\u8bbe\u8ba1\u5b9e\u4f53\u5173\u7cfb\u56fe\uff08ERD\uff09\u65f6\uff0c\u5927\u591a\u6570\u5173\u7cfb\u8fde\u63a5\u7684\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u5b9e\u4f53\u3002\u7136\u800c\uff0c\u73b0\u5b9e\u4e16\u754c\u4e2d\u7684\u6570\u636e\u5e38\u5e38\u8981\u6c42\u4e00\u4e2a\u5b9e\u4f53\u4e0e\u81ea\u8eab\u7c7b\u578b\u76f8\u5173\u8054\u3002\u4f8b\u5982\uff0c\u7ecf\u7406\u7ba1\u7406\u5458\u5de5\uff0c\u7c7b\u522b\u5305\u542b\u5b50\u7c7b\u522b\uff0c\u4ea7\u54c1\u53ef\u4ee5\u662f\u5957\u4ef6\u7684\u4e00\u90e8\u5206\u3002\u8fd9\u4e9b\u573a\u666f\u90fd\u9700\u8981\u4f7f\u7528\u9012\u5f52\u5173\u7cfb\u3002<\/p>\n<p>\u672c\u6307\u5357\u63a2\u8ba8\u4e86\u5904\u7406\u81ea\u5f15\u7528\u5b9e\u4f53\u7684\u673a\u5236\u3001\u8bbe\u8ba1\u6a21\u5f0f\u548c\u6700\u4f73\u5b9e\u8df5\u3002\u6211\u4eec\u5c06\u7814\u7a76\u5982\u4f55\u5728\u4e0d\u4f9d\u8d56\u7279\u5b9a\u8f6f\u4ef6\u5de5\u5177\u7684\u60c5\u51b5\u4e0b\u6784\u5efa\u8fd9\u4e9b\u5173\u7cfb\uff0c\u91cd\u70b9\u805a\u7126\u4e8e\u901a\u7528\u7684\u6570\u636e\u5e93\u539f\u5219\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Chalkboard-style educational infographic explaining self-referencing entities and recursive relationships in Entity Relationship Diagrams (ERD), featuring hand-drawn employee hierarchy example with manager_id foreign key looping to employee_id primary key, visual use cases for organizational charts category trees bill of materials and comment threads, key implementation rules including nullable foreign keys indexing and cycle prevention, plus query method comparison between self-joins and recursive CTEs\" decoding=\"async\" src=\"https:\/\/www.go-diagram.com\/wp-content\/uploads\/2026\/03\/self-referencing-entities-erd-chalkboard-infographic.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83e\uddd0 \u4ec0\u4e48\u662f\u81ea\u5f15\u7528\u5b9e\u4f53\uff1f<\/h2>\n<p>\u5f53\u8868\u4e2d\u7684\u5916\u952e\u6307\u5411\u540c\u4e00\u5f20\u8868\u7684\u4e3b\u952e\u65f6\uff0c\u5c31\u4f1a\u53d1\u751f\u81ea\u5f15\u7528\u5b9e\u4f53\u3002\u8fd9\u5f62\u6210\u4e00\u4e2a\u5faa\u73af\uff0c\u4f7f\u5f97\u5355\u4e2a\u8868\u4e2d\u7684\u6570\u636e\u884c\u53ef\u4ee5\u5f15\u7528\u8be5\u8868\u4e2d\u7684\u5176\u4ed6\u884c\u3002\u8fd9\u662f\u5efa\u6a21\u5c42\u6b21\u6570\u636e\u7ed3\u6784\u7684\u57fa\u672c\u6280\u672f\u3002<\/p>\n<p><strong>\u5173\u952e\u7279\u5f81\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u5355\u8868\uff1a<\/strong> \u5173\u7cfb\u5b8c\u5168\u5b58\u5728\u4e8e\u4e00\u4e2a\u8868\u7ed3\u6784\u5185\u90e8\u3002<\/li>\n<li><strong> \u7236\u5b50\u5173\u8054\uff1a<\/strong> \u4e00\u884c\u4f5c\u4e3a\u7236\u7ea7\uff0c\u53e6\u4e00\u884c\u4f5c\u4e3a\u5b50\u7ea7\u3002<\/li>\n<li><strong> \u7a7a\u503c\u5904\u7406\uff1a<\/strong> \u5c42\u6b21\u7ed3\u6784\u7684\u6839\u8282\u70b9\u5728\u5916\u90e8\u952e\u5217\u4e2d\u901a\u5e38\u5177\u6709\u7a7a\u503c\u3002<\/li>\n<li><strong> \u5faa\u73af\u903b\u8f91\uff1a<\/strong> \u5728\u6570\u636e\u68c0\u7d22\u8fc7\u7a0b\u4e2d\u5fc5\u987b\u5c0f\u5fc3\uff0c\u4ee5\u9632\u6b62\u51fa\u73b0\u65e0\u9650\u5faa\u73af\u3002<\/li>\n<\/ul>\n<h2>\ud83c\udfd7\ufe0f \u9012\u5f52\u5173\u7cfb\u7684\u6838\u5fc3\u7ec4\u4ef6<\/h2>\n<p>\u4e3a\u4e86\u6709\u6548\u5b9e\u73b0\u8fd9\u79cd\u5173\u7cfb\uff0c\u5fc5\u987b\u534f\u8c03\u7279\u5b9a\u7684\u6570\u636e\u5e93\u7ec4\u4ef6\u3002\u6a21\u5f0f\u8bbe\u8ba1\u5728\u5f88\u5927\u7a0b\u5ea6\u4e0a\u4f9d\u8d56\u4e8e\u4e3b\u952e\u548c\u5916\u952e\u4e4b\u95f4\u7684\u4ea4\u4e92\u3002<\/p>\n<h3>\ud83d\udd11 \u4e3b\u952e<\/h3>\n<p>\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u90fd\u5fc5\u987b\u6709\u4e00\u4e2a\u552f\u4e00\u6807\u8bc6\u7b26\u3002\u8fd9\u662f\u951a\u70b9\u3002\u5f53\u4e00\u884c\u5f15\u7528\u53e6\u4e00\u884c\u65f6\uff0c\u5b83\u901a\u8fc7\u5b58\u50a8\u7236\u884c\u7684\u552f\u4e00\u6807\u8bc6\u7b26\u6765\u5b9e\u73b0\u3002<\/p>\n<ul>\n<li>\u5b83\u5fc5\u987b\u662f\u7a33\u5b9a\u7684\u3002\u66f4\u6539\u4e3b\u952e\u662f\u4e00\u9879\u590d\u6742\u64cd\u4f5c\u3002<\/li>\n<li>\u5e94\u5efa\u7acb\u7d22\u5f15\u4ee5\u5b9e\u73b0\u5feb\u901f\u67e5\u627e\u6027\u80fd\u3002<\/li>\n<li>\u901a\u5e38\uff0c\u8fd9\u662f\u4e00\u4e2a\u81ea\u589e\u6574\u6570\u6216UUID\u3002<\/li>\n<\/ul>\n<h3>\ud83d\udd17 \u5916\u952e<\/h3>\n<p>\u5916\u952e\u5217\u4e0e\u4e3b\u952e\u4f4d\u4e8e\u540c\u4e00\u5f20\u8868\u4e2d\u3002\u5b83\u5b58\u50a8\u7236\u884c\u4e3b\u952e\u7684\u503c\u3002\u8be5\u5217\u5b9a\u4e49\u4e86\u5173\u7cfb\u7684\u65b9\u5411\u3002<\/p>\n<ul>\n<li><strong>\u53ef\u4e3a\u7a7a\uff1a<\/strong> \u5728\u5c42\u6b21\u7ed3\u6784\u4e2d\uff0c\u9876\u7ea7\u9879\u76ee\uff08\u6839\u8282\u70b9\uff09\u6ca1\u6709\u7236\u8282\u70b9\u3002\u56e0\u6b64\uff0c\u8be5\u5217\u5fc5\u987b\u5141\u8bb8\u4e3a\u7a7a\u503c\u3002<\/li>\n<li><strong> \u7ea6\u675f\uff1a<\/strong> \u5916\u952e\u7ea6\u675f\u786e\u4fdd\u5b58\u50a8\u7684\u503c\u4e0e\u540c\u4e00\u8868\u4e2d\u5df2\u5b58\u5728\u7684\u4e3b\u952e\u5339\u914d\u3002<\/li>\n<li><strong> \u7d22\u5f15\uff1a<\/strong> \u867d\u7136\u5e76\u975e\u603b\u662f\u5f3a\u5236\u8981\u6c42\uff0c\u4f46\u5bf9\u5916\u952e\u5217\u5efa\u7acb\u7d22\u5f15\u53ef\u4ee5\u663e\u8457\u52a0\u5feb\u904d\u5386\u5c42\u6b21\u7ed3\u6784\u7684\u67e5\u8be2\u901f\u5ea6\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udcd0 \u5728\u5b9e\u4f53\u5173\u7cfb\u56fe\u4e2d\u8fdb\u884c\u53ef\u89c6\u5316<\/h2>\n<p>\u5728\u7ed8\u5236ERD\u4ee5\u8868\u793a\u81ea\u5f15\u7528\u5b9e\u4f53\u65f6\uff0c\u7b26\u53f7\u4e00\u5f00\u59cb\u53ef\u80fd\u4f1a\u8ba9\u4eba\u611f\u5230\u56f0\u60d1\u3002\u6807\u51c6\u7684ERD\u5de5\u5177\u4f7f\u7528\u7279\u5b9a\u7684\u7ebf\u6761\u6765\u8868\u793a\u8fde\u63a5\u3002<\/p>\n<p><strong>\u89c6\u89c9\u7b26\u53f7\u89c4\u5219\uff1a<\/strong><\/p>\n<ul>\n<li>\u5b9e\u4f53\u6846\u53ea\u7ed8\u5236\u4e00\u6b21\u3002<\/li>\n<li>\u5173\u7cfb\u7ebf\u5c06\u4e3b\u952e\u4e0e\u540c\u4e00\u6846\u5185\u7684\u5916\u952e\u8fde\u63a5\u8d77\u6765\u3002<\/li>\n<li>\u8fd9\u6761\u7ebf\u901a\u5e38\u4f1a\u56de\u7ed5\u5230\u5b9e\u4f53\uff0c\u5f62\u6210\u4e00\u4e2a\u89c6\u89c9\u4e0a\u7684\u5706\u5708\u3002<\/li>\n<li>\u57fa\u6570\u6807\u8bb0\uff081:1\uff0c1:M\uff09\u88ab\u653e\u7f6e\u5728\u8be5\u7ebf\u4e0a\uff0c\u4ee5\u8868\u793a\u7236\u7ea7\u53ef\u4ee5\u6709\u591a\u5c11\u4e2a\u5b50\u7ea7\u3002<\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b\uff1a\u7ec4\u7ec7\u7ed3\u6784<\/strong><\/p>\n<table border=\"1\" cellpadding=\"5\" cellspacing=\"0\">\n<thead>\n<tr>\n<th>\u6982\u5ff5<\/th>\n<th>\u63cf\u8ff0<\/th>\n<th>ERD\u7b26\u53f7<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u5458\u5de5<\/td>\n<td>\u88ab\u5efa\u6a21\u7684\u5b9e\u4f53<\/td>\n<td>\u6807\u6709\u201c\u5458\u5de5\u201d\u7684\u6846<\/td>\n<\/tr>\n<tr>\n<td>\u7ecf\u7406<\/td>\n<td>\u5f15\u7528\u540c\u4e00\u5f20\u8868\u7684\u89d2\u8272<\/td>\n<td>\u4ece\u7ecf\u7406ID\u5230\u5458\u5de5ID\u7684\u8fde\u7ebf<\/td>\n<\/tr>\n<tr>\n<td>\u6c47\u62a5\u5173\u7cfb<\/td>\n<td>\u9012\u5f52\u5173\u7cfb<\/td>\n<td>\u73af\u5f62\u7bad\u5934<\/td>\n<\/tr>\n<tr>\n<td>\u6839\u8282\u70b9<\/td>\n<td>\u9996\u5e2d\u6267\u884c\u5b98\u6216\u6700\u9ad8\u5c42\u4e3b\u7ba1<\/td>\n<td>\u7ecf\u7406ID\u4e3aNULL\u503c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83c\udf33 \u9012\u5f52\u6570\u636e\u7684\u5e38\u89c1\u5e94\u7528\u573a\u666f<\/h2>\n<p>\u9012\u5f52\u5173\u7cfb\u5e76\u975e\u7406\u8bba\u4e0a\u7684\u6982\u5ff5\uff1b\u5b83\u4eec\u5728\u6570\u636e\u5efa\u6a21\u4e2d\u89e3\u51b3\u4e86\u5b9e\u9645\u95ee\u9898\u3002\u4ee5\u4e0b\u662f\u8be5\u6a21\u5f0f\u6700\u5e38\u88ab\u5e94\u7528\u7684\u51e0\u79cd\u573a\u666f\u3002<\/p>\n<h3>1\ufe0f\u20e3 \u7ec4\u7ec7\u5c42\u7ea7<\/h3>\n<p>\u6bcf\u5bb6\u516c\u53f8\u90fd\u6709\u5176\u7ed3\u6784\u3002\u5458\u5de5\u5411\u7ecf\u7406\u6c47\u62a5\uff0c\u7ecf\u7406\u5411\u603b\u76d1\u6c47\u62a5\uff0c\u603b\u76d1\u5411\u526f\u603b\u88c1\u6c47\u62a5\u3002\u8fd9\u4e00\u94fe\u6761\u662f\u4e00\u79cd\u7ecf\u5178\u7684\u6811\u72b6\u7ed3\u6784\u3002<\/p>\n<ul>\n<li><strong>\u6570\u636e\u6a21\u578b\uff1a<\/strong> \u4e00\u5f20\u540d\u4e3a\u201c\u5458\u5de5\u201d\u7684\u8868\u3002<\/li>\n<li><strong> \u5217\uff1a<\/strong> <code>\u5458\u5de5\u7f16\u53f7<\/code>, <code>\u540d\u79f0<\/code>, <code>\u4e3b\u7ba1\u7f16\u53f7<\/code>.<\/li>\n<li><strong>\u903b\u8f91\uff1a<\/strong> \u8be5 <code>\u4e3b\u7ba1\u7f16\u53f7<\/code> \u5217\u5f15\u7528 <code>\u5458\u5de5\u7f16\u53f7<\/code>.<\/li>\n<li><strong>\u4f18\u52bf\uff1a<\/strong> \u65b0\u5458\u5de5\u5165\u804c\u53ea\u9700\u63d2\u5165\u4e00\u884c\u6570\u636e\u3002\u65e0\u9700\u4e3a\u6bcf\u4e2a\u90e8\u95e8\u521b\u5efa\u65b0\u7684\u8868\u3002<\/li>\n<\/ul>\n<h3>2\ufe0f\u20e3 \u5206\u7c7b\u6811<\/h3>\n<p>\u7535\u5546\u5e73\u53f0\u901a\u5e38\u5c06\u4ea7\u54c1\u7ec4\u7ec7\u6210\u5d4c\u5957\u7684\u5206\u7c7b\u3002\u7535\u5b50\u4ea7\u54c1 &gt; \u8ba1\u7b97\u673a &gt; \u7b14\u8bb0\u672c\u7535\u8111\u3002<\/p>\n<ul>\n<li><strong>\u6570\u636e\u6a21\u578b\uff1a<\/strong> \u4e00\u5f20\u540d\u4e3a\u201c\u5206\u7c7b\u201d\u7684\u8868\u3002<\/li>\n<li><strong>\u5217\uff1a<\/strong> <code>\u5206\u7c7b\u7f16\u53f7<\/code>, <code>\u540d\u79f0<\/code>, <code>\u7236\u7ea7\u7f16\u53f7<\/code>.<\/li>\n<li><strong>\u903b\u8f91\uff1a<\/strong> \u4e00\u4e2a\u5206\u7c7b\u53ef\u4ee5\u6709\u7236\u7ea7\uff0c\u4e5f\u53ef\u4ee5\u662f\u6839\u5206\u7c7b\uff08\u7236\u7ea7\u7f16\u53f7\u4e3a\u7a7a\uff09\u3002<\/li>\n<li><strong>\u4f18\u52bf\uff1a<\/strong> \u53ef\u4ee5\u7075\u6d3b\u6dfb\u52a0\u4efb\u610f\u6570\u91cf\u7684\u5b50\u5206\u7c7b\uff0c\u800c\u65e0\u9700\u66f4\u6539\u6570\u636e\u7ed3\u6784\u3002<\/li>\n<\/ul>\n<h3>3\ufe0f\u20e3 \u7269\u6599\u6e05\u5355\uff08BOM\uff09<\/h3>\n<p>\u5236\u9020\u901a\u5e38\u9700\u8981\u590d\u6742\u7684\u96f6\u90e8\u4ef6\u6e05\u5355\u3002\u4e00\u8f86\u6c7d\u8f66\u7531\u53d1\u52a8\u673a\u7ec4\u6210\uff0c\u800c\u53d1\u52a8\u673a\u53c8\u7531\u6d3b\u585e\u7ec4\u6210\u3002\u6709\u65f6\u4e00\u4e2a\u6d3b\u585e\u53ef\u80fd\u662f\u53e6\u4e00\u79cd\u53d1\u52a8\u673a\u578b\u53f7\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<ul>\n<li><strong>\u6570\u636e\u6a21\u578b\uff1a<\/strong> \u4e00\u5f20\u540d\u4e3a\u201cParts\u201d\u7684\u8868\u3002<\/li>\n<li><strong> \u5217\uff1a<\/strong> <code>\u96f6\u4ef6ID<\/code>, <code>\u63cf\u8ff0<\/code>, <code>\u7ec4\u4ef6ID<\/code>.<\/li>\n<li><strong>\u903b\u8f91\uff1a<\/strong> \u4e00\u4e2a\u96f6\u4ef6\u672c\u8eab\u4e5f\u53ef\u4ee5\u662f\u4e00\u4e2a\u7ec4\u4ef6\uff0c\u5305\u542b\u5176\u4ed6\u96f6\u4ef6\u3002<\/li>\n<li><strong>\u4f18\u52bf\uff1a<\/strong> \u652f\u6301\u591a\u5c42\u7ea7\u7684\u5236\u9020\u7ed3\u6784\u3002<\/li>\n<\/ul>\n<h3>4\ufe0f\u20e3 \u8bc4\u8bba\u7ebf\u7a0b<\/h3>\n<p>\u8bba\u575b\u548c\u535a\u5ba2\u5141\u8bb8\u7528\u6237\u56de\u590d\u8bc4\u8bba\u3002\u4e00\u6761\u8bc4\u8bba\u53ef\u4ee5\u6709\u4e00\u4e2a\u5b83\u6240\u56de\u590d\u7684\u7236\u8bc4\u8bba\uff0c\u4e5f\u53ef\u4ee5\u662f\u72ec\u7acb\u7684\u8bc4\u8bba\u3002<\/p>\n<ul>\n<li><strong>\u6570\u636e\u6a21\u578b\uff1a<\/strong> \u4e00\u5f20\u540d\u4e3a\u201cComments\u201d\u7684\u8868\u3002<\/li>\n<li><strong> \u5217\uff1a<\/strong> <code>\u8bc4\u8bbaID<\/code>, <code>\u7528\u6237ID<\/code>, <code>\u5185\u5bb9<\/code>, <code>\u7236\u8bc4\u8bbaID<\/code>.<\/li>\n<li><strong>\u903b\u8f91\uff1a<\/strong> \u56de\u590d\u4f1a\u94fe\u63a5\u56de\u539f\u59cb\u8bc4\u8bba\u7684ID\u3002<\/li>\n<li><strong>\u4f18\u52bf\uff1a<\/strong> \u652f\u6301\u8ba8\u8bba\u7684\u65e0\u9650\u5d4c\u5957\u3002<\/li>\n<\/ul>\n<h2>\u2699\ufe0f \u5b9e\u73b0\u6ce8\u610f\u4e8b\u9879<\/h2>\n<p>\u8bbe\u8ba1\u6a21\u5f0f\u53ea\u662f\u7b2c\u4e00\u6b65\u3002\u786e\u4fdd\u6570\u636e\u5728\u5404\u79cd\u6761\u4ef6\u4e0b\u90fd\u80fd\u6b63\u786e\u8fd0\u884c\uff0c\u9700\u8981\u4ed4\u7ec6\u89c4\u5212\u3002<\/p>\n<h3>\ud83d\uded1 \u9632\u6b62\u5faa\u73af\u5f15\u7528<\/h3>\n<p>\u9012\u5f52\u5173\u7cfb\u4e2d\u7684\u4e00\u4e2a\u5173\u952e\u98ce\u9669\u662f\u5f62\u6210\u5faa\u73af\u3002\u4f8b\u5982\uff0c\u5458\u5de5A\u7ba1\u7406\u5458\u5de5B\uff0c\u800c\u5458\u5de5B\u53c8\u7ba1\u7406\u5458\u5de5A\u3002\u8fd9\u4f1a\u5bfc\u81f4\u65e0\u9650\u5faa\u73af\u3002<\/p>\n<ul>\n<li><strong>\u5e94\u7528\u903b\u8f91\uff1a<\/strong> \u5728\u63d2\u5165\u6216\u66f4\u65b0\u6570\u636e\u65f6\uff0c\u5e94\u7528\u7a0b\u5e8f\u5e94\u9a8c\u8bc1\u5c42\u7ea7\u6df1\u5ea6\uff0c\u4ee5\u786e\u4fdd\u4e0d\u4f1a\u5f62\u6210\u5faa\u73af\u3002<\/li>\n<li><strong>\u6570\u636e\u5e93\u7ea6\u675f\uff1a<\/strong> \u867d\u7136\u6807\u51c6SQL\u7ea6\u675f\u96be\u4ee5\u8f7b\u6613\u9632\u6b62\u5faa\u73af\uff08\u56e0\u4e3a\u5b83\u4eec\u68c0\u67e5\u7684\u662f\u5f53\u524d\u72b6\u6001\uff0c\u800c\u975e\u7ed3\u679c\u72b6\u6001\uff09\uff0c\u4f46\u5728\u67d0\u4e9b\u7cfb\u7edf\u4e2d\u53ef\u4ee5\u4f7f\u7528\u89e6\u53d1\u5668\u5728\u5199\u5165\u524d\u9a8c\u8bc1\u8def\u5f84\u3002<\/li>\n<li><strong>\u6839\u8282\u70b9\u8bc6\u522b\uff1a<\/strong> \u786e\u4fdd\u6bcf\u4e2a\u6709\u6548\u7684\u6811\u7ed3\u6784\u6070\u597d\u6709\u4e00\u4e2a\u6839\u8282\u70b9\uff08\u5373\u5916\u952e\u4e3anull\u7684\u8282\u70b9\uff09\u3002<\/li>\n<\/ul>\n<h3>\ud83d\udcc9 \u5904\u7406\u7a7a\u503c<\/h3>\n<p>\u5c42\u6b21\u7ed3\u6784\u7684\u6839\u662f\u8d77\u70b9\u3002\u5728\u6807\u51c6\u7684\u9012\u5f52\u5173\u7cfb\u4e2d\uff0c\u6839\u884c\u5728\u5916\u952e\u5217\u4e2d\u5177\u6709\u7a7a\u503c\u3002<\/p>\n<ul>\n<li><strong>\u67e5\u8be2\uff1a<\/strong> \u8981\u67e5\u627e\u6240\u6709\u6839\u8282\u70b9\uff0c\u8bf7\u67e5\u8be2\u5916\u952e\u4e3aNULL\u7684\u884c\u3002<\/li>\n<li><strong>\u9ed8\u8ba4\u503c\uff1a<\/strong> \u5982\u679c\u9ed8\u8ba4\u503c\u6697\u793a\u4e86\u7236\u8282\u70b9\uff0c\u5219\u4e0d\u5e94\u4e3a\u5916\u952e\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u30020\u6216-1\u7684\u9ed8\u8ba4\u503c\u53ef\u80fd\u5177\u6709\u8bef\u5bfc\u6027\uff0c\u5e76\u5bfc\u81f4\u6570\u636e\u5b8c\u6574\u6027\u95ee\u9898\u3002<\/li>\n<li><strong>\u5b8c\u6574\u6027\uff1a<\/strong> \u786e\u4fdd\u6570\u636e\u5e93\u5f15\u64ce\u5141\u8bb8\u5916\u952e\u5217\u4e3a\u7a7a\u3002NOT NULL\u7ea6\u675f\u5c06\u7834\u574f\u5c42\u6b21\u7ed3\u6784\u6a21\u578b\u3002<\/li>\n<\/ul>\n<h3>\ud83d\udcc8 \u6027\u80fd\u4e0e\u7d22\u5f15<\/h3>\n<p>\u968f\u7740\u6570\u636e\u7684\u589e\u957f\uff0c\u67e5\u8be2\u9012\u5f52\u7ed3\u6784\u53ef\u80fd\u4f1a\u53d8\u5f97\u7f13\u6162\u3002\u67e5\u627e\u7279\u5b9a\u8282\u70b9\u6240\u6709\u540e\u4ee3\u7684\u7b80\u5355\u67e5\u8be2\u53ef\u80fd\u9700\u8981\u591a\u6b21\u8fde\u63a5\u6216\u9012\u5f52\u67e5\u8be2\u3002<\/p>\n<p><strong>\u4f18\u5316\u7b56\u7565\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u7d22\u5f15\u5916\u952e\uff1a<\/strong> \u5728\u5b58\u50a8\u7236\u7ea7\u5f15\u7528\u7684\u5217\u4e0a\u521b\u5efa\u7d22\u5f15\u3002\u8fd9\u53ef\u4ee5\u52a0\u5feb\u67e5\u627e\u5b50\u8282\u70b9\u7684\u901f\u5ea6\u3002<\/li>\n<li><strong>\u7269\u5316\u8def\u5f84\uff1a<\/strong> \u67d0\u4e9b\u7cfb\u7edf\u5c06\u5c42\u6b21\u7ed3\u6784\u7684\u5b8c\u6574\u8def\u5f84\u5b58\u50a8\u5728\u5355\u72ec\u7684\u5217\u4e2d\uff08\u4f8b\u5982\u201c\/1\/5\/12\/20\u201d\uff09\u3002\u8fd9\u5141\u8bb8\u66f4\u5feb\u7684\u57fa\u4e8e\u5b57\u7b26\u4e32\u7684\u8fc7\u6ee4\uff0c\u4f46\u6bcf\u6b21\u63d2\u5165\u90fd\u9700\u8981\u66f4\u65b0\u3002<\/li>\n<li><strong>\u5d4c\u5957\u96c6\u5408\uff1a<\/strong> \u4e00\u79cd\u66ff\u4ee3\u7b97\u6cd5\uff0c\u4f7f\u7528\u5de6\u503c\u548c\u53f3\u503c\u6765\u8868\u793a\u6df1\u5ea6\u3002\u68c0\u7d22\u901f\u5ea6\u66f4\u5feb\uff0c\u4f46\u63d2\u5165\u901f\u5ea6\u8f83\u6162\u3002<\/li>\n<li><strong>\u67e5\u8be2\u6df1\u5ea6\uff1a<\/strong> \u9650\u5236\u67e5\u8be2\u4e2d\u7684\u9012\u5f52\u6df1\u5ea6\u3002\u5982\u679c\u672a\u8bbe\u7f6e\u4e0a\u9650\uff0c\u65e0\u9650\u5faa\u73af\u53ef\u80fd\u5bfc\u81f4\u6570\u636e\u5e93\u5f15\u64ce\u5d29\u6e83\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udd0d \u67e5\u8be2\u9012\u5f52\u6570\u636e<\/h2>\n<p>\u83b7\u53d6\u5c42\u6b21\u5316\u6570\u636e\u6bd4\u83b7\u53d6\u6241\u5e73\u6570\u636e\u66f4\u590d\u6742\u3002\u6807\u51c6\u7684JOIN\u64cd\u4f5c\u4ec5\u9002\u7528\u4e8e\u5355\u5c42\uff0c\u4f46\u591a\u5c42\u7ed3\u6784\u9700\u8981\u4e13\u95e8\u7684\u903b\u8f91\u3002<\/p>\n<h3>\ud83d\udd04 \u81ea\u8fde\u63a5<\/h3>\n<p>\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u5c06\u8868\u4e0e\u81ea\u8eab\u8fdb\u884c\u8fde\u63a5\u3002\u4f60\u9700\u8981\u5c06\u8868\u522b\u540d\u4e00\u6b21\u8bbe\u4e3a\u7236\u8282\u70b9\uff0c\u4e00\u6b21\u8bbe\u4e3a\u5b50\u8282\u70b9\u3002<\/p>\n<ul>\n<li><strong>\u5355\u5c42\uff1a<\/strong> \u5c06\u8868\u4e0e\u81ea\u8eab\u8fde\u63a5\u4e00\u6b21\uff0c\u4ee5\u83b7\u53d6\u76f4\u63a5\u7236\u8282\u70b9\u3002<\/li>\n<li><strong>\u591a\u5c42\uff1a<\/strong> \u9700\u8981\u591a\u6b21\u8fde\u63a5\uff0c\u5f88\u5feb\u5c31\u4f1a\u53d8\u5f97\u96be\u4ee5\u5904\u7406\u3002<\/li>\n<li><strong>\u7f3a\u70b9\uff1a<\/strong> \u6240\u9700\u7684\u8fde\u63a5\u6b21\u6570\u7b49\u4e8e\u5c42\u6b21\u7ed3\u6784\u7684\u6df1\u5ea6\u3002<\/li>\n<\/ul>\n<h3>\ud83d\udd01 \u9012\u5f52\u516c\u7528\u8868\u8868\u8fbe\u5f0f\uff08CTEs\uff09<\/h3>\n<p>\u73b0\u4ee3\u6570\u636e\u5e93\u5f15\u64ce\u652f\u6301\u9012\u5f52CTE\u3002\u8fd9\u4f7f\u5f97\u67e5\u8be2\u53ef\u4ee5\u53cd\u590d\u4e0e\u81ea\u8eab\u8fdb\u884cUNION ALL\u64cd\u4f5c\uff0c\u76f4\u5230\u4e0d\u518d\u627e\u5230\u5339\u914d\u7684\u884c\u4e3a\u6b62\u3002<\/p>\n<ul>\n<li><strong>\u951a\u70b9\u6210\u5458\uff1a<\/strong> \u9012\u5f52\u7684\u8d77\u59cb\u70b9\uff08\u901a\u5e38\u662f\u6839\u8282\u70b9\uff09\u3002<\/li>\n<li><strong> \u9012\u5f52\u6210\u5458\uff1a<\/strong> \u67e5\u8be2\u4e2d\u5c06\u7ed3\u679c\u91cd\u65b0\u8fde\u63a5\u56de\u8868\u4ee5\u67e5\u627e\u4e0b\u4e00\u5c42\u7684\u90e8\u5206\u3002<\/li>\n<li><strong> \u7ec8\u6b62\u6761\u4ef6\uff1a<\/strong> \u5f53\u4e0d\u518d\u627e\u5230\u5339\u914d\u7684\u884c\u65f6\uff0c\u67e5\u8be2\u505c\u6b62\u3002<\/li>\n<li><strong> \u4f18\u52bf\uff1a<\/strong> \u65e0\u9700\u9884\u5148\u77e5\u9053\u5c42\u6b21\u6df1\u5ea6\u5373\u53ef\u5904\u7406\u4efb\u610f\u6df1\u5ea6\u7684\u5c42\u6b21\u7ed3\u6784\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udee1\ufe0f \u6570\u636e\u5b8c\u6574\u6027\u548c\u7ea6\u675f<\/h2>\n<p>\u7ef4\u62a4\u81ea\u5f15\u7528\u8868\u7684\u5b8c\u6574\u6027\u81f3\u5173\u91cd\u8981\u3002\u5982\u679c\u5220\u9664\u4e86\u7236\u8282\u70b9\uff0c\u5b50\u8282\u70b9\u4f1a\u600e\u6837\uff1f<\/p>\n<h3>\ud83d\uddd1\ufe0f \u5220\u9664\u7ea7\u8054<\/h3>\n<p>\u5f53\u5220\u9664\u7236\u884c\u65f6\uff0c\u6570\u636e\u5e93\u5fc5\u987b\u51b3\u5b9a\u5982\u4f55\u5904\u7406\u5b50\u884c\u3002<\/p>\n<ul>\n<li><strong>RESTRICT\uff08\u9650\u5236\uff09\uff1a<\/strong> \u5982\u679c\u5b58\u5728\u5b50\u8282\u70b9\uff0c\u5219\u963b\u6b62\u7236\u8282\u70b9\u7684\u5220\u9664\u3002\u8fd9\u53ef\u4ee5\u4fdd\u62a4\u6570\u636e\uff0c\u4f46\u53ef\u80fd\u4f1a\u963b\u788d\u5fc5\u8981\u7684\u6e05\u7406\u64cd\u4f5c\u3002<\/li>\n<li><strong>CASCADE\uff08\u7ea7\u8054\uff09\uff1a<\/strong> \u5220\u9664\u7236\u8282\u70b9\u65f6\uff0c\u4e5f\u4f1a\u5220\u9664\u6240\u6709\u5b50\u8282\u70b9\u3002\u5728\u6df1\u5c42\u5c42\u6b21\u7ed3\u6784\u4e2d\u8fd9\u5f88\u5371\u9669\uff0c\u53ef\u80fd\u5bfc\u81f4\u610f\u5916\u5220\u9664\u5927\u91cf\u6570\u636e\u3002<\/li>\n<li><strong>SET NULL\uff08\u8bbe\u4e3a\u7a7a\uff09\uff1a<\/strong> \u5c06\u5b50\u8282\u70b9\u7684\u5916\u952e\u8bbe\u4e3aNULL\uff0c\u4f7f\u5176\u6210\u4e3a\u65b0\u7684\u6839\u8282\u70b9\u3002\u8fd9\u901a\u5e38\u662f\u4fdd\u6301\u6570\u636e\u7ed3\u6784\u5b89\u5168\u7684\u9996\u9009\u65b9\u6848\u3002<\/li>\n<li><strong>\u8bbe\u7f6e\u9ed8\u8ba4\u503c\uff1a<\/strong> \u5c06\u5916\u952e\u8bbe\u7f6e\u4e3a\u9ed8\u8ba4\u503c\uff08\u4f8b\u5982\uff0c\u67d0\u4e2a\u7279\u5b9a\u7684\u5b64\u7acb\u7c7b\u522b\uff09\u3002<\/li>\n<\/ul>\n<h3>\ud83d\udd12 \u66f4\u65b0\u7ea6\u675f<\/h3>\n<p>\u66f4\u6539\u7236\u884c\u7684\u4e3b\u952e\u5b58\u5728\u98ce\u9669\u3002\u5982\u679c\u4f60\u66f4\u6539\u4e86\u7ecf\u7406\u7684ID\uff0c\u5c31\u5fc5\u987b\u5728\u6240\u6709\u5f15\u7528\u8be5\u7ecf\u7406\u7684\u5458\u5de5\u8bb0\u5f55\u4e2d\u66f4\u65b0\u8be5ID\u3002<\/p>\n<ul>\n<li><strong>\u5e94\u7528\u5c42\uff1a<\/strong> \u4ee5\u4e8b\u52a1\u65b9\u5f0f\u5904\u7406\u66f4\u65b0\uff0c\u786e\u4fdd\u6240\u6709\u5f15\u7528\u540c\u65f6\u66f4\u65b0\u3002<\/li>\n<li><strong>\u6570\u636e\u5e93\u89e6\u53d1\u5668\uff1a<\/strong> \u53ef\u4ee5\u81ea\u52a8\u4f20\u64adID\u53d8\u66f4\uff0c\u4f46\u4f1a\u589e\u52a0\u590d\u6742\u6027\u3002<\/li>\n<li><strong>\u6700\u4f73\u5b9e\u8df5\uff1a<\/strong> \u5c3d\u53ef\u80fd\u907f\u514d\u5728\u9012\u5f52\u7ed3\u6784\u4e2d\u66f4\u65b0\u4e3b\u952e\u3002\u5e94\u4f7f\u7528\u4ee3\u7406\u952e\uff08\u81ea\u589e\u6574\u6570\uff09\u800c\u975e\u81ea\u7136\u952e\uff08\u5982\u5458\u5de5\u4ee3\u7801\uff09\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udea7 \u6392\u67e5\u5e38\u89c1\u95ee\u9898<\/h2>\n<p>\u5373\u4f7f\u8bbe\u8ba1\u5f97\u5f53\uff0c\u5f00\u53d1\u548c\u7ef4\u62a4\u8fc7\u7a0b\u4e2d\u4ecd\u53ef\u80fd\u51fa\u73b0\u95ee\u9898\u3002<\/p>\n<h3>\u2753 \u5982\u4f55\u67e5\u627e\u6811\u7684\u6df1\u5ea6\uff1f<\/h3>\n<p>\u8981\u786e\u5b9a\u7279\u5b9a\u884c\u7684\u5c42\u7ea7\uff0c\u5fc5\u987b\u4ece\u8be5\u884c\u5411\u4e0a\u904d\u5386\u5230\u6839\u8282\u70b9\u3002\u8ba1\u7b97\u7ecf\u8fc7\u7684\u8df3\u6570\u3002<\/p>\n<ul>\n<li><strong>\u67e5\u8be2\u65b9\u6cd5\uff1a<\/strong> \u4f7f\u7528\u9012\u5f52\u67e5\u8be2\uff0c\u5728\u5411\u4e0a\u79fb\u52a8\u65f6\u7edf\u8ba1\u884c\u6570\u3002<\/li>\n<li><strong>\u5e94\u7528\u65b9\u6cd5\uff1a<\/strong> \u5728\u63d2\u5165\u65f6\u5c06\u6df1\u5ea6\u5b58\u50a8\u5728\u5217\u4e2d\u3002\u8fd9\u53ef\u4ee5\u8282\u7701\u67e5\u8be2\u65f6\u95f4\uff0c\u4f46\u9700\u8981\u7ef4\u62a4\u3002<\/li>\n<\/ul>\n<h3>\u2753 \u5982\u4f55\u5904\u7406\u5b64\u7acb\u8282\u70b9\uff1f<\/h3>\n<p>\u5b64\u7acb\u8282\u70b9\u662f\u6307\u5916\u952e\u6307\u5411\u4e0d\u5b58\u5728\u7684\u7236\u8282\u70b9\u7684\u884c\u3002\u8fd9\u901a\u5e38\u662f\u7531\u4e8e\u9519\u8bef\u6216\u624b\u52a8\u6570\u636e\u8f93\u5165\u9519\u8bef\u5bfc\u81f4\u7684\u3002<\/p>\n<ul>\n<li><strong>\u9a8c\u8bc1\uff1a<\/strong> \u5b9a\u671f\u8fd0\u884c\u5b8c\u6574\u6027\u68c0\u67e5\uff0c\u4ee5\u67e5\u627e\u5916\u952e\u4e0d\u5339\u914d\u4efb\u4f55\u4e3b\u952e\u7684\u884c\u3002<\/li>\n<li><strong>\u6062\u590d\uff1a<\/strong> \u5236\u5b9a\u5904\u7406\u7b56\u7565\uff1a\u5c06\u5176\u79fb\u81f3\u6839\u7c7b\u522b\u3001\u5220\u9664\u6216\u6807\u8bb0\u4e3a\u5f85\u5ba1\u6838\u3002<\/li>\n<\/ul>\n<h3>\u2753 \u968f\u65f6\u95f4\u63a8\u79fb\u6027\u80fd\u4e0b\u964d<\/h3>\n<p>\u968f\u7740\u6811\u7684\u589e\u5927\uff0c\u626b\u63cf\u6574\u4e2a\u6811\u7684\u67e5\u8be2\u4f1a\u53d8\u5f97\u8d8a\u6765\u8d8a\u6162\u3002<\/p>\n<ul>\n<li><strong>\u7f13\u5b58\uff1a<\/strong> \u5c06\u9891\u7e41\u8bbf\u95ee\u7684\u5c42\u6b21\u7ed3\u6784\u7f13\u5b58\u5728\u5e94\u7528\u5185\u5b58\u4e2d\u3002<\/li>\n<li><strong>\u5f52\u6863\uff1a<\/strong> \u5c06\u5c42\u6b21\u7ed3\u6784\u4e2d\u7684\u5386\u53f2\u6216\u4e0d\u6d3b\u8dc3\u90e8\u5206\u79fb\u81f3\u5f52\u6863\u8868\u4e2d\u3002<\/li>\n<li><strong>\u5206\u533a\uff1a<\/strong> \u5982\u679c\u6570\u636e\u91cf\u5de8\u5927\uff0c\u6309\u6839\u7c7b\u522b\u5bf9\u8868\u8fdb\u884c\u5206\u533a\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udcdd \u6700\u4f73\u5b9e\u8df5\u6458\u8981<\/h2>\n<p>\u4e3a\u786e\u4fdd\u81ea\u5f15\u7528\u5b9e\u4f53\u7684\u7a33\u5065\u5b9e\u73b0\uff0c\u8bf7\u9075\u5faa\u4ee5\u4e0b\u6307\u5357\u3002<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u4ee3\u7406\u952e\uff1a<\/strong> \u4f18\u5148\u4e3a\u4e3b\u952e\u4f7f\u7528\u81ea\u589e\u6574\u6570\uff0c\u800c\u975e\u4e1a\u52a1\u952e\u3002<\/li>\n<li><strong>\u5141\u8bb8\u7a7a\u503c\uff1a<\/strong> \u786e\u4fdd\u5916\u952e\u5217\u5141\u8bb8\u6839\u8282\u70b9\u4e3a\u7a7a\u503c\u3002<\/li>\n<li><strong>\u4e3a\u5916\u952e\u5efa\u7acb\u7d22\u5f15\uff1a<\/strong> \u59cb\u7ec8\u4e3a\u5b58\u50a8\u7236\u7ea7\u5f15\u7528\u7684\u5217\u5efa\u7acb\u7d22\u5f15\u3002<\/li>\n<li><strong>\u9a8c\u8bc1\u5faa\u73af\uff1a<\/strong> \u5b9e\u73b0\u68c0\u67e5\u4ee5\u9632\u6b62\u5faa\u73af\u5f15\u7528\uff08A -&gt; B -&gt; A\uff09\u3002<\/li>\n<li><strong>\u9650\u5236\u9012\u5f52\uff1a<\/strong> \u9650\u5236\u67e5\u8be2\u4e2d\u7684\u9012\u5f52\u6df1\u5ea6\uff0c\u4ee5\u9632\u6b62\u6808\u6ea2\u51fa\u3002<\/li>\n<li><strong>\u8bb0\u5f55\u6a21\u5f0f\uff1a<\/strong> \u5728\u4f60\u7684ERD\u6587\u6863\u4e2d\u660e\u786e\u6807\u6ce8\u54ea\u4e9b\u5217\u662f\u81ea\u5f15\u7528\u7684\u3002<\/li>\n<li><strong>\u89c4\u5212\u5220\u9664\u64cd\u4f5c\uff1a<\/strong> \u660e\u786e\u5b9a\u4e49\u5728\u7236\u7ea7\u5220\u9664\u65f6\u7684\u7ea7\u8054\u5220\u9664\u89c4\u5219\u6216\u8bbe\u7f6e\u4e3a\u7a7a\u503c\u7684\u89c4\u5219\u3002<\/li>\n<li><strong>\u6d4b\u8bd5\u6df1\u5c42\u5c42\u7ea7\uff1a<\/strong> \u4f7f\u7528\u81f3\u5c1110\u5c42\u6df1\u5ea6\u7684\u67e5\u8be2\u8fdb\u884c\u6d4b\u8bd5\uff0c\u4ee5\u786e\u4fdd\u6027\u80fd\u7a33\u5b9a\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udd2e \u672a\u6765\u8003\u91cf<\/h2>\n<p>\u6570\u636e\u5e93\u6280\u672f\u6301\u7eed\u6f14\u8fdb\u3002\u5c3d\u7ba1\u81ea\u5f15\u7528\u5b9e\u4f53\u7684\u6982\u5ff5\u4fdd\u6301\u4e0d\u53d8\uff0c\u4f46\u7ba1\u7406\u5b83\u7684\u5de5\u5177\u6b63\u5728\u4e0d\u65ad\u6539\u8fdb\u3002<\/p>\n<ul>\n<li><strong>\u56fe\u6570\u636e\u5e93\uff1a<\/strong> \u67d0\u4e9b\u73b0\u4ee3\u7cfb\u7edf\u5c06\u5173\u7cfb\u89c6\u4e3a\u4e00\u7b49\u516c\u6c11\u3002\u5b83\u4eec\u539f\u751f\u5730\u5904\u7406\u9012\u5f52\u8def\u5f84\uff0c\u65e0\u9700\u590d\u6742\u7684SQL\u3002<\/li>\n<li><strong>JSON\u652f\u6301\uff1a<\/strong> \u66f4\u65b0\u7684\u6570\u636e\u5e93\u5f15\u64ce\u5141\u8bb8\u5728JSON\u5217\u4e2d\u5b58\u50a8\u5c42\u6b21\u5316\u6570\u636e\uff0c\u8fd9\u53ef\u4ee5\u7b80\u5316\u6df1\u5c42\u5d4c\u5957\u7ed3\u6784\u7684\u6a21\u5f0f\u8bbe\u8ba1\u3002<\/li>\n<li><strong>ORM\u6539\u8fdb\uff1a<\/strong> \u5bf9\u8c61\u5173\u7cfb\u6620\u5c04\u5668\u5728\u81ea\u52a8\u5904\u7406\u9012\u5f52\u5173\u7cfb\u65b9\u9762\u8d8a\u6765\u8d8a\u51fa\u8272\uff0c\u51cf\u5c11\u4e86\u6837\u677f\u4ee3\u7801\u3002<\/li>\n<\/ul>\n<p>\u5c3d\u7ba1\u6709\u8fd9\u4e9b\u8fdb\u6b65\uff0c\u9012\u5f52\u5173\u7cfb\u7684\u6838\u5fc3\u903b\u8f91\u4ecd\u7136\u4e0d\u53d8\u3002\u7406\u89e3\u4e3b\u952e\u3001\u5916\u952e\u548c\u8868\u5173\u7cfb\u7684\u5e95\u5c42\u673a\u5236\uff0c\u5bf9\u4e8e\u4efb\u4f55\u4ece\u4e8b\u6570\u636e\u7ed3\u6784\u5de5\u4f5c\u7684\u6280\u672f\u4eba\u5458\u90fd\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p>\u901a\u8fc7\u9075\u5faa\u8fd9\u4e9b\u539f\u5219\uff0c\u4f60\u53ef\u4ee5\u6784\u5efa\u51fa\u8db3\u591f\u7075\u6d3b\u4ee5\u5904\u7406\u590d\u6742\u5c42\u7ea7\u7ed3\u6784\uff0c\u540c\u65f6\u4fdd\u6301\u9ad8\u6027\u80fd\u548c\u53ef\u7ef4\u62a4\u6027\u7684\u7cfb\u7edf\u3002\u53ea\u8981\u4f7f\u7528\u5f97\u5f53\uff0c\u81ea\u5f15\u7528\u5b9e\u4f53\u5c31\u662f\u4f60\u6570\u636e\u5efa\u6a21\u5de5\u5177\u7bb1\u4e2d\u7684\u5f3a\u5927\u5de5\u5177\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u7684\u590d\u6742\u67b6\u6784\u4e2d\uff0c\u5f88\u5c11\u6709\u6982\u5ff5\u80fd\u50cf\u81ea\u5f15\u7528\u5b9e\u4f53\u4e00\u6837\u5bf9\u5de5\u7a0b&hellip;<\/p>\n","protected":false},"author":1,"featured_media":1672,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"ERD \u4e2d\u7684\u81ea\u5f15\u7528\u5b9e\u4f53\uff1a\u5b8c\u6574\u6307\u5357 \ud83d\udd17","_yoast_wpseo_metadesc":"\u5b66\u4e60\u5982\u4f55\u5728 ERD \u4e2d\u8bbe\u8ba1\u548c\u5b9e\u73b0\u81ea\u5f15\u7528\u5b9e\u4f53\u53ca\u9012\u5f52\u5173\u7cfb\u3002\u6db5\u76d6\u6a21\u5f0f\u8bbe\u8ba1\u3001\u5c42\u6b21\u7ed3\u6784\u5904\u7406\u548c\u6027\u80fd\u4f18\u5316\u6280\u5de7\u3002","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[86],"tags":[82,85],"class_list":["post-1671","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-erd","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>ERD \u4e2d\u7684\u81ea\u5f15\u7528\u5b9e\u4f53\uff1a\u5b8c\u6574\u6307\u5357 \ud83d\udd17<\/title>\n<meta name=\"description\" content=\"\u5b66\u4e60\u5982\u4f55\u5728 ERD \u4e2d\u8bbe\u8ba1\u548c\u5b9e\u73b0\u81ea\u5f15\u7528\u5b9e\u4f53\u53ca\u9012\u5f52\u5173\u7cfb\u3002\u6db5\u76d6\u6a21\u5f0f\u8bbe\u8ba1\u3001\u5c42\u6b21\u7ed3\u6784\u5904\u7406\u548c\u6027\u80fd\u4f18\u5316\u6280\u5de7\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.go-diagram.com\/cn\/self-referencing-entities-recursive-relationships-erd\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ERD \u4e2d\u7684\u81ea\u5f15\u7528\u5b9e\u4f53\uff1a\u5b8c\u6574\u6307\u5357 \ud83d\udd17\" \/>\n<meta property=\"og:description\" content=\"\u5b66\u4e60\u5982\u4f55\u5728 ERD 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