{"id":168013,"date":"2024-11-06T08:47:27","date_gmt":"2024-11-06T00:47:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/168013\/"},"modified":"2024-11-06T08:47:27","modified_gmt":"2024-11-06T00:47:27","slug":"%e8%81%8a%e8%81%8a%e6%a8%b9%e7%8b%80%e7%b5%90%e6%a7%8b%e5%a6%82%e4%bd%95%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%ad%98%e5%84%b2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/168013\/","title":{"rendered":"\u804a\u804a\u6a39\u72c0\u7d50\u69cb\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u5b58\u5132"},"content":{"rendered":"<h1 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id=\"%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%ad%98%e5%84%b2%e6%a8%b9%e7%8b%80%e7%b5%90%e6%a7%8b%e7%9a%84%e6%96%b9%e6%b3%95-nUyxirGnrC\">\u5728\u6578\u64da\u5eab\u4e2d\u5b58\u5132\u6a39\u72c0\u7d50\u69cb\u7684\u65b9\u6cd5<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\u5b58\u5132\u6a39\u72c0\u7d50\u69cb\u6709\u5e7e\u7a2e\u5e38\u898b\u7684\u65b9\u6cd5\uff0c\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u4e3b\u8981\u7684\u5b58\u5132\u65b9\u5f0f\uff1a<\/p>\n<h3 id=\"1-%e5%b5%8c%e5%a5%97%e9%9b%86%e6%a8%a1%e5%9e%8b%ef%bc%88nested-set-model%ef%bc%89-nUyxirGnrC\">1. \u5d4c\u5957\u96c6\u6a21\u578b\uff08Nested Set Model\uff09<\/h3>\n<p>\u5d4c\u5957\u96c6\u6a21\u578b\u662f\u4e00\u7a2e\u5c07\u6a39\u72c0\u7d50\u69cb\u8f49\u63db\u70ba\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u8868\u683c\u7684\u65b9\u5f0f\u3002\u6bcf\u500b\u7bc0\u9ede\u90fd\u6709\u5169\u500b\u984d\u5916\u7684\u5c6c\u6027\uff1a\u5de6\u503c\uff08Left\uff09\u548c\u53f3\u503c\uff08Right\uff09\u3002\u9019\u5169\u500b\u503c\u7528\u4f86\u8868\u793a\u7bc0\u9ede\u5728\u6a39\u4e2d\u7684\u4f4d\u7f6e\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u512a\u9ede\u662f\u67e5\u8a62\u6548\u7387\u9ad8\uff0c\u4f46\u5728\u63d2\u5165\u548c\u522a\u9664\u7bc0\u9ede\u6642\u9700\u8981\u66f4\u65b0\u5927\u91cf\u7684\u6578\u64da\u3002<\/p>\n<pre><code>CREATE TABLE categories (\n    id INT PRIMARY KEY,\n    name VARCHAR(100),\n    lft INT,\n    rgt INT\n);\n<\/code><\/pre>\n<h3 id=\"2-%e9%84%b0%e6%8e%a5%e5%88%97%e8%a1%a8%e6%a8%a1%e5%9e%8b%ef%bc%88adjacency-list-model%ef%bc%89-nUyxirGnrC\">2. \u9130\u63a5\u5217\u8868\u6a21\u578b\uff08Adjacency List Model\uff09<\/h3>\n<p>\u9130\u63a5\u5217\u8868\u6a21\u578b\u662f\u6700\u7c21\u55ae\u7684\u6a39\u72c0\u7d50\u69cb\u5b58\u5132\u65b9\u5f0f\u3002\u6bcf\u500b\u7bc0\u9ede\u90fd\u6709\u4e00\u500b\u6307\u5411\u5176\u7236\u7bc0\u9ede\u7684\u5916\u9375\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u512a\u9ede\u662f\u7d50\u69cb\u7c21\u55ae\uff0c\u6613\u65bc\u7406\u89e3\uff0c\u4f46\u5728\u67e5\u8a62\u6574\u500b\u6a39\u6642\u6548\u7387\u8f03\u4f4e\uff0c\u56e0\u70ba\u9700\u8981\u591a\u6b21\u67e5\u8a62\u3002<\/p>\n<pre><code>CREATE TABLE categories (\n    id INT PRIMARY KEY,\n    name VARCHAR(100),\n    parent_id INT,\n    FOREIGN KEY (parent_id) REFERENCES categories(id)\n);\n<\/code><\/pre>\n<h3 id=\"3-%e8%b7%af%e5%be%91%e6%9e%9a%e8%88%89%e6%a8%a1%e5%9e%8b%ef%bc%88path-enumeration-model%ef%bc%89-nUyxirGnrC\">3. \u8def\u5f91\u679a\u8209\u6a21\u578b\uff08Path Enumeration Model\uff09<\/h3>\n<p>\u8def\u5f91\u679a\u8209\u6a21\u578b\u5c07\u6bcf\u500b\u7bc0\u9ede\u7684\u5b8c\u6574\u8def\u5f91\u5b58\u5132\u70ba\u4e00\u500b\u5b57\u7b26\u4e32\u3002\u9019\u7a2e\u65b9\u6cd5\u4f7f\u5f97\u67e5\u8a62\u67d0\u500b\u7bc0\u9ede\u7684\u6240\u6709\u5b50\u7bc0\u9ede\u8b8a\u5f97\u7c21\u55ae\uff0c\u4f46\u5728\u66f4\u65b0\u6a39\u7d50\u69cb\u6642\u9700\u8981\u4fee\u6539\u591a\u500b\u7bc0\u9ede\u7684\u8def\u5f91\u3002<\/p>\n<pre><code>CREATE TABLE categories (\n    id INT PRIMARY KEY,\n    name VARCHAR(100),\n    path VARCHAR(255)\n);\n<\/code><\/pre>\n<h2 id=\"%e6%a8%b9%e7%8b%80%e7%b5%90%e6%a7%8b%e7%9a%84%e5%84%aa%e7%bc%ba%e9%bb%9e-nUyxirGnrC\">\u6a39\u72c0\u7d50\u69cb\u7684\u512a\u7f3a\u9ede<\/h2>\n<p>\u6bcf\u7a2e\u6a39\u72c0\u7d50\u69cb\u7684\u5b58\u5132\u65b9\u6cd5\u90fd\u6709\u5176\u512a\u7f3a\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u5d4c\u5957\u96c6\u6a21\u578b\uff1a<\/strong>\u67e5\u8a62\u6548\u7387\u9ad8\uff0c\u4f46\u63d2\u5165\u548c\u522a\u9664\u64cd\u4f5c\u8907\u96dc\u3002<\/li>\n<li><strong>\u9130\u63a5\u5217\u8868\u6a21\u578b\uff1a<\/strong>\u7d50\u69cb\u7c21\u55ae\uff0c\u6613\u65bc\u7406\u89e3\uff0c\u4f46\u67e5\u8a62\u6548\u7387\u8f03\u4f4e\u3002<\/li>\n<li><strong>\u8def\u5f91\u679a\u8209\u6a21\u578b\uff1a<\/strong>\u67e5\u8a62\u65b9\u4fbf\uff0c\u4f46\u66f4\u65b0\u64cd\u4f5c\u7e41\u7463\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-nUyxirGnrC\">\u7d50\u8ad6<\/h2>\n<p>\u6a39\u72c0\u7d50\u69cb\u5728\u6578\u64da\u5eab\u4e2d\u7684\u5b58\u5132\u65b9\u5f0f\u5404\u6709\u5343\u79cb\uff0c\u9078\u64c7\u5408\u9069\u7684\u5b58\u5132\u65b9\u6cd5\u53d6\u6c7a\u65bc\u5177\u9ad4\u7684\u61c9\u7528\u5834\u666f\u548c\u9700\u6c42\u3002\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u6839\u64da\u6578\u64da\u7684\u7279\u6027\u548c\u64cd\u4f5c\u7684\u983b\u7387\u4f86\u9078\u64c7\u6700\u5408\u9069\u7684\u6a39\u72c0\u7d50\u69cb\u5b58\u5132\u65b9\u5f0f\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u6709\u6548\u5730\u5b58\u5132\u6a39\u72c0\u7d50\u69cb\u6709\u9032\u4e00\u6b65\u7684\u8208\u8da3\uff0c\u6216\u662f\u9700\u8981\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> 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