{"id":152791,"date":"2024-11-02T02:03:19","date_gmt":"2024-11-01T18:03:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/152791\/"},"modified":"2024-11-02T02:03:19","modified_gmt":"2024-11-01T18:03:19","slug":"%e8%b6%85%e5%85%a8%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e5%bb%ba%e8%a1%a8-sql-%e7%b4%a2%e5%bc%95%e8%a6%8f%e7%af%84%ef%bc%8c%e5%bb%ba%e8%ad%b0%e6%89%93%e5%8d%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/152791\/","title":{"rendered":"\u8d85\u5168\u7684\u6578\u64da\u5eab\u5efa\u8868\/SQL\/\u7d22\u5f15\u898f\u7bc4\uff0c\u5efa\u8b70\u6253\u5370"},"content":{"rendered":"<h1 id=\"%e8%b6%85%e5%85%a8%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e5%bb%ba%e8%a1%a8-sql-%e7%b4%a2%e5%bc%95%e8%a6%8f%e7%af%84%ef%bc%8c%e5%bb%ba%e8%ad%b0%e6%89%93%e5%8d%b0-OdaJnYxnCS\">\u8d85\u5168\u7684\u6578\u64da\u5eab\u5efa\u8868\/SQL\/\u7d22\u5f15\u898f\u7bc4\uff0c\u5efa\u8b70\u6253\u5370<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u8a2d\u8a08\u548c\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u61c9\u7528\u9084\u662f\u5927\u578b\u4f01\u696d\u7cfb\u7d71\uff0c\u826f\u597d\u7684\u6578\u64da\u5eab\u7d50\u69cb\u90fd\u80fd\u986f\u8457\u63d0\u9ad8\u6027\u80fd\u548c\u53ef\u7dad\u8b77\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6578\u64da\u5eab\u5efa\u8868\u3001SQL\u8a9e\u53e5\u53ca\u7d22\u5f15\u7684\u6700\u4f73\u5be6\u8e10\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5efa\u8b70\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\u9075\u5faa\u898f\u7bc4\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%bb%ba%e8%a1%a8%e8%a6%8f%e7%af%84-OdaJnYxnCS\">\u6578\u64da\u5eab\u5efa\u8868\u898f\u7bc4<\/h2>\n<p>\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u8868\u6642\uff0c\u9075\u5faa\u4e00\u5b9a\u7684\u898f\u7bc4\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u67e5\u8a62\u6548\u7387\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u547d\u540d\u898f\u5247\uff1a<\/strong>\u8868\u540d\u548c\u5b57\u6bb5\u540d\u61c9\u8a72\u5177\u6709\u63cf\u8ff0\u6027\uff0c\u4e26\u9075\u5faa\u4e00\u81f4\u7684\u547d\u540d\u898f\u5247\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u5c0f\u5beb\u5b57\u6bcd\u548c\u4e0b\u5283\u7dda\u5206\u9694\u55ae\u8a5e\uff08\u5982\uff1auser_profile\uff09\u3002<\/li>\n<li><strong>\u4e3b\u9375\u8a2d\u8a08\uff1a<\/strong>\u6bcf\u500b\u8868\u61c9\u8a72\u6709\u4e00\u500b\u4e3b\u9375\uff0c\u4ee5\u552f\u4e00\u6a19\u8b58\u6bcf\u4e00\u884c\u6578\u64da\u3002\u901a\u5e38\u4f7f\u7528\u81ea\u589e\u6574\u6578\u6216UUID\u4f5c\u70ba\u4e3b\u9375\u3002<\/li>\n<li><strong>\u6578\u64da\u985e\u578b\u9078\u64c7\uff1a<\/strong>\u6839\u64da\u5be6\u969b\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\uff0c\u907f\u514d\u4f7f\u7528\u904e\u5927\u7684\u6578\u64da\u985e\u578b\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\uff0c\u4f7f\u7528VARCHAR(255)\u5373\u53ef\u3002<\/li>\n<li><strong>\u5916\u9375\u7d04\u675f\uff1a<\/strong>\u4f7f\u7528\u5916\u9375\u4f86\u7dad\u8b77\u8868\u4e4b\u9593\u7684\u95dc\u806f\u6027\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h3 id=\"%e5%bb%ba%e8%a1%a8%e7%af%84%e4%be%8b-OdaJnYxnCS\">\u5efa\u8868\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE TABLE user_profile (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    username VARCHAR(50) NOT NULL,\n    email VARCHAR(255) NOT NULL UNIQUE,\n    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP\n);<\/code><\/pre>\n<h2 id=\"sql%e8%aa%9e%e5%8f%a5%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-OdaJnYxnCS\">SQL\u8a9e\u53e5\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u64b0\u5bebSQL\u8a9e\u53e5\u6642\uff0c\u61c9\u9075\u5faa\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u548c\u53ef\u8b80\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528JOIN\u800c\u975e\u5b50\u67e5\u8a62\uff1a<\/strong>\u5728\u9700\u8981\u5f9e\u591a\u500b\u8868\u4e2d\u6aa2\u7d22\u6578\u64da\u6642\uff0c\u4f7f\u7528JOIN\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ul>\n<pre><code>SELECT u.username, p.post_title\nFROM users u\nJOIN posts p ON u.id = p.user_id;<\/code><\/pre>\n<li><strong>\u907f\u514dSELECT *\uff1a<\/strong>\u660e\u78ba\u6307\u5b9a\u9700\u8981\u7684\u5b57\u6bb5\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u91cf\uff0c\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<li><strong>\u4f7f\u7528\u7d22\u5f15\uff1a<\/strong>\u5c0d\u65bc\u7d93\u5e38\u67e5\u8a62\u7684\u5b57\u6bb5\uff0c\u61c9\u8003\u616e\u5efa\u7acb\u7d22\u5f15\uff0c\u4ee5\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e4%bd%bf%e7%94%a8%e8%88%87%e7%ae%a1%e7%90%86-OdaJnYxnCS\">\u7d22\u5f15\u7684\u4f7f\u7528\u8207\u7ba1\u7406<\/h2>\n<p>\u7d22\u5f15\u662f\u63d0\u9ad8\u6578\u64da\u5eab\u67e5\u8a62\u6027\u80fd\u7684\u91cd\u8981\u5de5\u5177\uff0c\u4f46\u4e0d\u7576\u4f7f\u7528\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u7d22\u5f15\u7684\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li><strong>\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\uff1a<\/strong>\u6839\u64da\u67e5\u8a62\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\uff0c\u5982B\u6a39\u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u7b49\u3002<\/li>\n<li><strong>\u907f\u514d\u904e\u591a\u7d22\u5f15\uff1a<\/strong>\u6bcf\u500b\u7d22\u5f15\u90fd\u6703\u4f54\u7528\u984d\u5916\u7684\u5b58\u5132\u7a7a\u9593\uff0c\u4e26\u5f71\u97ff\u5beb\u5165\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u5efa\u7acb\u7d22\u5f15\u3002<\/li>\n<li><strong>\u5b9a\u671f\u91cd\u5efa\u7d22\u5f15\uff1a<\/strong>\u96a8\u8457\u6578\u64da\u7684\u589e\u9577\uff0c\u7d22\u5f15\u53ef\u80fd\u6703\u8b8a\u5f97\u4e0d\u518d\u9ad8\u6548\uff0c\u5b9a\u671f\u91cd\u5efa\u7d22\u5f15\u53ef\u4ee5\u4fdd\u6301\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%b4%a2%e5%bc%95%e7%af%84%e4%be%8b-OdaJnYxnCS\">\u7d22\u5f15\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE INDEX idx_username ON user_profile(username);<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-OdaJnYxnCS\">\u7e3d\u7d50<\/h2>\n<p>\u826f\u597d\u7684\u6578\u64da\u5eab\u8a2d\u8a08\u548c\u7ba1\u7406\u662f\u78ba\u4fdd\u61c9\u7528\u7a0b\u5e8f\u6027\u80fd\u548c\u53ef\u64f4\u5c55\u6027\u7684\u57fa\u790e\u3002\u9075\u5faa\u4e0a\u8ff0\u5efa\u8868\u3001SQL\u8a9e\u53e5\u53ca\u7d22\u5f15\u7684\u6700\u4f73\u5be6\u8e10\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u69cb\u5efa\u9ad8\u6548\u3001\u53ef\u7dad\u8b77\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6027\u80fd\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u5728\u904b\u884c\u904e\u7a0b\u4e2d\u7372\u5f97\u6700\u4f73\u7684\u652f\u6301\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8d85\u5168\u7684\u6578\u64da\u5eab\u5efa\u8868\u3001SQL\u548c\u7d22\u5f15\u898f\u7bc4\u6307\u5357\uff0c\u9069\u5408\u6253\u5370\uff0c\u52a9\u60a8\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\u8207\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-152791","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=152791"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152791\/revisions"}],"predecessor-version":[{"id":152792,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152791\/revisions\/152792"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=152791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=152791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=152791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}