{"id":194335,"date":"2024-11-13T05:48:20","date_gmt":"2024-11-12T21:48:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/194335\/"},"modified":"2024-11-13T05:48:22","modified_gmt":"2024-11-12T21:48:22","slug":"%e6%98%93%e8%aa%9e%e8%a8%80%e9%96%8b%e7%99%bc%e5%af%a6%e7%8f%be%e5%a4%9a%e7%b7%9a%e7%a8%8bsql%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-%e6%98%93%e8%aa%9e%e8%a8%80sql%e5%a4%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/194335\/","title":{"rendered":"\u6613\u8a9e\u8a00\u958b\u767c\u5be6\u73fe\u591a\u7dda\u7a0bSQL\u67e5\u8a62\u6578\u64da\u5eab\u9023\u63a5 (\u6613\u8a9e\u8a00sql\u591a\u7dda\u7a0b\u67e5\u8a62\u6578\u64da\u5eab\u9023\u63a5)"},"content":{"rendered":"<h1 id=\"%e6%98%93%e8%aa%9e%e8%a8%80%e9%96%8b%e7%99%bc%e5%af%a6%e7%8f%be%e5%a4%9a%e7%b7%9a%e7%a8%8bsql%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-IYNQwFcbYt\">\u6613\u8a9e\u8a00\u958b\u767c\u5be6\u73fe\u591a\u7dda\u7a0bSQL\u67e5\u8a62\u6578\u64da\u5eab\u9023\u63a5<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u8edf\u4ef6\u958b\u767c\u4e2d\uff0c\u591a\u7dda\u7a0b\u6280\u8853\u5df2\u6210\u70ba\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u6027\u80fd\u7684\u91cd\u8981\u624b\u6bb5\u3002\u7279\u5225\u662f\u5728\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u4f7f\u7528\u591a\u7dda\u7a0b\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u6e1b\u5c11\u7b49\u5f85\u6642\u9593\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728\u6613\u8a9e\u8a00\u4e2d\u5be6\u73fe\u591a\u7dda\u7a0bSQL\u67e5\u8a62\u6578\u64da\u5eab\u9023\u63a5\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e7%b7%9a%e7%a8%8b%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-IYNQwFcbYt\">\u591a\u7dda\u7a0b\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u591a\u7dda\u7a0b\u662f\u6307\u5728\u540c\u4e00\u9032\u7a0b\u4e2d\u540c\u6642\u904b\u884c\u591a\u500b\u7dda\u7a0b\u3002\u6bcf\u500b\u7dda\u7a0b\u53ef\u4ee5\u7368\u7acb\u57f7\u884c\u4efb\u52d9\uff0c\u9019\u6a23\u53ef\u4ee5\u5145\u5206\u5229\u7528CPU\u8cc7\u6e90\uff0c\u7279\u5225\u662f\u5728I\/O\u5bc6\u96c6\u578b\u64cd\u4f5c\u4e2d\uff0c\u5982\u6578\u64da\u5eab\u67e5\u8a62\u3002\u901a\u904e\u591a\u7dda\u7a0b\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5728\u4e00\u500b\u7dda\u7a0b\u4e2d\u767c\u9001\u67e5\u8a62\u8acb\u6c42\uff0c\u800c\u5728\u53e6\u4e00\u500b\u7dda\u7a0b\u4e2d\u8655\u7406\u5176\u4ed6\u4efb\u52d9\uff0c\u5f9e\u800c\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u97ff\u61c9\u901f\u5ea6\u3002<\/p>\n<h2 id=\"%e6%98%93%e8%aa%9e%e8%a8%80%e4%b8%ad%e7%9a%84%e5%a4%9a%e7%b7%9a%e7%a8%8b%e5%af%a6%e7%8f%be-IYNQwFcbYt\">\u6613\u8a9e\u8a00\u4e2d\u7684\u591a\u7dda\u7a0b\u5be6\u73fe<\/h2>\n<p>\u5728\u6613\u8a9e\u8a00\u4e2d\uff0c\u5be6\u73fe\u591a\u7dda\u7a0b\u7684\u65b9\u5f0f\u76f8\u5c0d\u7c21\u55ae\u3002\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528\u5167\u7f6e\u7684\u7dda\u7a0b\u529f\u80fd\u4f86\u5275\u5efa\u548c\u7ba1\u7406\u7dda\u7a0b\u3002\u4ee5\u4e0b\u662f\u5be6\u73fe\u591a\u7dda\u7a0bSQL\u67e5\u8a62\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e7%b7%9a%e7%a8%8b-IYNQwFcbYt\">1. \u5275\u5efa\u7dda\u7a0b<\/h3>\n<p>\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5275\u5efa\u4e00\u500b\u7dda\u7a0b\u4f86\u57f7\u884cSQL\u67e5\u8a62\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\u4f86\u5275\u5efa\u4e00\u500b\u65b0\u7684\u7dda\u7a0b\uff1a<\/p>\n<pre><code>\n\u7dda\u7a0b = \u65b0\u5efa(\u7dda\u7a0b\u985e\u578b)\n\u7dda\u7a0b.\u958b\u59cb()\n<\/code><\/pre>\n<h3 id=\"2-%e5%af%a6%e7%8f%be%e6%9f%a5%e8%a9%a2%e9%82%8f%e8%bc%af-IYNQwFcbYt\">2. \u5be6\u73fe\u67e5\u8a62\u908f\u8f2f<\/h3>\n<p>\u5728\u7dda\u7a0b\u4e2d\uff0c\u6211\u5011\u9700\u8981\u5be6\u73fe\u5177\u9ad4\u7684\u67e5\u8a62\u908f\u8f2f\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728\u7dda\u7a0b\u4e2d\u57f7\u884cSQL\u67e5\u8a62\uff1a<\/p>\n<pre><code>\n\u7dda\u7a0b\u985e\u578b = \u985e\u5225\n    \u65b9\u6cd5 \u57f7\u884c\u67e5\u8a62()\n        \u6578\u64da\u5eab\u9023\u63a5 = \u65b0\u5efa(\u6578\u64da\u5eab\u985e\u578b)\n        \u6578\u64da\u5eab\u9023\u63a5.\u6253\u958b(\"\u6578\u64da\u5eab\u9023\u63a5\u5b57\u7b26\u4e32\")\n        \u67e5\u8a62\u7d50\u679c = \u6578\u64da\u5eab\u9023\u63a5.\u57f7\u884c(\"SELECT * FROM \u8868\u540d\")\n        \u6578\u64da\u5eab\u9023\u63a5.\u95dc\u9589()\n        \u8fd4\u56de \u67e5\u8a62\u7d50\u679c\n    \u7d50\u675f\u65b9\u6cd5\n\u7d50\u675f\u985e\u5225\n<\/code><\/pre>\n<h3 id=\"3-%e8%99%95%e7%90%86%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c-IYNQwFcbYt\">3. \u8655\u7406\u67e5\u8a62\u7d50\u679c<\/h3>\n<p>\u67e5\u8a62\u5b8c\u6210\u5f8c\uff0c\u6211\u5011\u9700\u8981\u8655\u7406\u67e5\u8a62\u7d50\u679c\u3002\u53ef\u4ee5\u5728\u4e3b\u7dda\u7a0b\u4e2d\u63a5\u6536\u7d50\u679c\u4e26\u9032\u884c\u76f8\u61c9\u7684\u64cd\u4f5c\uff1a<\/p>\n<pre><code>\n\u7d50\u679c = \u7dda\u7a0b.\u57f7\u884c\u67e5\u8a62()\n\u5982\u679c \u7d50\u679c.\u6578\u91cf &gt; 0\n    \/\/ \u8655\u7406\u7d50\u679c\n\u7d50\u675f\u5982\u679c\n<\/code><\/pre>\n<h2 id=\"%e5%a4%9a%e7%b7%9a%e7%a8%8b%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%84%aa%e5%8b%a2-IYNQwFcbYt\">\u591a\u7dda\u7a0b\u67e5\u8a62\u7684\u512a\u52e2<\/h2>\n<p>\u4f7f\u7528\u591a\u7dda\u7a0b\u9032\u884cSQL\u67e5\u8a62\u6709\u591a\u500b\u512a\u52e2\uff1a<\/p>\n<ul>\n<li><strong>\u63d0\u9ad8\u6027\u80fd\uff1a<\/strong>\u591a\u7dda\u7a0b\u53ef\u4ee5\u540c\u6642\u8655\u7406\u591a\u500b\u67e5\u8a62\u8acb\u6c42\uff0c\u5f9e\u800c\u63d0\u9ad8\u6574\u9ad4\u6027\u80fd\u3002<\/li>\n<li><strong>\u6e1b\u5c11\u7b49\u5f85\u6642\u9593\uff1a<\/strong>\u7528\u6236\u5728\u767c\u9001\u67e5\u8a62\u8acb\u6c42\u5f8c\uff0c\u53ef\u4ee5\u7acb\u5373\u9032\u884c\u5176\u4ed6\u64cd\u4f5c\uff0c\u800c\u4e0d\u5fc5\u7b49\u5f85\u67e5\u8a62\u5b8c\u6210\u3002<\/li>\n<li><strong>\u8cc7\u6e90\u5229\u7528\u7387\u9ad8\uff1a<\/strong>\u591a\u7dda\u7a0b\u53ef\u4ee5\u5145\u5206\u5229\u7528\u7cfb\u7d71\u8cc7\u6e90\uff0c\u7279\u5225\u662f\u5728\u9ad8\u4e26\u767c\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-IYNQwFcbYt\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u5be6\u73fe\u591a\u7dda\u7a0bSQL\u67e5\u8a62\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u7dda\u7a0b\u5b89\u5168\uff1a<\/strong>\u78ba\u4fdd\u6578\u64da\u5eab\u64cd\u4f5c\u662f\u7dda\u7a0b\u5b89\u5168\u7684\uff0c\u907f\u514d\u6578\u64da\u7af6\u722d\u3002<\/li>\n<li><strong>\u8cc7\u6e90\u7ba1\u7406\uff1a<\/strong>\u53ca\u6642\u91cb\u653e\u8cc7\u6e90\uff0c\u907f\u514d\u5167\u5b58\u6cc4\u6f0f\u3002<\/li>\n<li><strong>\u932f\u8aa4\u8655\u7406\uff1a<\/strong>\u59a5\u5584\u8655\u7406\u67e5\u8a62\u904e\u7a0b\u4e2d\u7684\u7570\u5e38\u60c5\u6cc1\uff0c\u78ba\u4fdd\u61c9\u7528\u7a0b\u5e8f\u7a69\u5b9a\u904b\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-IYNQwFcbYt\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u6613\u8a9e\u8a00\u4e2d\u5be6\u73fe\u591a\u7dda\u7a0bSQL\u67e5\u8a62\u6578\u64da\u5eab\u9023\u63a5\u662f\u4e00\u500b\u6709\u6548\u7684\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u6027\u80fd\u7684\u65b9\u5f0f\u3002\u901a\u904e\u5408\u7406\u7684\u7dda\u7a0b\u7ba1\u7406\u548c\u67e5\u8a62\u908f\u8f2f\u8a2d\u8a08\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u986f\u8457\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6027\u80fd\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u7a69\u5b9a\u6027\u548c\u97ff\u61c9\u901f\u5ea6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6613\u8a9e\u8a00\u958b\u767c\u5be6\u73fe\u591a\u7dda\u7a0bSQL\u67e5\u8a62\u6578\u64da\u5eab\u9023\u63a5\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u7c21\u5316\u958b\u767c\u6d41\u7a0b\uff0c\u9069\u7528\u65bc\u9ad8\u6027\u80fd\u61c9\u7528\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-194335","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/194335","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=194335"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/194335\/revisions"}],"predecessor-version":[{"id":194336,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/194335\/revisions\/194336"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=194335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=194335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=194335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}