{"id":152145,"date":"2024-11-01T20:29:20","date_gmt":"2024-11-01T12:29:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/152145\/"},"modified":"2024-11-01T20:29:21","modified_gmt":"2024-11-01T12:29:21","slug":"%e8%a1%a8%e5%96%ae%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%ef%bc%9a%e5%a6%82%e4%bd%95%e5%bf%ab%e9%80%9f%e9%ab%98%e6%95%88%e5%9c%b0%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a%ef%bc%9f-%e8%a1%a8%e5%96%ae","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/152145\/","title":{"rendered":"\u8868\u55ae\u6578\u64da\u5eab\u67e5\u8a62\uff1a\u5982\u4f55\u5feb\u901f\u9ad8\u6548\u5730\u67e5\u8a62\u6578\u64da\uff1f (\u8868\u55ae\u6578\u64da\u5eab\u67e5\u8a62)"},"content":{"rendered":"<h1 id=\"%e8%a1%a8%e5%96%ae%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%ef%bc%9a%e5%a6%82%e4%bd%95%e5%bf%ab%e9%80%9f%e9%ab%98%e6%95%88%e5%9c%b0%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a%ef%bc%9f-qrrWoVJVtC\">\u8868\u55ae\u6578\u64da\u5eab\u67e5\u8a62\uff1a\u5982\u4f55\u5feb\u901f\u9ad8\u6548\u5730\u67e5\u8a62\u6578\u64da\uff1f<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u8868\u55ae\u6578\u64da\u5eab\u67e5\u8a62\u6210\u70ba\u4e86\u8a31\u591a\u4f01\u696d\u548c\u958b\u767c\u8005\u65e5\u5e38\u5de5\u4f5c\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u7121\u8ad6\u662f\u7528\u65bc\u6536\u96c6\u7528\u6236\u53cd\u994b\u3001\u8a02\u55ae\u8655\u7406\u9084\u662f\u6578\u64da\u5206\u6790\uff0c\u5feb\u901f\u9ad8\u6548\u5730\u67e5\u8a62\u6578\u64da\u90fd\u662f\u63d0\u5347\u5de5\u4f5c\u6548\u7387\u7684\u95dc\u9375\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u6709\u6548\u5730\u9032\u884c\u8868\u55ae\u6578\u64da\u5eab\u67e5\u8a62\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u6280\u5de7\u548c\u7bc4\u4f8b\u3002<\/p>\n<h2 id=\"%e7%90%86%e8%a7%a3%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-qrrWoVJVtC\">\u7406\u89e3\u6578\u64da\u5eab\u67e5\u8a62\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u6578\u64da\u5eab\u67e5\u8a62\u662f\u6307\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u7279\u5b9a\u4fe1\u606f\u7684\u904e\u7a0b\u3002\u9019\u901a\u5e38\u901a\u904e\u4f7f\u7528\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff08SQL\uff09\u4f86\u5be6\u73fe\u3002SQL\u662f\u4e00\u7a2e\u6a19\u6e96\u7684\u6578\u64da\u5eab\u67e5\u8a62\u8a9e\u8a00\uff0c\u80fd\u5920\u8b93\u7528\u6236\u4ee5\u7c21\u55ae\u7684\u8a9e\u6cd5\u4f86\u9032\u884c\u6578\u64da\u7684\u63d2\u5165\u3001\u66f4\u65b0\u3001\u522a\u9664\u548c\u67e5\u8a62\u3002<\/p>\n<h3 id=\"%e5%9f%ba%e6%9c%ac%e7%9a%84sql%e6%9f%a5%e8%a9%a2%e8%aa%9e%e6%b3%95-qrrWoVJVtC\">\u57fa\u672c\u7684SQL\u67e5\u8a62\u8a9e\u6cd5<\/h3>\n<p>\u5728\u9032\u884c\u6578\u64da\u5eab\u67e5\u8a62\u6642\uff0c\u6700\u57fa\u672c\u7684SQL\u67e5\u8a62\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2 FROM table_name WHERE condition;<\/code><\/pre>\n<p>\u9019\u88e1\uff0c<code>SELECT<\/code>\u8a9e\u53e5\u7528\u65bc\u6307\u5b9a\u8981\u6aa2\u7d22\u7684\u5217\uff0c<code>FROM<\/code>\u8a9e\u53e5\u7528\u65bc\u6307\u5b9a\u6578\u64da\u4f86\u6e90\u7684\u8868\uff0c<code>WHERE<\/code>\u8a9e\u53e5\u5247\u7528\u65bc\u8a2d\u7f6e\u67e5\u8a62\u689d\u4ef6\u3002<\/p>\n<h2 id=\"%e6%8f%90%e9%ab%98%e6%9f%a5%e8%a9%a2%e6%95%88%e7%8e%87%e7%9a%84%e6%8a%80%e5%b7%a7-qrrWoVJVtC\">\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u7684\u6280\u5de7<\/h2>\n<p>\u5728\u9032\u884c\u8868\u55ae\u6578\u64da\u5eab\u67e5\u8a62\u6642\uff0c\u6548\u7387\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u7684\u6280\u5de7\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u7d22\u5f15\uff1a<\/strong>\u70ba\u7d93\u5e38\u67e5\u8a62\u7684\u5217\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002\u7d22\u5f15\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u80fd\u5920\u5e6b\u52a9\u6578\u64da\u5eab\u5feb\u901f\u5b9a\u4f4d\u5230\u6240\u9700\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u9650\u5236\u67e5\u8a62\u7d50\u679c\uff1a<\/strong>\u4f7f\u7528<code>LIMIT<\/code>\u8a9e\u53e5\u4f86\u9650\u5236\u67e5\u8a62\u7d50\u679c\u7684\u6578\u91cf\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u7684\u8ca0\u64d4\u3002<\/li>\n<li><strong>\u907f\u514d\u4f7f\u7528SELECT *\uff1a<\/strong>\u660e\u78ba\u6307\u5b9a\u9700\u8981\u7684\u5217\uff0c\u800c\u4e0d\u662f\u4f7f\u7528<code>SELECT *<\/code>\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u6aa2\u7d22\u3002<\/li>\n<li><strong>\u4f7f\u7528JOIN\u512a\u5316\u67e5\u8a62\uff1a<\/strong>\u7576\u9700\u8981\u5f9e\u591a\u500b\u8868\u4e2d\u6aa2\u7d22\u6578\u64da\u6642\uff0c\u4f7f\u7528<code>JOIN<\/code>\u8a9e\u53e5\u53ef\u4ee5\u6709\u6548\u5730\u5408\u4f75\u6578\u64da\uff0c\u6e1b\u5c11\u591a\u6b21\u67e5\u8a62\u7684\u958b\u92b7\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%af%84%e4%be%8b%ef%bc%9a%e4%bd%bf%e7%94%a8sql%e9%80%b2%e8%a1%8c%e9%ab%98%e6%95%88%e6%9f%a5%e8%a9%a2-qrrWoVJVtC\">\u7bc4\u4f8b\uff1a\u4f7f\u7528SQL\u9032\u884c\u9ad8\u6548\u67e5\u8a62<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528SQL\u9032\u884c\u9ad8\u6548\u7684\u6578\u64da\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT name, email FROM users WHERE status = 'active' LIMIT 10;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u5f9e<code>users<\/code>\u8868\u4e2d\u6aa2\u7d22\u6240\u6709\u72c0\u614b\u70ba\u201cactive\u201d\u7684\u7528\u6236\u7684\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\uff0c\u4e26\u9650\u5236\u7d50\u679c\u70ba10\u689d\u3002\u9019\u6a23\u7684\u67e5\u8a62\u4e0d\u50c5\u7c21\u6f54\u660e\u4e86\uff0c\u9084\u80fd\u6709\u6548\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-qrrWoVJVtC\">\u7d50\u8ad6<\/h2>\n<p>\u8868\u55ae\u6578\u64da\u5eab\u67e5\u8a62\u662f\u6578\u64da\u7ba1\u7406\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u7d44\u6210\u90e8\u5206\u3002\u901a\u904e\u7406\u89e3\u57fa\u672c\u7684SQL\u8a9e\u6cd5\u548c\u61c9\u7528\u4e00\u4e9b\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u7684\u6280\u5de7\uff0c\u958b\u767c\u8005\u548c\u4f01\u696d\u53ef\u4ee5\u66f4\u5feb\u901f\u5730\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\uff0c\u5f9e\u800c\u63d0\u5347\u5de5\u4f5c\u6548\u7387\u548c\u6c7a\u7b56\u80fd\u529b\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u6301\u7e8c\u512a\u5316\u67e5\u8a62\u65b9\u6cd5\u5c07\u6210\u70ba\u672a\u4f86\u7684\u91cd\u8981\u8da8\u52e2\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u9700\u6c42\u3002\u9019\u4e9b\u670d\u52d9\u80fd\u5920\u63d0\u4f9b\u7a69\u5b9a\u7684\u6027\u80fd\u548c\u9748\u6d3b\u7684\u64f4\u5c55\u6027\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u548c\u67e5\u8a62\u6578\u64da\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5feb\u901f\u9ad8\u6548\u5730\u67e5\u8a62\u8868\u55ae\u6578\u64da\u5eab\uff0c\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u6548\u7387\uff0c\u7c21\u5316\u5de5\u4f5c\u6d41\u7a0b\uff0c\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\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-152145","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152145","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=152145"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152145\/revisions"}],"predecessor-version":[{"id":152146,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152145\/revisions\/152146"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=152145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=152145"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=152145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}