{"id":175517,"date":"2024-11-08T06:32:18","date_gmt":"2024-11-07T22:32:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175517\/"},"modified":"2024-11-08T06:32:19","modified_gmt":"2024-11-07T22:32:19","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e5%a4%9a%e5%80%8bwhere%e6%a2%9d%e4%bb%b6%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%abwhere%e6%a2%9d%e4%bb%b6%e5%a4%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175517\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528\u6578\u64da\u5eab\u4e2d\u7684\u591a\u500bwhere\u689d\u4ef6\uff1f (\u6578\u64da\u5eabwhere\u689d\u4ef6\u591a\u500b\u689d\u4ef6)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e5%a4%9a%e5%80%8bwhere%e6%a2%9d%e4%bb%b6%ef%bc%9f-rygVkDtCDO\">\u5982\u4f55\u4f7f\u7528\u6578\u64da\u5eab\u4e2d\u7684\u591a\u500bWHERE\u689d\u4ef6\uff1f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u67e5\u8a62\u4e2d\uff0c<code>WHERE<\/code>\u689d\u4ef6\u662f\u7528\u4f86\u904e\u6ffe\u6578\u64da\u7684\u91cd\u8981\u5de5\u5177\u3002\u7576\u6211\u5011\u9700\u8981\u6839\u64da\u591a\u500b\u689d\u4ef6\u4f86\u7be9\u9078\u6578\u64da\u6642\uff0c\u6b63\u78ba\u4f7f\u7528\u591a\u500b<code>WHERE<\/code>\u689d\u4ef6\u8b8a\u5f97\u5c24\u70ba\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728SQL\u67e5\u8a62\u4e2d\u6709\u6548\u5730\u4f7f\u7528\u591a\u500b<code>WHERE<\/code>\u689d\u4ef6\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-rygVkDtCDO\">\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728SQL\u4e2d\uff0c<code>WHERE<\/code>\u5b50\u53e5\u7528\u65bc\u6307\u5b9a\u67e5\u8a62\u4e2d\u8981\u6eff\u8db3\u7684\u689d\u4ef6\u3002\u7576\u9700\u8981\u6839\u64da\u591a\u500b\u689d\u4ef6\u904e\u6ffe\u6578\u64da\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528\u908f\u8f2f\u904b\u7b97\u7b26\uff0c\u5982<code>AND<\/code>\u548c<code>OR<\/code>\uff0c\u4f86\u7d44\u5408\u9019\u4e9b\u689d\u4ef6\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8and%e9%81%8b%e7%ae%97%e7%ac%a6-rygVkDtCDO\">\u4f7f\u7528AND\u904b\u7b97\u7b26<\/h2>\n<p>\u7576\u6211\u5011\u5e0c\u671b\u6240\u6709\u689d\u4ef6\u90fd\u5fc5\u9808\u6eff\u8db3\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528<code>AND<\/code>\u904b\u7b97\u7b26\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>employees<\/code>\u7684\u8868\u683c\uff0c\u4e26\u5e0c\u671b\u67e5\u8a62\u6240\u6709\u5728\u201c\u92b7\u552e\u90e8\u9580\u201d\u5de5\u4f5c\u7684\u5e74\u9f61\u5927\u65bc30\u6b72\u7684\u54e1\u5de5\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nWHERE department = 'Sales' AND age &gt; 30;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u53ea\u6709\u7576\u54e1\u5de5\u7684\u90e8\u9580\u662f\u201c\u92b7\u552e\u90e8\u9580\u201d\u4e14\u5e74\u9f61\u5927\u65bc30\u6b72\u6642\uff0c\u8a72\u54e1\u5de5\u7684\u8a18\u9304\u624d\u6703\u88ab\u9078\u4e2d\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8or%e9%81%8b%e7%ae%97%e7%ac%a6-rygVkDtCDO\">\u4f7f\u7528OR\u904b\u7b97\u7b26<\/h2>\n<p>\u5982\u679c\u6211\u5011\u5e0c\u671b\u6eff\u8db3\u4efb\u4e00\u689d\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528<code>OR<\/code>\u904b\u7b97\u7b26\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u60f3\u67e5\u8a62\u6240\u6709\u5728\u201c\u92b7\u552e\u90e8\u9580\u201d\u6216\u201c\u5e02\u5834\u90e8\u9580\u201d\u5de5\u4f5c\u7684\u54e1\u5de5\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nWHERE department = 'Sales' OR department = 'Marketing';<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u5728\u201c\u92b7\u552e\u90e8\u9580\u201d\u6216\u201c\u5e02\u5834\u90e8\u9580\u201d\u5de5\u4f5c\u7684\u54e1\u5de5\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e7%b5%84%e5%90%88%e4%bd%bf%e7%94%a8and%e5%92%8cor-rygVkDtCDO\">\u7d44\u5408\u4f7f\u7528AND\u548cOR<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u6211\u5011\u7d93\u5e38\u9700\u8981\u540c\u6642\u4f7f\u7528<code>AND<\/code>\u548c<code>OR<\/code>\u3002\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u62ec\u865f\u4f86\u660e\u78ba\u689d\u4ef6\u7684\u512a\u5148\u9806\u5e8f\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u60f3\u67e5\u8a62\u6240\u6709\u5e74\u9f61\u5927\u65bc30\u6b72\u7684\u201c\u92b7\u552e\u90e8\u9580\u201d\u54e1\u5de5\uff0c\u6216\u8005\u5e74\u9f61\u5c0f\u65bc25\u6b72\u7684\u201c\u5e02\u5834\u90e8\u9580\u201d\u54e1\u5de5\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nWHERE (department = 'Sales' AND age &gt; 30)\nOR (department = 'Marketing' AND age &lt; 25);<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u8fd4\u56de\u7b26\u5408\u4efb\u4e00\u7d44\u689d\u4ef6\u7684\u54e1\u5de5\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8in%e5%92%8cbetween-rygVkDtCDO\">\u4f7f\u7528IN\u548cBETWEEN<\/h2>\n<p>\u9664\u4e86<code>AND<\/code>\u548c<code>OR<\/code>\uff0cSQL\u9084\u63d0\u4f9b\u4e86\u5176\u4ed6\u6709\u7528\u7684\u689d\u4ef6\u904e\u6ffe\u65b9\u5f0f\u3002\u4f8b\u5982\uff0c<code>IN<\/code>\u904b\u7b97\u7b26\u53ef\u4ee5\u7528\u4f86\u6aa2\u67e5\u67d0\u500b\u503c\u662f\u5426\u5728\u4e00\u7d44\u503c\u4e2d\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nWHERE department IN ('Sales', 'Marketing') AND age &gt; 30;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u5728\u201c\u92b7\u552e\u90e8\u9580\u201d\u6216\u201c\u5e02\u5834\u90e8\u9580\u201d\u5de5\u4f5c\u7684\u5e74\u9f61\u5927\u65bc30\u6b72\u7684\u54e1\u5de5\u3002<\/p>\n<p>\u6b64\u5916\uff0c<code>BETWEEN<\/code>\u904b\u7b97\u7b26\u53ef\u4ee5\u7528\u4f86\u67e5\u8a62\u67d0\u500b\u7bc4\u570d\u5167\u7684\u503c\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nWHERE age BETWEEN 25 AND 35;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u6240\u6709\u5e74\u9f61\u572825\u523035\u6b72\u4e4b\u9593\u7684\u54e1\u5de5\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-rygVkDtCDO\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<ul>\n<li>\u59cb\u7d42\u4f7f\u7528\u62ec\u865f\u4f86\u660e\u78ba\u689d\u4ef6\u7684\u512a\u5148\u9806\u5e8f\uff0c\u7279\u5225\u662f\u5728\u7d44\u5408\u4f7f\u7528<code>AND<\/code>\u548c<code>OR<\/code>\u6642\u3002<\/li>\n<li>\u907f\u514d\u5728<code>WHERE<\/code>\u5b50\u53e5\u4e2d\u4f7f\u7528\u904e\u591a\u7684\u689d\u4ef6\uff0c\u9019\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li>\u4f7f\u7528\u7d22\u5f15\u4f86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u5927\u578b\u6578\u64da\u96c6\u4e0a\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-rygVkDtCDO\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u67e5\u8a62\u4e2d\uff0c\u6b63\u78ba\u4f7f\u7528\u591a\u500b<code>WHERE<\/code>\u689d\u4ef6\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u901a\u904e\u4f7f\u7528<code>AND<\/code>\u3001<code>OR<\/code>\u3001<code>IN<\/code>\u548c<code>BETWEEN<\/code>\u7b49\u904b\u7b97\u7b26\uff0c\u6211\u5011\u53ef\u4ee5\u9748\u6d3b\u5730\u7be9\u9078\u51fa\u6240\u9700\u7684\u6578\u64da\u3002\u9019\u4e9b\u6280\u5de7\u4e0d\u50c5\u80fd\u63d0\u9ad8\u67e5\u8a62\u7684\u6e96\u78ba\u6027\uff0c\u9084\u80fd\u63d0\u5347\u6027\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684<code>VPS<\/code>\u89e3\u6c7a\u65b9\u6848\uff0c\u5982<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\uff0c\u53ef\u4ee5\u70ba\u60a8\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728\u6578\u64da\u5eab\u67e5\u8a62\u4e2d\u4f7f\u7528\u591a\u500bWHERE\u689d\u4ef6\uff0c\u63d0\u5347\u6578\u64da\u7be9\u9078\u6548\u7387\uff0c\u7372\u53d6\u7cbe\u78ba\u7d50\u679c\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-175517","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175517","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=175517"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175517\/revisions"}],"predecessor-version":[{"id":175518,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175517\/revisions\/175518"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}