{"id":80341,"date":"2024-10-16T14:12:16","date_gmt":"2024-10-16T06:12:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/80341\/"},"modified":"2024-10-16T14:12:16","modified_gmt":"2024-10-16T06:12:16","slug":"mysql%e4%b8%adwhere%e5%be%8c%e8%b7%9f%e8%91%97n%e5%80%8bor%e6%a2%9d%e4%bb%b6%e6%9c%83%e6%80%8e%e6%a8%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/80341\/","title":{"rendered":"MySQL\u4e2dWHERE\u5f8c\u8ddf\u8457N\u500bOR\u689d\u4ef6\u6703\u600e\u6a23&#8230;"},"content":{"rendered":"<h1 id=\"mysql%e4%b8%adwhere%e5%be%8c%e8%b7%9f%e8%91%97n%e5%80%8bor%e6%a2%9d%e4%bb%b6%e6%9c%83%e6%80%8e%e6%a8%a3-QtLEdbxOOR\">MySQL\u4e2dWHERE\u5f8c\u8ddf\u8457N\u500bOR\u689d\u4ef6\u6703\u600e\u6a23<\/h1>\n<p>\u5728\u4f7f\u7528MySQL\u9032\u884c\u6578\u64da\u67e5\u8a62\u6642\uff0c<code>WHERE<\/code>\u5b50\u53e5\u662f\u7528\u4f86\u904e\u6ffe\u7d50\u679c\u96c6\u7684\u91cd\u8981\u5de5\u5177\u3002\u7576\u6211\u5011\u9700\u8981\u6839\u64da\u591a\u500b\u689d\u4ef6\u4f86\u7be9\u9078\u6578\u64da\u6642\uff0c<code>OR<\/code>\u904b\u7b97\u7b26\u4fbf\u6210\u70ba\u4e86\u4e0d\u53ef\u6216\u7f3a\u7684\u90e8\u5206\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728MySQL\u4e2d\u4f7f\u7528<code>WHERE<\/code>\u5f8c\u8ddf\u96a8N\u500b<code>OR<\/code>\u689d\u4ef6\u7684\u60c5\u6cc1\uff0c\u4ee5\u53ca\u9019\u6a23\u505a\u53ef\u80fd\u5e36\u4f86\u7684\u5f71\u97ff\u548c\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-QtLEdbxOOR\">\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c<code>WHERE<\/code>\u5b50\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2, ...\nFROM table_name\nWHERE condition1 OR condition2 OR ... OR conditionN;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>employees<\/code>\u7684\u8868\u683c\uff0c\u5305\u542b\u54e1\u5de5\u7684\u59d3\u540d\u548c\u90e8\u9580\u3002\u6211\u5011\u60f3\u8981\u67e5\u8a62\u5c6c\u65bc\u300c\u92b7\u552e\u90e8\u300d\u6216\u300c\u5e02\u5834\u90e8\u300d\u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT name\nFROM employees\nWHERE department = 'Sales' OR department = 'Marketing';<\/code><\/pre>\n<h2 id=\"n%e5%80%8bor%e6%a2%9d%e4%bb%b6%e7%9a%84%e5%bd%b1%e9%9f%bf-QtLEdbxOOR\">N\u500bOR\u689d\u4ef6\u7684\u5f71\u97ff<\/h2>\n<p>\u7576<code>WHERE<\/code>\u5b50\u53e5\u5f8c\u9762\u8ddf\u96a8\u591a\u500b<code>OR<\/code>\u689d\u4ef6\u6642\uff0cMySQL\u6703\u5c0d\u6bcf\u500b\u689d\u4ef6\u9032\u884c\u8a55\u4f30\u3002\u9019\u610f\u5473\u8457\uff0c\u5982\u679c\u6709N\u500b<code>OR<\/code>\u689d\u4ef6\uff0c\u6578\u64da\u5eab\u5c07\u6aa2\u67e5\u6bcf\u4e00\u500b\u689d\u4ef6\uff0c\u76f4\u5230\u627e\u5230\u7b26\u5408\u7684\u7d50\u679c\u6216\u6aa2\u67e5\u5b8c\u6240\u6709\u689d\u4ef6\u70ba\u6b62\u3002\u9019\u6a23\u7684\u67e5\u8a62\u5728\u6578\u64da\u91cf\u8f03\u5927\u6642\uff0c\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002<\/p>\n<h3 id=\"%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-QtLEdbxOOR\">\u6027\u80fd\u8003\u91cf<\/h3>\n<p>\u4f7f\u7528\u591a\u500b<code>OR<\/code>\u689d\u4ef6\u53ef\u80fd\u6703\u5c0e\u81f4\u67e5\u8a62\u6548\u7387\u4e0b\u964d\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u8868\u4e2d\u6709\u5927\u91cf\u8a18\u9304\u7684\u60c5\u6cc1\u4e0b\u3002\u9019\u662f\u56e0\u70ba\u6578\u64da\u5eab\u9700\u8981\u5c0d\u6bcf\u4e00\u689d\u8a18\u9304\u9032\u884c\u8a55\u4f30\uff0c\u9019\u6a23\u6703\u589e\u52a0CPU\u7684\u8ca0\u64d4\u3002\u70ba\u4e86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528IN\u904b\u7b97\u7b26\uff1a<\/strong>\u5982\u679c\u6709\u591a\u500b\u76f8\u540c\u5b57\u6bb5\u7684\u689d\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528<code>IN<\/code>\u904b\u7b97\u7b26\u4f86\u7c21\u5316\u67e5\u8a62\u3002\u4f8b\u5982\uff1a<\/li>\n<pre><code>SELECT name\nFROM employees\nWHERE department IN ('Sales', 'Marketing');<\/code><\/pre>\n<li><strong>\u7d22\u5f15\uff1a<\/strong>\u78ba\u4fdd\u5728\u67e5\u8a62\u7684\u5b57\u6bb5\u4e0a\u5efa\u7acb\u7d22\u5f15\uff0c\u9019\u6a23\u53ef\u4ee5\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002<\/li>\n<li><strong>\u5206\u89e3\u67e5\u8a62\uff1a<\/strong>\u5982\u679c\u53ef\u80fd\uff0c\u53ef\u4ee5\u5c07\u8907\u96dc\u7684\u67e5\u8a62\u5206\u89e3\u70ba\u591a\u500b\u7c21\u55ae\u7684\u67e5\u8a62\uff0c\u7136\u5f8c\u518d\u5408\u4f75\u7d50\u679c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%a1%88%e4%be%8b-QtLEdbxOOR\">\u5be6\u969b\u6848\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5305\u542b\u6578\u5343\u689d\u8a18\u9304\u7684<code>products<\/code>\u8868\u683c\uff0c\u6211\u5011\u60f3\u8981\u67e5\u8a62\u5c6c\u65bc\u300c\u96fb\u5b50\u7522\u54c1\u300d\u3001\u300c\u5bb6\u5c45\u7528\u54c1\u300d\u6216\u300c\u66f8\u7c4d\u300d\u7684\u7522\u54c1\u3002\u4f7f\u7528<code>OR<\/code>\u7684\u67e5\u8a62\u53ef\u80fd\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT product_name\nFROM products\nWHERE category = 'Electronics' OR category = 'Home Goods' OR category = 'Books';<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5728\u6578\u64da\u91cf\u8f03\u5927\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u554f\u984c\u3002\u4f7f\u7528<code>IN<\/code>\u904b\u7b97\u7b26\u53ef\u4ee5\u66f4\u6709\u6548\u7387\uff1a<\/p>\n<pre><code>SELECT product_name\nFROM products\nWHERE category IN ('Electronics', 'Home Goods', 'Books');<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-QtLEdbxOOR\">\u7d50\u8ad6<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u4f7f\u7528<code>WHERE<\/code>\u5f8c\u8ddf\u96a8N\u500b<code>OR<\/code>\u689d\u4ef6\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u67e5\u8a62\u65b9\u5f0f\uff0c\u4f46\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002\u901a\u904e\u4f7f\u7528<code>IN<\/code>\u904b\u7b97\u7b26\u3001\u5efa\u7acb\u7d22\u5f15\u548c\u5206\u89e3\u67e5\u8a62\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u4e86\u89e3\u9019\u4e9b\u6700\u4f73\u5be6\u8e10\u5c07\u6709\u52a9\u65bc\u958b\u767c\u8005\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u67e5\u8a62\u6642\u505a\u51fa\u66f4\u660e\u667a\u7684\u9078\u64c7\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-QtLEdbxOOR\">\u7e3d\u7d50<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c<code>WHERE<\/code>\u5f8c\u8ddf\u96a8\u591a\u500b<code>OR<\/code>\u689d\u4ef6\u7684\u67e5\u8a62\u65b9\u5f0f\u96d6\u7136\u9748\u6d3b\uff0c\u4f46\u5728\u6027\u80fd\u4e0a\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\u3002\u70ba\u4e86\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u5efa\u8b70\u4f7f\u7528<code>IN<\/code>\u904b\u7b97\u7b26\u548c\u9069\u7576\u7684\u7d22\u5f15\u3002\u82e5\u60a8\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\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<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728MySQL\u4e2d\uff0c\u4f7f\u7528WHERE\u5f8c\u8ddf\u591a\u500bOR\u689d\u4ef6\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\uff0c\u53ef\u80fd\u5c0e\u81f4\u5168\u8868\u6383\u63cf\uff0c\u5efa\u8b70\u512a\u5316\u67e5\u8a62\u4ee5\u63d0\u9ad8\u6548\u7387\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-80341","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80341","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=80341"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80341\/revisions"}],"predecessor-version":[{"id":80342,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80341\/revisions\/80342"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=80341"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=80341"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=80341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}