{"id":181386,"date":"2024-11-09T16:37:19","date_gmt":"2024-11-09T08:37:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/181386\/"},"modified":"2024-11-09T16:37:20","modified_gmt":"2024-11-09T08:37:20","slug":"%e6%b7%b1%e5%85%a5%e6%b7%ba%e5%87%bamysql%e6%95%b8%e6%93%9a%e5%ba%abor%e6%9f%a5%e8%a9%a2%e6%8a%80%e5%b7%a7%ef%bc%88mysql%e6%95%b8%e6%93%9a%e5%ba%abor%e6%9f%a5%e8%a9%a2%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/181386\/","title":{"rendered":"\u6df1\u5165\u6dfa\u51faMySQL\u6578\u64da\u5eabOR\u67e5\u8a62\u6280\u5de7\uff08mysql\u6578\u64da\u5eabor\u67e5\u8a62\uff09"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%85%a5%e6%b7%ba%e5%87%bamysql%e6%95%b8%e6%93%9a%e5%ba%abor%e6%9f%a5%e8%a9%a2%e6%8a%80%e5%b7%a7-JOkQNMkMOH\">\u6df1\u5165\u6dfa\u51faMySQL\u6578\u64da\u5eabOR\u67e5\u8a62\u6280\u5de7<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u6578\u64da\u5eab\uff0c\u56e0\u5176\u9ad8\u6548\u80fd\u548c\u9748\u6d3b\u6027\u800c\u53d7\u5230\u958b\u767c\u8005\u7684\u9752\u775e\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u4e2d\u7684OR\u67e5\u8a62\u6280\u5de7\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u9032\u884c\u6709\u6548\u7684\u67e5\u8a62\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afor%e6%9f%a5%e8%a9%a2%ef%bc%9f-JOkQNMkMOH\">\u4ec0\u9ebc\u662fOR\u67e5\u8a62\uff1f<\/h2>\n<p>\u5728SQL\u4e2d\uff0cOR\u662f\u4e00\u500b\u908f\u8f2f\u904b\u7b97\u7b26\uff0c\u7528\u65bc\u5728\u67e5\u8a62\u4e2d\u6307\u5b9a\u591a\u500b\u689d\u4ef6\u3002\u7576\u4f7f\u7528OR\u904b\u7b97\u7b26\u6642\uff0c\u53ea\u8981\u6eff\u8db3\u5176\u4e2d\u4e00\u500b\u689d\u4ef6\uff0c\u67e5\u8a62\u5c31\u6703\u8fd4\u56de\u76f8\u61c9\u7684\u7d50\u679c\u3002\u9019\u4f7f\u5f97OR\u67e5\u8a62\u5728\u9700\u8981\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u591a\u7a2e\u53ef\u80fd\u6027\u6642\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-JOkQNMkMOH\">\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>OR\u67e5\u8a62\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2, ...\nFROM table_name\nWHERE condition1 OR condition2;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cemployees\u201d\u7684\u8868\u683c\uff0c\u5305\u542b\u201cname\u201d\u548c\u201cdepartment\u201d\u5169\u500b\u6b04\u4f4d\u3002\u5982\u679c\u6211\u5011\u60f3\u67e5\u8a62\u6240\u6709\u5728\u201cSales\u201d\u6216\u201cMarketing\u201d\u90e8\u9580\u5de5\u4f5c\u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT name\nFROM employees\nWHERE department = 'Sales' OR department = 'Marketing';<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8or%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%af%a6%e9%9a%9b%e6%a1%88%e4%be%8b-JOkQNMkMOH\">\u4f7f\u7528OR\u67e5\u8a62\u7684\u5be6\u969b\u6848\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528OR\u67e5\u8a62\u7684\u5be6\u969b\u6848\u4f8b\uff1a<\/p>\n<h3 id=\"%e6%a1%88%e4%be%8b%e4%b8%80%ef%bc%9a%e6%9f%a5%e8%a9%a2%e5%a4%9a%e5%80%8b%e6%a2%9d%e4%bb%b6-JOkQNMkMOH\">\u6848\u4f8b\u4e00\uff1a\u67e5\u8a62\u591a\u500b\u689d\u4ef6<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u201cproducts\u201d\u8868\u683c\uff0c\u5305\u542b\u201cproduct_name\u201d\u548c\u201ccategory\u201d\u6b04\u4f4d\u3002\u5982\u679c\u6211\u5011\u60f3\u67e5\u8a62\u6240\u6709\u5c6c\u65bc\u201cElectronics\u201d\u6216\u201cFurniture\u201d\u985e\u5225\u7684\u7522\u54c1\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT product_name\nFROM products\nWHERE category = 'Electronics' OR category = 'Furniture';<\/code><\/pre>\n<h3 id=\"%e6%a1%88%e4%be%8b%e4%ba%8c%ef%bc%9a%e7%b5%90%e5%90%88and%e5%92%8cor-JOkQNMkMOH\">\u6848\u4f8b\u4e8c\uff1a\u7d50\u5408AND\u548cOR<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u540c\u6642\u4f7f\u7528AND\u548cOR\u904b\u7b97\u7b26\u3002\u9019\u6642\uff0c\u6211\u5011\u9700\u8981\u4f7f\u7528\u62ec\u865f\u4f86\u78ba\u4fdd\u67e5\u8a62\u7684\u6b63\u78ba\u6027\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u60f3\u67e5\u8a62\u6240\u6709\u5728\u201cSales\u201d\u90e8\u9580\u5de5\u4f5c\u7684\u54e1\u5de5\uff0c\u6216\u8005\u5728\u201cMarketing\u201d\u90e8\u9580\u5de5\u4f5c\u7684\u54e1\u5de5\uff0c\u4e14\u5e74\u9f61\u5927\u65bc30\u6b72\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT name\nFROM employees\nWHERE (department = 'Sales') OR (department = 'Marketing' AND age &gt; 30);<\/code><\/pre>\n<h2 id=\"%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-JOkQNMkMOH\">\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u96d6\u7136OR\u67e5\u8a62\u975e\u5e38\u9748\u6d3b\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\u3002\u7576\u6578\u64da\u91cf\u9f90\u5927\u6642\uff0cOR\u904b\u7b97\u7b26\u53ef\u80fd\u6703\u5c0e\u81f4\u5168\u8868\u6383\u63cf\uff0c\u5f9e\u800c\u964d\u4f4e\u67e5\u8a62\u6548\u7387\u3002\u70ba\u4e86\u63d0\u9ad8\u6027\u80fd\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u7d22\u5f15\uff1a\u78ba\u4fdd\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u6b04\u4f4d\u4e0a\u5efa\u7acb\u7d22\u5f15\uff0c\u4ee5\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002<\/li>\n<li>\u9650\u5236\u8fd4\u56de\u7684\u884c\u6578\uff1a\u4f7f\u7528LIMIT\u5b50\u53e5\u4f86\u9650\u5236\u67e5\u8a62\u7d50\u679c\u7684\u884c\u6578\u3002<\/li>\n<li>\u8003\u616e\u4f7f\u7528UNION\uff1a\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528UNION\u4f86\u5408\u4f75\u591a\u500b\u67e5\u8a62\u53ef\u80fd\u6703\u6bd4\u4f7f\u7528OR\u66f4\u6709\u6548\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-JOkQNMkMOH\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u4e2d\u7684OR\u67e5\u8a62\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u591a\u7a2e\u53ef\u80fd\u7684\u7d50\u679c\u3002\u901a\u904e\u9748\u6d3b\u904b\u7528OR\u904b\u7b97\u7b26\uff0c\u4e26\u7d50\u5408AND\u904b\u7b97\u7b26\uff0c\u6211\u5011\u53ef\u4ee5\u69cb\u5efa\u51fa\u8907\u96dc\u7684\u67e5\u8a62\u4f86\u6eff\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002\u7136\u800c\uff0c\u5728\u4f7f\u7528OR\u67e5\u8a62\u6642\uff0c\u4e5f\u9700\u8981\u8003\u616e\u6027\u80fd\u554f\u984c\uff0c\u4e26\u63a1\u53d6\u76f8\u61c9\u7684\u512a\u5316\u63aa\u65bd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u7121\u8ad6\u662f\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u4e86\u89e3MySQL\u7684\u67e5\u8a62\u6280\u5de7\u5c07\u5c0d\u60a8\u7684\u958b\u767c\u5de5\u4f5c\u5927\u6709\u88e8\u76ca\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1MySQL\u6578\u64da\u5eabOR\u67e5\u8a62\u6280\u5de7\uff0c\u6df1\u5165\u6dfa\u51fa\u89e3\u6790\u67e5\u8a62\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u6548\u7387\uff0c\u52a9\u4f60\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\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-181386","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/181386","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=181386"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/181386\/revisions"}],"predecessor-version":[{"id":181387,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/181386\/revisions\/181387"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=181386"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=181386"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=181386"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}