{"id":78486,"date":"2024-10-16T11:57:15","date_gmt":"2024-10-16T03:57:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/78486\/"},"modified":"2024-10-16T11:57:15","modified_gmt":"2024-10-16T03:57:15","slug":"mysql%e6%8c%87%e4%bb%a4-find_in_set%ef%bc%88%e6%9f%a5%e6%89%be%e5%8c%85%e5%90%ab%e9%97%9c%e4%bf%82%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/78486\/","title":{"rendered":"MySQL\u6307\u4ee4: FIND_IN_SET()\uff08\u67e5\u627e\u5305\u542b\u95dc\u4fc2\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-find_in_set%ef%bc%88%e6%9f%a5%e6%89%be%e5%8c%85%e5%90%ab%e9%97%9c%e4%bf%82%ef%bc%89-eJmKJxHXgf\">MySQL\u6307\u4ee4: FIND_IN_SET()\uff08\u67e5\u627e\u5305\u542b\u95dc\u4fc2\uff09<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u578b\u6578\u64da\u5eab\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u5f37\u5927\u7684\u6307\u4ee4\u4f86\u8655\u7406\u6578\u64da\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u51fd\u6578\u3002\u9019\u500b\u51fd\u6578\u4e3b\u8981\u7528\u65bc\u67e5\u627e\u4e00\u500b\u503c\u662f\u5426\u5b58\u5728\u65bc\u4e00\u500b\u4ee5\u9017\u865f\u5206\u9694\u7684\u5b57\u7b26\u4e32\u4e2d\uff0c\u9019\u5728\u8655\u7406\u5305\u542b\u95dc\u4fc2\u6642\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h2 id=\"find_in_set%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-eJmKJxHXgf\">FIND_IN_SET()\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>FIND_IN_SET()\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>FIND_IN_SET(value, set)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>value<\/code>\u662f\u8981\u67e5\u627e\u7684\u503c\uff0c\u800c<code>set<\/code>\u662f\u4ee5\u9017\u865f\u5206\u9694\u7684\u5b57\u7b26\u4e32\u3002\u8a72\u51fd\u6578\u8fd4\u56de\u503c\u7684\u7d22\u5f15\uff08\u5f9e1\u958b\u59cb\uff09\uff0c\u5982\u679c\u672a\u627e\u5230\u5247\u8fd4\u56de0\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-eJmKJxHXgf\">\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528\u51fd\u6578\uff1a<\/p>\n<pre><code>SELECT FIND_IN_SET('apple', 'banana,apple,orange');<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u67e5\u627e\u7684\u503c\u662f&#8217;apple&#8217;\uff0c\u800c\u4ee5\u9017\u865f\u5206\u9694\u7684\u5b57\u7b26\u4e32\u662f&#8217;bana,apple,orange&#8217;\u3002\u57f7\u884c\u9019\u500b\u67e5\u8a62\u5f8c\uff0c\u8fd4\u56de\u7684\u7d50\u679c\u5c07\u662f2\uff0c\u56e0\u70ba&#8217;apple&#8217;\u5728\u5b57\u7b26\u4e32\u4e2d\u7684\u7b2c\u4e8c\u500b\u4f4d\u7f6e\u3002<\/p>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-eJmKJxHXgf\">\u5be6\u969b\u61c9\u7528\u5834\u666f<\/h2>\n<p>FIND_IN_SET()\u51fd\u6578\u5728\u8a31\u591a\u5be6\u969b\u61c9\u7528\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u591a\u5c0d\u591a\u95dc\u4fc2\u6642\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u7528\u6236\u8868\u548c\u4e00\u500b\u89d2\u8272\u8868\uff0c\u6bcf\u500b\u7528\u6236\u53ef\u4ee5\u64c1\u6709\u591a\u500b\u89d2\u8272\uff0c\u9019\u4e9b\u89d2\u8272\u4ee5\u9017\u865f\u5206\u9694\u5b58\u5132\u5728\u7528\u6236\u8868\u4e2d\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    id INT PRIMARY KEY,\n    name VARCHAR(50),\n    roles VARCHAR(100)\n);\n\nINSERT INTO users (id, name, roles) VALUES\n(1, 'Alice', 'admin,user'),\n(2, 'Bob', 'user'),\n(3, 'Charlie', 'admin,editor');\n<\/code><\/pre>\n<p>\u5982\u679c\u6211\u5011\u60f3\u67e5\u627e\u6240\u6709\u64c1\u6709&#8217;admin&#8217;\u89d2\u8272\u7684\u7528\u6236\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE FIND_IN_SET('admin', roles) &gt; 0;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u6240\u6709\u64c1\u6709&#8217;admin&#8217;\u89d2\u8272\u7684\u7528\u6236\uff0c\u5305\u62ecAlice\u548cCharlie\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-eJmKJxHXgf\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136\u51fd\u6578\u975e\u5e38\u65b9\u4fbf\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u6027\u80fd\uff1a\u7531\u65bc\u9700\u8981\u5c0d\u6bcf\u4e00\u884c\u9032\u884c\u5b57\u7b26\u4e32\u5339\u914d\uff0c\u56e0\u6b64\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002<\/li>\n<li>\u6578\u64da\u5b8c\u6574\u6027\uff1a\u4f7f\u7528\u9017\u865f\u5206\u9694\u7684\u5b57\u7b26\u4e32\u5b58\u5132\u591a\u500b\u503c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\uff0c\u5efa\u8b70\u4f7f\u7528\u95dc\u806f\u8868\u4f86\u8655\u7406\u591a\u5c0d\u591a\u95dc\u4fc2\u3002<\/li>\n<li>\u7d22\u5f15\uff1aFIND_IN_SET()\u7121\u6cd5\u5229\u7528\u7d22\u5f15\uff0c\u9019\u610f\u5473\u8457\u67e5\u8a62\u901f\u5ea6\u53ef\u80fd\u6703\u8f03\u6162\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-eJmKJxHXgf\">\u7e3d\u7d50<\/h2>\n<p>FIND_IN_SET()\u662f\u4e00\u500b\u5f37\u5927\u7684MySQL\u51fd\u6578\uff0c\u9069\u5408\u7528\u65bc\u67e5\u627e\u4ee5\u9017\u865f\u5206\u9694\u7684\u5b57\u7b26\u4e32\u4e2d\u7684\u503c\u3002\u96d6\u7136\u5b83\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u975e\u5e38\u65b9\u4fbf\uff0c\u4f46\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u61c9\u8003\u616e\u5230\u6027\u80fd\u548c\u6578\u64da\u5b8c\u6574\u6027\u7b49\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u67e5\u8a62\u7684\u5834\u666f\uff0c\u5efa\u8b70\u4f7f\u7528\u95dc\u806f\u8868\u4f86\u8655\u7406\u591a\u5c0d\u591a\u95dc\u4fc2\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u6258\u7ba1\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9019\u5c07\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u548c\u5feb\u901f\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6307\u4ee4FIND_IN_SET()\uff0c\u7528\u65bc\u67e5\u627e\u5b57\u7b26\u4e32\u662f\u5426\u5728\u9017\u865f\u5206\u9694\u7684\u5217\u8868\u4e2d\uff0c\u7c21\u5316\u6578\u64da\u67e5\u8a62\u8207\u7be9\u9078\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-78486","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78486","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=78486"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78486\/revisions"}],"predecessor-version":[{"id":78487,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78486\/revisions\/78487"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=78486"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=78486"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=78486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}