{"id":78482,"date":"2024-10-16T11:55:15","date_gmt":"2024-10-16T03:55:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/78482\/"},"modified":"2024-10-16T11:55:15","modified_gmt":"2024-10-16T03:55:15","slug":"mysql%e6%8c%87%e4%bb%a4-field%ef%bc%88%e6%9f%a5%e6%89%be%e5%ad%97%e7%ac%a6%e4%b8%b2%e4%bd%8d%e7%bd%ae%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/78482\/","title":{"rendered":"MySQL\u6307\u4ee4: FIELD()\uff08\u67e5\u627e\u5b57\u7b26\u4e32\u4f4d\u7f6e\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-field%ef%bc%88%e6%9f%a5%e6%89%be%e5%ad%97%e7%ac%a6%e4%b8%b2%e4%bd%8d%e7%bd%ae%ef%bc%89-dKICWDGQkD\">MySQL\u6307\u4ee4: FIELD()\uff08\u67e5\u627e\u5b57\u7b26\u4e32\u4f4d\u7f6e\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u8cc7\u6599\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u8655\u7406\u548c\u67e5\u8a62\u6578\u64da\u3002\u7576\u6211\u5011\u9700\u8981\u67e5\u627e\u67d0\u500b\u5b57\u7b26\u4e32\u5728\u4e00\u7d44\u5b57\u7b26\u4e32\u4e2d\u7684\u4f4d\u7f6e\u6642\uff0cMySQL\u7684FIELD()\u51fd\u6578\u4fbf\u6210\u70ba\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eFIELD()\u51fd\u6578\u7684\u7528\u6cd5\u53ca\u5176\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"field%e5%87%bd%e6%95%b8%e6%a6%82%e8%bf%b0-dKICWDGQkD\">FIELD()\u51fd\u6578\u6982\u8ff0<\/h2>\n<p>FIELD()\u51fd\u6578\u7684\u4e3b\u8981\u529f\u80fd\u662f\u8fd4\u56de\u4e00\u500b\u5b57\u7b26\u4e32\u5728\u4e00\u7d44\u5b57\u7b26\u4e32\u4e2d\u7684\u4f4d\u7f6e\u3002\u9019\u500b\u51fd\u6578\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>FIELD(str, str1, str2, str3, ...)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>str<\/code>\u662f\u8981\u67e5\u627e\u7684\u5b57\u7b26\u4e32\uff0c\u800c<code>str1, str2, str3, ...<\/code>\u662f\u8981\u9032\u884c\u6bd4\u8f03\u7684\u5b57\u7b26\u4e32\u5217\u8868\u3002\u8a72\u51fd\u6578\u6703\u8fd4\u56de<code>str<\/code>\u5728\u5217\u8868\u4e2d\u7684\u4f4d\u7f6e\uff08\u5f9e1\u958b\u59cb\uff09\uff0c\u5982\u679c\u672a\u627e\u5230\uff0c\u5247\u8fd4\u56de0\u3002<\/p>\n<h2 id=\"field%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-dKICWDGQkD\">FIELD()\u51fd\u6578\u7684\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528FIELD()\u51fd\u6578\uff1a<\/p>\n<pre><code>SELECT FIELD('apple', 'banana', 'apple', 'orange');<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u67e5\u627e\u5b57\u7b26\u4e32\u70ba&#8217;apple&#8217;\uff0c\u800c\u6bd4\u8f03\u7684\u5b57\u7b26\u4e32\u5217\u8868\u70ba&#8217;bana&#8217;, &#8216;apple&#8217;, &#8216;orange&#8217;\u3002\u57f7\u884c\u9019\u689d\u67e5\u8a62\u5f8c\uff0c\u8fd4\u56de\u7684\u7d50\u679c\u5c07\u662f2\uff0c\u56e0\u70ba&#8217;apple&#8217;\u5728\u5217\u8868\u4e2d\u7684\u7b2c\u4e8c\u500b\u4f4d\u7f6e\u3002<\/p>\n<h3 id=\"%e5%a4%9a%e9%87%8d%e6%9f%a5%e8%a9%a2%e7%9a%84%e6%87%89%e7%94%a8-dKICWDGQkD\">\u591a\u91cd\u67e5\u8a62\u7684\u61c9\u7528<\/h3>\n<p>FIELD()\u51fd\u6578\u4e5f\u53ef\u4ee5\u8207\u5176\u4ed6SQL\u67e5\u8a62\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u4fbf\u5728\u66f4\u8907\u96dc\u7684\u67e5\u8a62\u4e2d\u9032\u884c\u5b57\u7b26\u4e32\u4f4d\u7f6e\u7684\u67e5\u627e\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>fruits<\/code>\u7684\u8868\u683c\uff0c\u5305\u542b\u4e00\u5217<code>fruit_name<\/code>\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528FIELD()\u4f86\u6392\u5e8f\u67e5\u8a62\u7d50\u679c\uff1a<\/p>\n<pre><code>SELECT fruit_name\nFROM fruits\nORDER BY FIELD(fruit_name, 'apple', 'banana', 'orange');<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u6839\u64da\u6307\u5b9a\u7684\u9806\u5e8f\uff08apple, banana, orange\uff09\u8fd4\u56de<code>fruits<\/code>\u8868\u4e2d\u7684\u6240\u6709\u6c34\u679c\u540d\u7a31\uff0c\u4e26\u6309\u7167\u9019\u500b\u9806\u5e8f\u9032\u884c\u6392\u5e8f\u3002<\/p>\n<h2 id=\"field%e5%87%bd%e6%95%b8%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-dKICWDGQkD\">FIELD()\u51fd\u6578\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528FIELD()\u51fd\u6578\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li><strong>\u5927\u5c0f\u5beb\u654f\u611f\u6027\uff1a<\/strong>FIELD()\u51fd\u6578\u5728\u6bd4\u8f03\u5b57\u7b26\u4e32\u6642\u662f\u5927\u5c0f\u5beb\u654f\u611f\u7684\uff0c\u56e0\u6b64&#8217;apple&#8217;\u548c&#8217;Apple&#8217;\u6703\u88ab\u8996\u70ba\u4e0d\u540c\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<li><strong>\u6027\u80fd\u8003\u91cf\uff1a<\/strong>\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u4f7f\u7528FIELD()\u51fd\u6578\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u6c92\u6709\u7d22\u5f15\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<li><strong>\u8fd4\u56de\u503c\uff1a<\/strong>\u5982\u679c\u67e5\u627e\u7684\u5b57\u7b26\u4e32\u4e0d\u5728\u5217\u8868\u4e2d\uff0cFIELD()\u5c07\u8fd4\u56de0\uff0c\u9019\u4e00\u9ede\u5728\u9032\u884c\u5f8c\u7e8c\u64cd\u4f5c\u6642\u9700\u8981\u7279\u5225\u6ce8\u610f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-dKICWDGQkD\">\u7d50\u8ad6<\/h2>\n<p>FIELD()\u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728MySQL\u4e2d\u5feb\u901f\u67e5\u627e\u5b57\u7b26\u4e32\u7684\u4f4d\u7f6e\u3002\u7121\u8ad6\u662f\u5728\u7c21\u55ae\u7684\u67e5\u8a62\u9084\u662f\u8907\u96dc\u7684\u6578\u64da\u8655\u7406\u904e\u7a0b\u4e2d\uff0c\u638c\u63e1\u9019\u500b\u51fd\u6578\u7684\u4f7f\u7528\u90fd\u80fd\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u9032\u884c\u5b57\u7b26\u4e32\u6bd4\u8f03\u548c\u6392\u5e8f\u7684\u5834\u666f\uff0cFIELD()\u51fd\u6578\u63d0\u4f9b\u4e86\u4e00\u500b\u7c21\u55ae\u800c\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bcMySQL\u7684\u5176\u4ed6\u529f\u80fd\u6216\u5982\u4f55\u5728<code>VPS<\/code>\u74b0\u5883\u4e2d\u904b\u884cMySQL\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\u3002\u7121\u8ad6\u662f<code>\u9999\u6e2fVPS<\/code>\u9084\u662f\u5176\u4ed6<code>\u4e91\u670d\u52a1\u5668<\/code>\u89e3\u6c7a\u65b9\u6848\uff0c\u6211\u5011\u90fd\u80fd\u63d0\u4f9b\u5c08\u696d\u7684\u652f\u6301\u548c\u670d\u52d9\u3002\u8acb\u67e5\u770b\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a> \u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6307\u4ee4FIELD()\uff0c\u7528\u4e8e\u67e5\u627e\u5b57\u7b26\u4e32\u5728\u5217\u8868\u4e2d\u7684\u4f4d\u7f6e\uff0c\u63d0\u5347\u6570\u636e\u67e5\u8be2\u6548\u7387\uff0c\u7b80\u5316\u6761\u4ef6\u5224\u65ad\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-78482","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78482","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=78482"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78482\/revisions"}],"predecessor-version":[{"id":78483,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78482\/revisions\/78483"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=78482"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=78482"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=78482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}