{"id":80197,"date":"2024-10-16T14:00:16","date_gmt":"2024-10-16T06:00:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/80197\/"},"modified":"2024-10-16T14:00:16","modified_gmt":"2024-10-16T06:00:16","slug":"mysql%e6%8c%87%e4%bb%a4-upper%ef%bc%88%e8%bd%89%e7%82%ba%e5%a4%a7%e5%af%ab%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/80197\/","title":{"rendered":"MySQL\u6307\u4ee4: UPPER()\uff08\u8f49\u70ba\u5927\u5beb\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-upper%ef%bc%88%e8%bd%89%e7%82%ba%e5%a4%a7%e5%af%ab%ef%bc%89-MwKgShUmqj\">MySQL\u6307\u4ee4: UPPER()\uff08\u8f49\u70ba\u5927\u5beb\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u95dc\u806f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u8655\u7406\u548c\u64cd\u4f5c\u8cc7\u6599\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u5b57\u4e32\u8655\u7406\u51fd\u6578\u3002\u672c\u6587\u5c07\u91cd\u9ede\u4ecb\u7d39MySQL\u4e2d\u7684UPPER()\u51fd\u6578\uff0c\u9019\u662f\u4e00\u500b\u7528\u65bc\u5c07\u5b57\u4e32\u8f49\u63db\u70ba\u5927\u5beb\u7684\u7c21\u55ae\u800c\u6709\u6548\u7684\u5de5\u5177\u3002<\/p>\n<h2 id=\"upper%e5%87%bd%e6%95%b8%e6%a6%82%e8%bf%b0-MwKgShUmqj\">UPPER()\u51fd\u6578\u6982\u8ff0<\/h2>\n<p>UPPER()\u51fd\u6578\u7684\u4e3b\u8981\u529f\u80fd\u662f\u5c07\u8f38\u5165\u7684\u5b57\u4e32\u8f49\u63db\u70ba\u5168\u5927\u5beb\u5b57\u6bcd\u3002\u9019\u5728\u8a31\u591a\u60c5\u6cc1\u4e0b\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u5728\u9032\u884c\u8cc7\u6599\u6bd4\u5c0d\u6642\uff0c\u56e0\u70ba\u5b57\u6bcd\u7684\u5927\u5c0f\u5beb\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u7d50\u679c\u3002<\/p>\n<h3 id=\"%e8%aa%9e%e6%b3%95-MwKgShUmqj\">\u8a9e\u6cd5<\/h3>\n<pre><code>UPPER(string)<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>string<\/code>\u662f\u8981\u8f49\u63db\u70ba\u5927\u5beb\u7684\u5b57\u4e32\u3002\u9019\u500b\u51fd\u6578\u6703\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u5b57\u4e32\uff0c\u8a72\u5b57\u4e32\u4e2d\u7684\u6240\u6709\u5b57\u6bcd\u90fd\u88ab\u8f49\u63db\u70ba\u5927\u5beb\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-MwKgShUmqj\">\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528UPPER()\u51fd\u6578\u7684\u7bc4\u4f8b\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7406\u89e3\u5176\u7528\u6cd5\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b1-%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-MwKgShUmqj\">\u7bc4\u4f8b1: \u57fa\u672c\u7528\u6cd5<\/h3>\n<pre><code>SELECT UPPER('hello world');<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u67e5\u8a62\u5f8c\uff0c\u7d50\u679c\u5c07\u986f\u793a\u70ba:<\/p>\n<pre><code>HELLO WORLD<\/code><\/pre>\n<h3 id=\"%e7%af%84%e4%be%8b2-%e5%9c%a8%e6%9f%a5%e8%a9%a2%e4%b8%ad%e4%bd%bf%e7%94%a8upper-MwKgShUmqj\">\u7bc4\u4f8b2: \u5728\u67e5\u8a62\u4e2d\u4f7f\u7528UPPER()<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>users<\/code>\u7684\u8cc7\u6599\u8868\uff0c\u8a72\u8cc7\u6599\u8868\u5305\u542b\u7528\u6236\u7684\u59d3\u540d\u3002\u82e5\u8981\u67e5\u8a62\u6240\u6709\u7528\u6236\u7684\u59d3\u540d\u4e26\u5c07\u5176\u8f49\u63db\u70ba\u5927\u5beb\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62:<\/p>\n<pre><code>SELECT UPPER(name) AS upper_name FROM users;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u4e00\u500b\u5305\u542b\u6240\u6709\u7528\u6236\u59d3\u540d\u7684\u5927\u5beb\u7248\u672c\u7684\u7d50\u679c\u96c6\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b3-%e7%b5%90%e5%90%88where%e5%ad%90%e5%8f%a5-MwKgShUmqj\">\u7bc4\u4f8b3: \u7d50\u5408WHERE\u5b50\u53e5<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u5e0c\u671b\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528UPPER()\u4f86\u9032\u884c\u4e0d\u5340\u5206\u5927\u5c0f\u5beb\u7684\u6bd4\u5c0d\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u67e5\u8a62\u540d\u70ba\u201cjohn\u201d\u7684\u7528\u6236\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb:<\/p>\n<pre><code>SELECT * FROM users WHERE UPPER(name) = UPPER('john');<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u7121\u8ad6\u7528\u6236\u59d3\u540d\u7684\u5927\u5c0f\u5beb\u5982\u4f55\uff0c\u67e5\u8a62\u90fd\u80fd\u6b63\u78ba\u8fd4\u56de\u7d50\u679c\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-MwKgShUmqj\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u4f7f\u7528UPPER()\u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>UPPER()\u51fd\u6578\u50c5\u5f71\u97ff\u5b57\u6bcd\uff0c\u6578\u5b57\u548c\u7b26\u865f\u4e0d\u6703\u53d7\u5230\u5f71\u97ff\u3002<\/li>\n<li>\u5728\u67d0\u4e9b\u8a9e\u8a00\u4e2d\uff0c\u5b57\u6bcd\u7684\u5927\u5c0f\u5beb\u8f49\u63db\u53ef\u80fd\u6703\u53d7\u5230\u8a9e\u8a00\u7279\u6027\u7684\u5f71\u97ff\uff0c\u56e0\u6b64\u5728\u591a\u8a9e\u8a00\u74b0\u5883\u4e2d\u4f7f\u7528\u6642\u9700\u8b39\u614e\u3002<\/li>\n<li>UPPER()\u51fd\u6578\u6703\u589e\u52a0\u67e5\u8a62\u7684\u8a08\u7b97\u8ca0\u64d4\uff0c\u7279\u5225\u662f\u5728\u5927\u578b\u8cc7\u6599\u96c6\u4e0a\u9032\u884c\u64cd\u4f5c\u6642\uff0c\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-MwKgShUmqj\">\u7e3d\u7d50<\/h2>\n<p>UPPER()\u51fd\u6578\u662f\u4e00\u500b\u7c21\u55ae\u800c\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728MySQL\u4e2d\u9032\u884c\u5b57\u4e32\u7684\u5927\u5c0f\u5beb\u8f49\u63db\u3002\u7121\u8ad6\u662f\u5728\u8cc7\u6599\u67e5\u8a62\u9084\u662f\u8cc7\u6599\u6bd4\u5c0d\u4e2d\uff0c\u9019\u500b\u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u4fbf\u5229\u3002\u4e86\u89e3\u5982\u4f55\u6709\u6548\u4f7f\u7528UPPER()\u51fd\u6578\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u8cc7\u6599\u5eab\u64cd\u4f5c\u7684\u9748\u6d3b\u6027\u548c\u6e96\u78ba\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u8cc7\u6599\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u76f8\u95dc\u6280\u8853\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\uff0c\u7279\u5225\u662f\u6211\u5011\u63d0\u4f9b\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u89e3\u6c7a\u65b9\u6848\uff0c\u52a9\u60a8\u5728\u6578\u4f4d\u4e16\u754c\u4e2d\u66f4\u4e0a\u4e00\u5c64\u6a13\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528MySQL\u7684UPPER()\u51fd\u6578\u5c07\u5b57\u4e32\u8f49\u70ba\u5927\u5beb\uff0c\u7c21\u5316\u6578\u64da\u8655\u7406\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u78ba\u4fdd\u4e00\u81f4\u6027\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-80197","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80197","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=80197"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80197\/revisions"}],"predecessor-version":[{"id":80198,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80197\/revisions\/80198"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=80197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=80197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=80197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}