{"id":79912,"date":"2024-10-16T13:40:16","date_gmt":"2024-10-16T05:40:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/79912\/"},"modified":"2024-10-16T13:40:16","modified_gmt":"2024-10-16T05:40:16","slug":"mysql%e6%8c%87%e4%bb%a4-strcmp%ef%bc%88%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%af%94%e8%bc%83%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/79912\/","title":{"rendered":"MySQL\u6307\u4ee4: STRCMP()\uff08\u5b57\u7b26\u4e32\u6bd4\u8f03\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-strcmp%ef%bc%88%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%af%94%e8%bc%83%ef%bc%89-rRSJrmpzCP\">MySQL\u6307\u4ee4: STRCMP()\uff08\u5b57\u7b26\u4e32\u6bd4\u8f03\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u5b57\u7b26\u4e32\u6bd4\u8f03\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002MySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u6bd4\u8f03\u5b57\u7b26\u4e32\uff0c\u5176\u4e2d<strong>STRCMP()<\/strong>\u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u5de5\u5177\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eSTRCMP()\u51fd\u6578\u7684\u7528\u6cd5\u3001\u529f\u80fd\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"strcmp%e5%87%bd%e6%95%b8%e6%a6%82%e8%bf%b0-rRSJrmpzCP\">STRCMP()\u51fd\u6578\u6982\u8ff0<\/h2>\n<p>STRCMP()\u51fd\u6578\u7684\u4e3b\u8981\u529f\u80fd\u662f\u6bd4\u8f03\u5169\u500b\u5b57\u7b26\u4e32\uff0c\u4e26\u6839\u64da\u6bd4\u8f03\u7d50\u679c\u8fd4\u56de\u4e00\u500b\u6574\u6578\u503c\u3002\u9019\u500b\u6574\u6578\u503c\u7684\u610f\u7fa9\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u7b2c\u4e00\u500b\u5b57\u7b26\u4e32\u5c0f\u65bc\u7b2c\u4e8c\u500b\u5b57\u7b26\u4e32\uff0c\u5247\u8fd4\u56de\u8ca0\u6578\u3002<\/li>\n<li>\u5982\u679c\u5169\u500b\u5b57\u7b26\u4e32\u76f8\u7b49\uff0c\u5247\u8fd4\u56de0\u3002<\/li>\n<li>\u5982\u679c\u7b2c\u4e00\u500b\u5b57\u7b26\u4e32\u5927\u65bc\u7b2c\u4e8c\u500b\u5b57\u7b26\u4e32\uff0c\u5247\u8fd4\u56de\u6b63\u6578\u3002<\/li>\n<\/ul>\n<p>\u9019\u4f7f\u5f97STRCMP()\u51fd\u6578\u5728\u9700\u8981\u9032\u884c\u5b57\u7b26\u4e32\u6392\u5e8f\u6216\u7be9\u9078\u7684\u60c5\u6cc1\u4e0b\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h2 id=\"strcmp%e5%87%bd%e6%95%b8%e7%9a%84%e8%aa%9e%e6%b3%95-rRSJrmpzCP\">STRCMP()\u51fd\u6578\u7684\u8a9e\u6cd5<\/h2>\n<pre><code>STRCMP(str1, str2)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>str1<\/code>\u548c<code>str2<\/code>\u662f\u8981\u6bd4\u8f03\u7684\u5169\u500b\u5b57\u7b26\u4e32\u3002\u9019\u5169\u500b\u53c3\u6578\u53ef\u4ee5\u662f\u5b57\u7b26\u4e32\u5e38\u91cf\u3001\u5217\u540d\u6216\u8868\u9054\u5f0f\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b-rRSJrmpzCP\">\u4f7f\u7528\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528STRCMP()\u51fd\u6578\u7684\u793a\u4f8b\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7406\u89e3\u5176\u7528\u6cd5\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b1-%e5%9f%ba%e6%9c%ac%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%af%94%e8%bc%83-rRSJrmpzCP\">\u793a\u4f8b1: \u57fa\u672c\u5b57\u7b26\u4e32\u6bd4\u8f03<\/h3>\n<pre><code>SELECT STRCMP('apple', 'banana') AS comparison_result;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u56e0\u70ba&#8217;apple&#8217;\u5c0f\u65bc&#8217;banana&#8217;\uff0c\u6240\u4ee5\u8fd4\u56de\u7684\u7d50\u679c\u5c07\u662f\u4e00\u500b\u8ca0\u6578\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b2-%e6%af%94%e8%bc%83%e7%9b%b8%e5%90%8c%e5%ad%97%e7%ac%a6%e4%b8%b2-rRSJrmpzCP\">\u793a\u4f8b2: \u6bd4\u8f03\u76f8\u540c\u5b57\u7b26\u4e32<\/h3>\n<pre><code>SELECT STRCMP('orange', 'orange') AS comparison_result;<\/code><\/pre>\n<p>\u9019\u88e1\uff0c\u7531\u65bc\u5169\u500b\u5b57\u7b26\u4e32\u76f8\u7b49\uff0c\u8fd4\u56de\u7684\u7d50\u679c\u5c07\u662f0\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b3-%e5%9c%a8where%e5%ad%90%e5%8f%a5%e4%b8%ad%e4%bd%bf%e7%94%a8strcmp-rRSJrmpzCP\">\u793a\u4f8b3: \u5728WHERE\u5b50\u53e5\u4e2d\u4f7f\u7528STRCMP()<\/h3>\n<p>STRCMP()\u51fd\u6578\u4e5f\u53ef\u4ee5\u5728\u67e5\u8a62\u4e2d\u7528\u65bc\u7be9\u9078\u6578\u64da\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>fruits<\/code>\u7684\u8868\uff0c\u4e26\u5e0c\u671b\u627e\u5230\u6240\u6709\u540d\u7a31\u70ba&#8217;apple&#8217;\u7684\u8a18\u9304\uff1a<\/p>\n<pre><code>SELECT * FROM fruits WHERE STRCMP(name, 'apple') = 0;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u540d\u7a31\u70ba&#8217;apple&#8217;\u7684\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-rRSJrmpzCP\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528STRCMP()\u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>STRCMP()\u51fd\u6578\u662f\u5340\u5206\u5927\u5c0f\u5beb\u7684\uff0c\u9019\u610f\u5473\u8457&#8217;Apple&#8217;\u548c&#8217;apple&#8217;\u6703\u88ab\u8996\u70ba\u4e0d\u540c\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<li>\u5728\u6bd4\u8f03\u5b57\u7b26\u4e32\u6642\uff0cMySQL\u6703\u6839\u64da\u5b57\u7b26\u7684ASCII\u503c\u9032\u884c\u6bd4\u8f03\uff0c\u56e0\u6b64\u67d0\u4e9b\u5b57\u7b26\u53ef\u80fd\u6703\u5f71\u97ff\u6bd4\u8f03\u7d50\u679c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-rRSJrmpzCP\">\u7e3d\u7d50<\/h2>\n<p>STRCMP()\u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728MySQL\u4e2d\u9032\u884c\u5b57\u7b26\u4e32\u6bd4\u8f03\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u7be9\u9078\u9084\u662f\u6392\u5e8f\u4e2d\uff0c\u9019\u500b\u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u6709\u6548\u7684\u652f\u6301\u3002\u4e86\u89e3\u5982\u4f55\u6b63\u78ba\u4f7f\u7528STRCMP()\u51fd\u6578\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u60a8\u7684\u6578\u64da\u5eab\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6307\u4ee4STRCMP()\uff0c\u7528\u65bc\u6bd4\u8f03\u5169\u500b\u5b57\u7b26\u4e32\u7684\u5927\u5c0f\uff0c\u8fd4\u56de\u6bd4\u8f03\u7d50\u679c\uff0c\u5e6b\u52a9\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u7684\u5b57\u7b26\u4e32\u8655\u7406\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-79912","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79912","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=79912"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79912\/revisions"}],"predecessor-version":[{"id":79913,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79912\/revisions\/79913"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=79912"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=79912"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=79912"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}