{"id":200366,"date":"2025-05-06T09:37:22","date_gmt":"2025-05-06T01:37:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200366\/"},"modified":"2025-05-06T09:37:22","modified_gmt":"2025-05-06T01:37:22","slug":"%e4%bd%bf%e7%94%a8-collate-%e6%9f%a5%e6%89%be%e9%87%8d%e5%a4%8d%e7%94%a8%e6%88%b7%e5%90%8d%e6%97%b6%e6%8a%a5%e9%94%99%ef%bc%8c%e5%a6%82%e4%bd%95%e8%a7%a3%e5%86%b3%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200366\/","title":{"rendered":"\u4f7f\u7528 COLLATE \u67e5\u627e\u91cd\u590d\u7528\u6237\u540d\u65f6\u62a5\u9519\uff0c\u5982\u4f55\u89e3\u51b3\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u4f7f\u7528 COLLATE \u67e5\u627e\u91cd\u590d\u7528\u6237\u540d\u65f6\u62a5\u9519\uff0c\u5982\u4f55\u89e3\u51b3\uff1f<\/h1>\n<p>\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u6253\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\u5427\uff01\u6587\u4e2d\u5185\u5bb9\u5305\u542b\u7b49\u7b49\u77e5\u8bc6\u70b9&#8230;\u5e0c\u671b\u4f60\u80fd\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u771f\u771f\u5b9e\u5b9e\u5b66\u5230\u77e5\u8bc6\u6216\u8005\u5e2e\u4f60\u89e3\u51b3\u5fc3\u4e2d\u7684\u7591\u60d1\uff0c\u4e5f\u6b22\u8fce\u5927\u4f6c\u6216\u8005\u65b0\u4eba\u670b\u53cb\u4eec\u591a\u7559\u8a00\u8bc4\u8bba\uff0c\u591a\u7ed9\u5efa\u8bae\uff01\u8c22\u8c22\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241103\/17306013876726e1abe9a28.jpg\" class=\"aligncenter\"><\/p>\n<h2>mysql \u4e2d collate \u7684\u5b57\u7b26\u96c6\u8f6c\u6362\u95ee\u9898<\/h2>\n<p>\u5728 mysql \u4e2d\uff0c\u4f7f\u7528 collate \u8bed\u53e5\u53ef\u4ee5\u6307\u5b9a\u5b57\u7b26\u4e32\u6bd4\u8f83\u65f6\u4f7f\u7528\u7684\u5b57\u7b26\u96c6\u548c\u6821\u5bf9\u89c4\u5219\u3002\u5728\u4f7f\u7528\u4e0d\u540c\u5b57\u7b26\u96c6\u548c\u6821\u5bf9\u89c4\u5219\u65f6\uff0c\u76f8\u540c\u7684\u5b57\u7b26\u53ef\u80fd\u88ab\u89c6\u4e3a\u4e0d\u540c\u6216\u76f8\u7b49\u3002<\/p>\n<p><strong>\u95ee\u9898\uff1a<\/strong><\/p>\n<p>\u5728\u4e00\u4e2a\u4f7f\u7528 gbk \u5b57\u7b26\u96c6\u7684\u8868\u4e2d\uff0c\u6709\u91cd\u590d\u7684\u7528\u6237\u540d\uff0c\u4f7f\u7528 collate utf8mb4_general_ci \u5206\u7ec4\u67e5\u627e\u91cd\u590d\u7528\u6237\u540d\u65f6\u62a5\u9519\u3002\u5982\u4f55\u89e3\u51b3\uff1f<\/p>\n<p><strong>\u7b54\u6848\uff1a<\/strong><\/p>\n<p>\u5bfc\u81f4\u62a5\u9519\u7684\u539f\u56e0\u662f\uff0ccollate \u8bed\u53e5\u9700\u8981\u5728\u5217\u540d\u4e4b\u540e\u4f7f\u7528\uff0c\u800c\u4e0d\u662f\u5728 group by \u8bed\u53e5\u4e4b\u540e\u3002\u6b63\u786e\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>select username collate utf8mb4_general_ci\nfrom test.user\ngroup by username collate utf8mb4_general_ci;<\/pre>\n<p>\u5982\u679c\u65e0\u6cd5\u4f7f\u7528 collate \u8bed\u53e5\uff0c\u53e6\u4e00\u79cd\u89e3\u51b3\u529e\u6cd5\u662f\u4f7f\u7528 convert \u51fd\u6570\u5c06\u7528\u6237\u540d\u8f6c\u6362\u4e3a utf8mb4 \u5b57\u7b26\u96c6\uff0c\u7136\u540e\u8fdb\u884c\u5206\u7ec4\uff1a<\/p>\n<pre>SELECT CONVERT(username, CHAR CHARACTER SET utf8mb4) collate utf8mb4_general_ci\nFROM test.user\nGROUP BY CONVERT(username, CHAR CHARACTER SET utf8mb4) collate utf8mb4_general_ci;<\/pre>\n<p>\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u4f7f\u7528 COLLATE \u67e5\u627e\u91cd\u590d\u7528\u6237\u540d\u65f6\u62a5\u9519\uff0c\u5982\u4f55\u89e3\u51b3\uff1f\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528 COLLATE \u67e5\u627e\u91cd\u590d\u7528&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200366","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200366","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200366"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200366\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200366"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}