{"id":187814,"date":"2024-11-11T17:24:18","date_gmt":"2024-11-11T09:24:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187814\/"},"modified":"2024-11-11T17:24:19","modified_gmt":"2024-11-11T09:24:19","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e5%ad%97%e5%85%b8%e9%a0%86%e5%ba%8f%e6%8e%92%e5%ba%8f%e6%95%b8%e6%93%9a%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187814\/","title":{"rendered":"\u6578\u64da\u5eab\u4e2d\u5982\u4f55\u4f7f\u7528\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\u6578\u64da\uff1f (\u6578\u64da\u5eab\u4e2d\u7684\u5b57\u5178\u9806\u5e8f)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e5%ad%97%e5%85%b8%e9%a0%86%e5%ba%8f%e6%8e%92%e5%ba%8f%e6%95%b8%e6%93%9a%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84-PuHtBfmwTX\">\u6578\u64da\u5eab\u4e2d\u5982\u4f55\u4f7f\u7528\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\u6578\u64da\uff1f (\u6578\u64da\u5eab\u4e2d\u7684\u5b57\u5178\u9806\u5e8f)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u7684\u6392\u5e8f\u662f\u975e\u5e38\u91cd\u8981\u7684\u4e00\u500b\u529f\u80fd\u3002\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\uff08Lexicographical Order\uff09\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u6392\u5e8f\u65b9\u5f0f\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5b57\u7b26\u4e32\u6578\u64da\u6642\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\u7684\u6982\u5ff5\u3001\u5be6\u73fe\u65b9\u6cd5\u4ee5\u53ca\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%ad%97%e5%85%b8%e9%a0%86%e5%ba%8f%e6%8e%92%e5%ba%8f%ef%bc%9f-PuHtBfmwTX\">\u4ec0\u9ebc\u662f\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\uff1f<\/h2>\n<p>\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\u662f\u6307\u6839\u64da\u5b57\u6bcd\u8868\u7684\u9806\u5e8f\u5c0d\u5b57\u7b26\u4e32\u9032\u884c\u6392\u5e8f\u3002\u9019\u7a2e\u6392\u5e8f\u65b9\u5f0f\u985e\u4f3c\u65bc\u5b57\u5178\u4e2d\u55ae\u8a5e\u7684\u6392\u5217\u65b9\u5f0f\u3002\u7576\u6bd4\u8f03\u5169\u500b\u5b57\u7b26\u4e32\u6642\uff0c\u7cfb\u7d71\u6703\u9010\u500b\u5b57\u7b26\u9032\u884c\u6bd4\u8f03\uff0c\u76f4\u5230\u627e\u5230\u4e0d\u540c\u7684\u5b57\u7b26\u70ba\u6b62\u3002\u9019\u7a2e\u6bd4\u8f03\u662f\u57fa\u65bc\u5b57\u7b26\u7684ASCII\u503c\u6216Unicode\u503c\u3002<\/p>\n<h2 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id=\"%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%af%a6%e7%8f%be%e5%ad%97%e5%85%b8%e9%a0%86%e5%ba%8f%e6%8e%92%e5%ba%8f-PuHtBfmwTX\">\u5728\u6578\u64da\u5eab\u4e2d\u5be6\u73fe\u5b57\u5178\u9806\u5e8f\u6392\u5e8f<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\u901a\u5e38\u901a\u904eSQL\u67e5\u8a62\u8a9e\u53e5\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684SQL\u8a9e\u53e5\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5c0d\u6578\u64da\u9032\u884c\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8order-by%e5%ad%90%e5%8f%a5-PuHtBfmwTX\">\u4f7f\u7528ORDER BY\u5b50\u53e5<\/h3>\n<p>\u5728SQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528<code>ORDER BY<\/code>\u5b50\u53e5\u4f86\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u6392\u5e8f\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>employees<\/code>\u7684\u8868\uff0c\u4e26\u5e0c\u671b\u6839\u64da<code>name<\/code>\u5b57\u6bb5\u9032\u884c\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nORDER BY name ASC;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c<code>ASC<\/code>\u8868\u793a\u5347\u5e8f\u6392\u5e8f\u3002\u5982\u679c\u5e0c\u671b\u4ee5\u964d\u5e8f\u6392\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528<code>DESC<\/code>\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nORDER BY name DESC;<\/code><\/pre>\n<h3 id=\"%e5%a4%9a%e5%88%97%e6%8e%92%e5%ba%8f-PuHtBfmwTX\">\u591a\u5217\u6392\u5e8f<\/h3>\n<p>\u6709\u6642\u5019\uff0c\u6211\u5011\u9700\u8981\u6839\u64da\u591a\u500b\u5b57\u6bb5\u9032\u884c\u6392\u5e8f\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5728<code>ORDER 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id=\"%e5%ad%97%e5%85%b8%e9%a0%86%e5%ba%8f%e6%8e%92%e5%ba%8f%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-PuHtBfmwTX\">\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\u5728\u8a31\u591a\u61c9\u7528\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u7528\u6236\u540d\u6216\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u7684\u6392\u5e8f\uff0c\u4ee5\u4fbf\u65bc\u67e5\u627e\u548c\u7ba1\u7406\u3002<\/li>\n<li>\u7522\u54c1\u5217\u8868\u7684\u6392\u5e8f\uff0c\u65b9\u4fbf\u7528\u6236\u700f\u89bd\u548c\u9078\u64c7\u3002<\/li>\n<li>\u5831\u544a\u6216\u6578\u64da\u5206\u6790\u4e2d\u7684\u6578\u64da\u6574\u7406\uff0c\u63d0\u5347\u53ef\u8b80\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-PuHtBfmwTX\">\u7d50\u8ad6<\/h2>\n<p>\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\u662f\u4e00\u7a2e\u6709\u6548\u7684\u6578\u64da\u6392\u5e8f\u65b9\u6cd5\uff0c\u7279\u5225\u9069\u7528\u65bc\u5b57\u7b26\u4e32\u6578\u64da\u7684\u8655\u7406\u3002\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u901a\u904e\u4f7f\u7528<code>ORDER 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href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u548c\u904b\u884c\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u4f7f\u7528\u5b57\u5178\u9806\u5e8f\u6392\u5e8f\u6578\u64da\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u512a\u5316\u6578\u64da\u7ba1\u7406\uff0c\u78ba\u4fdd\u7d50\u679c\u7684\u6e96\u78ba\u6027\u8207\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-187814","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187814","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=187814"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187814\/revisions"}],"predecessor-version":[{"id":187815,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187814\/revisions\/187815"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187814"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187814"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187814"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}