{"id":175429,"date":"2024-11-08T05:48:15","date_gmt":"2024-11-07T21:48:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175429\/"},"modified":"2024-11-08T05:48:16","modified_gmt":"2024-11-07T21:48:16","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8sql%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e9%80%b2%e8%a1%8c%e8%8b%b1%e6%96%87%e6%8e%92%e5%ba%8f%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab%e8%8b%b1%e6%96%87","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175429\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528SQL\u5728\u6578\u64da\u5eab\u4e2d\u9032\u884c\u82f1\u6587\u6392\u5e8f\uff08\u6578\u64da\u5eab\u82f1\u6587\u6392\u5e8f\uff09"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8sql%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e9%80%b2%e8%a1%8c%e8%8b%b1%e6%96%87%e6%8e%92%e5%ba%8f%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab%e8%8b%b1%e6%96%87-yZgmnttdGo\">\u5982\u4f55\u4f7f\u7528SQL\u5728\u6578\u64da\u5eab\u4e2d\u9032\u884c\u82f1\u6587\u6392\u5e8f\uff08\u6578\u64da\u5eab\u82f1\u6587\u6392\u5e8f\uff09<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6392\u5e8f\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u64cd\u4f5c\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002\u7576\u6211\u5011\u9700\u8981\u5c0d\u6578\u64da\u9032\u884c\u82f1\u6587\u6392\u5e8f\u6642\uff0cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u529f\u80fd\u4f86\u5be6\u73fe\u9019\u4e00\u9700\u6c42\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528SQL\u9032\u884c\u82f1\u6587\u6392\u5e8f\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"sql%e6%8e%92%e5%ba%8f%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-yZgmnttdGo\">SQL\u6392\u5e8f\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728SQL\u4e2d\uff0c\u6392\u5e8f\u901a\u5e38\u662f\u901a\u904e\u4f7f\u7528<strong>ORDER BY<\/strong>\u5b50\u53e5\u4f86\u5be6\u73fe\u7684\u3002\u9019\u500b\u5b50\u53e5\u53ef\u4ee5\u7528\u4f86\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u5347\u5e8f\u6216\u964d\u5e8f\u6392\u5e8f\u3002\u9ed8\u8a8d\u60c5\u6cc1\u4e0b\uff0cORDER BY\u6703\u9032\u884c\u5347\u5e8f\u6392\u5e8f\uff0c\u800c\u4f7f\u7528<strong>DESC<\/strong>\u95dc\u9375\u5b57\u5247\u53ef\u4ee5\u9032\u884c\u964d\u5e8f\u6392\u5e8f\u3002<\/p>\n<h2 id=\"%e8%8b%b1%e6%96%87%e6%8e%92%e5%ba%8f%e7%9a%84%e7%89%b9%e9%bb%9e-yZgmnttdGo\">\u82f1\u6587\u6392\u5e8f\u7684\u7279\u9ede<\/h2>\n<p>\u5728\u9032\u884c\u82f1\u6587\u6392\u5e8f\u6642\uff0cSQL\u6703\u6839\u64da\u5b57\u6bcd\u7684ASCII\u78bc\u503c\u9032\u884c\u6bd4\u8f03\u3002\u9019\u610f\u5473\u8457\u5927\u5beb\u5b57\u6bcd\u6703\u5728\u5c0f\u5beb\u5b57\u6bcd\u4e4b\u524d\u3002\u4f8b\u5982\uff0c\u5b57\u6bcd\u201cA\u201d\u6703\u6392\u5728\u5b57\u6bcd\u201ca\u201d\u4e4b\u524d\u3002\u9019\u4e00\u9ede\u5728\u8655\u7406\u5305\u542b\u5927\u5c0f\u5beb\u5b57\u6bcd\u7684\u6578\u64da\u6642\u7279\u5225\u91cd\u8981\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8order-by%e9%80%b2%e8%a1%8c%e8%8b%b1%e6%96%87%e6%8e%92%e5%ba%8f%e7%9a%84%e7%a4%ba%e4%be%8b-yZgmnttdGo\">\u4f7f\u7528ORDER BY\u9032\u884c\u82f1\u6587\u6392\u5e8f\u7684\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528ORDER BY\u5c0d\u4e00\u500b\u5305\u542b\u82f1\u6587\u540d\u5b57\u7684\u6578\u64da\u8868\u9032\u884c\u6392\u5e8f\u3002<\/p>\n<pre><code>SELECT name FROM users\nORDER BY name ASC;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5f9e\u540d\u70ba<strong>users<\/strong>\u7684\u8868\u4e2d\u9078\u64c7<strong>name<\/strong>\u5b57\u6bb5\uff0c\u4e26\u6309\u7167\u5347\u5e8f\u9032\u884c\u6392\u5e8f\u3002\u5982\u679c\u6211\u5011\u5e0c\u671b\u6309\u7167\u964d\u5e8f\u6392\u5e8f\uff0c\u53ea\u9700\u5c07<strong>ASC<\/strong>\u66ff\u63db\u70ba<strong>DESC<\/strong>\uff1a<\/p>\n<pre><code>SELECT name FROM users\nORDER BY name DESC;<\/code><\/pre>\n<h2 id=\"%e8%99%95%e7%90%86%e7%89%b9%e6%ae%8a%e5%ad%97%e7%ac%a6%e5%92%8c%e7%a9%ba%e5%80%bc-yZgmnttdGo\">\u8655\u7406\u7279\u6b8a\u5b57\u7b26\u548c\u7a7a\u503c<\/h2>\n<p>\u5728\u9032\u884c\u82f1\u6587\u6392\u5e8f\u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u7279\u6b8a\u5b57\u7b26\u548c\u7a7a\u503c\u7684\u60c5\u6cc1\u3002SQL\u5728\u6392\u5e8f\u6642\u6703\u5c07\u7a7a\u503c\u8996\u70ba\u6700\u5c0f\u503c\uff0c\u56e0\u6b64\u5b83\u5011\u6703\u6392\u5728\u6700\u524d\u9762\u3002\u5982\u679c\u9700\u8981\u5c07\u7a7a\u503c\u6392\u5728\u6700\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528<strong>NULLS LAST<\/strong>\u8a9e\u6cd5\uff08\u6839\u64da\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u8a9e\u6cd5\u53ef\u80fd\u6703\u6709\u6240\u4e0d\u540c\uff09\u3002<\/p>\n<pre><code>SELECT name FROM users\nORDER BY name ASC NULLS LAST;<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8collate%e9%80%b2%e8%a1%8c%e8%87%aa%e5%ae%9a%e7%be%a9%e6%8e%92%e5%ba%8f-yZgmnttdGo\">\u4f7f\u7528COLLATE\u9032\u884c\u81ea\u5b9a\u7fa9\u6392\u5e8f<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u6839\u64da\u7279\u5b9a\u7684\u8a9e\u8a00\u6216\u6587\u5316\u9032\u884c\u6392\u5e8f\u3002\u9019\u6642\u53ef\u4ee5\u4f7f\u7528<strong>COLLATE<\/strong>\u95dc\u9375\u5b57\u4f86\u6307\u5b9a\u6392\u5e8f\u898f\u5247\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u5e0c\u671b\u6309\u7167\u82f1\u8a9e\u7684\u5b57\u6bcd\u9806\u5e8f\u9032\u884c\u6392\u5e8f\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT name FROM users\nORDER BY name COLLATE utf8_general_ci;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6392\u5e8f\u7d50\u679c\u7b26\u5408\u82f1\u8a9e\u7684\u6392\u5e8f\u898f\u5247\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u591a\u8a9e\u8a00\u6578\u64da\u6642\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-yZgmnttdGo\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\u9032\u884c\u82f1\u6587\u6392\u5e8f\u662f\u4e00\u500b\u57fa\u672c\u800c\u91cd\u8981\u7684\u64cd\u4f5c\uff0c\u901a\u904e\u4f7f\u7528SQL\u7684ORDER BY\u5b50\u53e5\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u5c0d\u6578\u64da\u9032\u884c\u6392\u5e8f\u3002\u7121\u8ad6\u662f\u8655\u7406\u5927\u5c0f\u5beb\u5b57\u6bcd\u3001\u7279\u6b8a\u5b57\u7b26\u9084\u662f\u7a7a\u503c\uff0cSQL\u90fd\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u6eff\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u548c\u670d\u52d9\u5668\u74b0\u5883\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc<em><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/em>\u6216<em><a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a><\/em>\u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528SQL\u5728\u6578\u64da\u5eab\u4e2d\u9032\u884c\u82f1\u6587\u6392\u5e8f\uff0c\u638c\u63e1\u6392\u5e8f\u8a9e\u53e5\u548c\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\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-175429","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175429","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=175429"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175429\/revisions"}],"predecessor-version":[{"id":175430,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175429\/revisions\/175430"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}