{"id":96334,"date":"2024-10-20T08:33:16","date_gmt":"2024-10-20T00:33:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96334\/"},"modified":"2024-10-20T08:33:17","modified_gmt":"2024-10-20T00:33:17","slug":"order-by-%e7%9a%84%e9%ab%98%e7%b4%9a%e7%94%a8%e6%b3%95%ef%bc%8c%e4%bd%a0%e5%ad%b8%e6%9c%83%e4%ba%86%e5%97%8e","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96334\/","title":{"rendered":"Order By \u7684\u9ad8\u7d1a\u7528\u6cd5\uff0c\u4f60\u5b78\u6703\u4e86\u55ce"},"content":{"rendered":"

Order By \u7684\u9ad8\u7d1a\u7528\u6cd5\uff0c\u4f60\u5b78\u6703\u4e86\u55ce<\/h1>\n

\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u7528\u4f86\u67e5\u8a62\u548c\u64cd\u4f5c\u8cc7\u6599\u7684\u4e3b\u8981\u5de5\u5177\u3002\u5176\u4e2d\uff0cORDER BY<\/code> \u5b50\u53e5\u662f\u7528\u4f86\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u6392\u5e8f\u7684\u91cd\u8981\u529f\u80fd\u3002\u96d6\u7136\u5927\u591a\u6578\u4eba\u90fd\u77e5\u9053\u5982\u4f55\u4f7f\u7528 ORDER BY<\/code> \u4f86\u9032\u884c\u57fa\u672c\u7684\u5347\u5e8f\u6216\u964d\u5e8f\u6392\u5e8f\uff0c\u4f46\u5176\u5be6\u5b83\u9084\u6709\u8a31\u591a\u9ad8\u7d1a\u7528\u6cd5\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u8655\u7406\u8cc7\u6599\u3002<\/p>\n

\u57fa\u672c\u7528\u6cd5\u56de\u9867<\/h2>\n

\u5728\u958b\u59cb\u6df1\u5165\u9ad8\u7d1a\u7528\u6cd5\u4e4b\u524d\uff0c\u6211\u5011\u5148\u56de\u9867\u4e00\u4e0b ORDER BY<\/code> \u7684\u57fa\u672c\u7528\u6cd5\u3002\u6700\u7c21\u55ae\u7684\u5f62\u5f0f\u5982\u4e0b\uff1a<\/p>\n

SELECT * FROM customers ORDER BY last_name ASC;<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u6703\u6839\u64da\u5ba2\u6236\u7684\u59d3\u6c0f\u9032\u884c\u5347\u5e8f\u6392\u5e8f\u3002\u5982\u679c\u60f3\u8981\u964d\u5e8f\u6392\u5e8f\uff0c\u53ea\u9700\u5c07 ASC<\/code> \u6539\u70ba DESC<\/code>\u3002<\/p>\n
\u591a\u91cd\u6392\u5e8f<\/h2>\n
\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u7d93\u5e38\u9700\u8981\u6839\u64da\u591a\u500b\u6b04\u4f4d\u9032\u884c\u6392\u5e8f\u3002\u9019\u6642\u53ef\u4ee5\u5728 ORDER BY<\/code> \u4e2d\u6307\u5b9a\u591a\u500b\u6b04\u4f4d\uff0c\u4e26\u70ba\u6bcf\u500b\u6b04\u4f4d\u8a2d\u7f6e\u6392\u5e8f\u65b9\u5f0f\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT * FROM employees ORDER BY department ASC, salary DESC;<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u6703\u5148\u6839\u64da\u90e8\u9580\u9032\u884c\u5347\u5e8f\u6392\u5e8f\uff0c\u7136\u5f8c\u5728\u6bcf\u500b\u90e8\u9580\u5167\u6839\u64da\u85aa\u6c34\u9032\u884c\u964d\u5e8f\u6392\u5e8f\u3002\u9019\u6a23\u7684\u6392\u5e8f\u65b9\u5f0f\u80fd\u5920\u8b93\u6211\u5011\u66f4\u6e05\u6670\u5730\u770b\u5230\u6bcf\u500b\u90e8\u9580\u5167\u7684\u85aa\u8cc7\u7d50\u69cb\u3002<\/p>\n
\u4f7f\u7528\u8868\u9054\u5f0f\u6392\u5e8f<\/h2>\n
\u9664\u4e86\u76f4\u63a5\u4f7f\u7528\u6b04\u4f4d\u540d\u5916\uff0cORDER BY<\/code> \u9084\u652f\u6301\u4f7f\u7528\u8868\u9054\u5f0f\u9032\u884c\u6392\u5e8f\u3002\u4f8b\u5982\uff0c\u6211\u5011\u53ef\u4ee5\u6839\u64da\u67d0\u500b\u8a08\u7b97\u7d50\u679c\u9032\u884c\u6392\u5e8f\uff1a<\/p>\n
SELECT product_name, price, quantity FROM products ORDER BY price * quantity DESC;<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u6703\u6839\u64da\u6bcf\u500b\u7522\u54c1\u7684\u7e3d\u50f9\uff08\u50f9\u683c\u4e58\u4ee5\u6578\u91cf\uff09\u9032\u884c\u964d\u5e8f\u6392\u5e8f\uff0c\u9019\u6a23\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u5feb\u901f\u627e\u5230\u6700\u5177\u92b7\u552e\u6f5b\u529b\u7684\u7522\u54c1\u3002<\/p>\n
\u4f7f\u7528 CASE \u8a9e\u53e5\u9032\u884c\u689d\u4ef6\u6392\u5e8f<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u4f86\u6c7a\u5b9a\u6392\u5e8f\u7684\u512a\u5148\u7d1a\u3002\u9019\u6642\u53ef\u4ee5\u4f7f\u7528 CASE<\/code> \u8a9e\u53e5\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT * FROM orders ORDER BY \n    CASE \n        WHEN status = 'shipped' THEN 1\n        WHEN status = 'pending' THEN 2\n        ELSE 3\n    END;<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u6703\u6839\u64da\u8a02\u55ae\u7684\u72c0\u614b\u9032\u884c\u6392\u5e8f\uff0c\u5df2\u767c\u8ca8\u7684\u8a02\u55ae\u6392\u5728\u6700\u524d\u9762\uff0c\u5f85\u8655\u7406\u7684\u8a02\u55ae\u6392\u5728\u4e2d\u9593\uff0c\u5176\u4ed6\u72c0\u614b\u7684\u8a02\u55ae\u6392\u5728\u6700\u5f8c\u3002<\/p>\n
\u6392\u5e8f NULL \u503c<\/h2>\n
\u5728\u8cc7\u6599\u5eab\u4e2d\uff0cNULL \u503c\u7684\u6392\u5e8f\u884c\u70ba\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u7d50\u679c\u3002\u4f7f\u7528 ORDER BY<\/code> \u6642\uff0c\u53ef\u4ee5\u6307\u5b9a NULL \u503c\u7684\u6392\u5e8f\u65b9\u5f0f\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT * FROM users ORDER BY last_login ASC NULLS LAST;<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u6703\u5c07\u6700\u5f8c\u767b\u9304\u6642\u9593\u70ba NULL \u7684\u7528\u6236\u6392\u5728\u6700\u5f8c\u3002\u4e0d\u540c\u7684\u8cc7\u6599\u5eab\u7cfb\u7d71\u5c0d\u65bc NULL \u503c\u7684\u6392\u5e8f\u65b9\u5f0f\u53ef\u80fd\u6709\u6240\u4e0d\u540c\uff0c\u56e0\u6b64\u5728\u4f7f\u7528\u6642\u9700\u6839\u64da\u5177\u9ad4\u60c5\u6cc1\u9032\u884c\u8abf\u6574\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u638c\u63e1 ORDER BY<\/code> \u7684\u9ad8\u7d1a\u7528\u6cd5\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u9748\u6d3b\u5730\u8655\u7406\u8cc7\u6599\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\u3002\u7121\u8ad6\u662f\u591a\u91cd\u6392\u5e8f\u3001\u4f7f\u7528\u8868\u9054\u5f0f\u3001\u689d\u4ef6\u6392\u5e8f\u9084\u662f\u8655\u7406 NULL \u503c\uff0c\u9019\u4e9b\u6280\u5de7\u90fd\u80fd\u8b93\u4f60\u7684 SQL \u67e5\u8a62\u66f4\u52a0\u7cbe\u78ba\u548c\u9ad8\u6548\u3002\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 \u9999\u6e2fVPS<\/a> \u670d\u52d9\u4f86\u652f\u6301\u4f60\u7684\u8cc7\u6599\u5eab\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22 Order By \u7684\u9ad8\u7d1a\u7528\u6cd5\uff0c\u63d0\u5347 SQL \u67e5\u8a62\u6548\u7387\uff0c\u8b93\u6578\u64da\u5206\u6790\u66f4\u7cbe\u6e96\u3002\u4f60\u5b78\u6703\u4e86\u55ce\uff1f\u7acb\u5373\u4e86\u89e3\uff01<\/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-96334","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96334","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=96334"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96334\/revisions"}],"predecessor-version":[{"id":96335,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96334\/revisions\/96335"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96334"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96334"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96334"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}