{"id":48595,"date":"2024-12-02T14:10:39","date_gmt":"2024-12-02T06:10:39","guid":{"rendered":"https:\/\/fwq.ai\/blog\/48595\/"},"modified":"2024-12-02T14:10:39","modified_gmt":"2024-12-02T06:10:39","slug":"%e5%9f%ba%e4%ba%8e%e7%8a%b6%e6%80%81%e5%a6%82%e4%bd%95%e5%af%b9%e8%ae%a2%e5%8d%95%e8%bf%9b%e8%a1%8c%e6%8e%92%e5%ba%8f%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/48595\/","title":{"rendered":"\u57fa\u4e8e\u72b6\u6001\u5982\u4f55\u5bf9\u8ba2\u5355\u8fdb\u884c\u6392\u5e8f\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u57fa\u4e8e\u72b6\u6001\u5982\u4f55\u5bf9\u8ba2\u5355\u8fdb\u884c\u6392\u5e8f\uff1f<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7c73\u4e91\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2a\u6587\u7ae0\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300a\u57fa\u4e8e\u72b6\u6001\u5982\u4f55\u5bf9\u8ba2\u5355\u8fdb\u884c\u6392\u5e8f\uff1f\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241028\/1730110891671f65ab48028.jpg\" class=\"aligncenter\" title=\"\u57fa\u4e8e\u72b6\u6001\u5982\u4f55\u5bf9\u8ba2\u5355\u8fdb\u884c\u6392\u5e8f\uff1f\u63d2\u56fe\" alt=\"\u57fa\u4e8e\u72b6\u6001\u5982\u4f55\u5bf9\u8ba2\u5355\u8fdb\u884c\u6392\u5e8f\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u57fa\u4e8e\u72b6\u6001\u7684\u8ba2\u5355\u6392\u5e8f\uff1a\u4f18\u5148\u663e\u793a\u201c\u5f85\u64cd\u4f5c\u201d\uff0c\u6700\u540e\u663e\u793a\u201c\u64a4\u9500\u201d<\/strong><\/p>\n<p><strong>\u95ee\u9898\u63cf\u8ff0\uff1a<\/strong><\/p>\n<p>\u6709\u4e00\u4e2a\u8ba2\u5355\u8868\uff0c\u5305\u542b\u8ba2\u5355\u72b6\u6001\u5b57\u6bb5\u3002\u9700\u8981\u6839\u636e\u7279\u5b9a\u7684\u6392\u5e8f\u89c4\u5219\u8fdb\u884c\u6392\u5e8f\uff1a<\/p>\n<ul>\n<li>\u201c\u5f85\u64cd\u4f5c\u201d\u72b6\u6001\u7684\u8ba2\u5355\u59cb\u7ec8\u6392\u5728\u6700\u524d\u9762\u3002<\/li>\n<li>\u201c\u64a4\u9500\u201d\u72b6\u6001\u7684\u8ba2\u5355\u59cb\u7ec8\u6392\u5728\u6700\u540e\u9762\u3002<\/li>\n<li>\u5176\u4ed6\u72b6\u6001\u6309\u5347\u5e8f\u6392\u5217\u3002<\/li>\n<\/ul>\n<p><strong>\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n<p><strong>mysql \u4e2d\u7684\u5b9e\u73b0\uff1a<\/strong><\/p>\n<pre>SELECT *\nFROM (\n    SELECT\n        CASE\n            WHEN status = 2 THEN 7  -- \u5c06\"\u5f85\u64cd\u4f5c\"\u6620\u5c04\u4e3a\u6700\u9ad8\u7684\u6392\u5e8f\u503c7\n            WHEN status = -1 THEN -1 -- \u5c06\"\u64a4\u9500\"\u6620\u5c04\u4e3a\u6700\u4f4e\u7684\u6392\u5e8f\u503c-1\n            ELSE status           -- \u5176\u4ed6\u72b6\u6001\u4fdd\u6301\u4e0d\u53d8\n        END AS newStatus,  -- \u521b\u5efa\u6392\u5e8f\u7684\u8f85\u52a9\u5217\n        status              -- \u4fdd\u7559\u539f\u59cb\u72b6\u6001\u5217\n    FROM m_table\n) m\nORDER BY newStatus DESC;  -- \u6839\u636e\u8f85\u52a9\u5217\u964d\u5e8f\u6392\u5217<\/pre>\n<p>\u6b64\u67e5\u8be2\u5c06\u521b\u5efa\u4e00\u4e2a\u4e34\u65f6\u8868\uff0c\u5c06\u76ee\u6807\u72b6\u6001\u6620\u5c04\u5230\u8f85\u52a9\u6392\u5e8f\u5217 newstatus\u3002\u7136\u540e\uff0c\u5b83\u6839\u636e newstatus \u5217\u964d\u5e8f\u5bf9\u7ed3\u679c\u8fdb\u884c\u6392\u5e8f\uff0c\u6709\u6548\u5730\u5c06\u201c\u5f85\u64cd\u4f5c\u201d\u72b6\u6001\u7f6e\u4e8e\u9876\u90e8\uff0c\u201c\u64a4\u9500\u201d\u72b6\u6001\u7f6e\u4e8e\u5e95\u90e8\uff0c\u540c\u65f6\u6309\u7167\u5176\u4ed6\u72b6\u6001\u7684\u5347\u5e8f\u6392\u5217\u3002<\/p>\n<p><strong>\u7ed3\u8bba\uff1a<\/strong><\/p>\n<p>\u901a\u8fc7\u4f7f\u7528 case \u8bed\u53e5\u548c\u8f85\u52a9\u6392\u5e8f\u5217\uff0c\u53ef\u4ee5\u5728 mysql \u4e2d\u5b9e\u73b0\u590d\u6742\u7684\u8ba2\u5355\u6392\u5e8f\u89c4\u5219\uff0c\u5305\u62ec\u5c06\u7279\u5b9a\u72b6\u6001\u4f18\u5148\u663e\u793a\u6216\u7f6e\u4e8e\u5e95\u90e8\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u57fa\u4e8e\u72b6\u6001\u5982\u4f55\u5bf9\u8ba2\u5355\u8fdb\u884c\u6392\u5e8f\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6587\u7ae0\u77e5\u8bc6\uff01<\/p>\n<p> \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1aphp \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb \u5220\u9664<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u57fa\u4e8e\u72b6\u6001\u5982\u4f55\u5bf9\u8ba2\u5355\u8fdb\u884c\u6392\u5e8f\uff1f \u6536\u85cf \u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7c73\u4e91\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2a\u6587\u7ae0\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300a\u57fa\u4e8e\u72b6\u6001\u5982\u4f55\u5bf9\u8ba2\u5355\u8fdb\u884c\u6392\u5e8f\uff1f\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01 \u57fa\u4e8e\u72b6\u6001\u7684\u8ba2\u5355\u6392\u5e8f\uff1a\u4f18\u5148\u663e\u793a\u201c\u5f85\u64cd\u4f5c\u201d\uff0c\u6700\u540e\u663e\u793a\u201c\u64a4\u9500\u201d \u95ee\u9898\u63cf\u8ff0\uff1a \u6709\u4e00\u4e2a\u8ba2\u5355\u8868\uff0c\u5305\u542b\u8ba2\u5355\u72b6\u6001\u5b57\u6bb5\u3002\u9700\u8981\u6839\u636e\u7279\u5b9a\u7684\u6392\u5e8f\u89c4\u5219\u8fdb\u884c\u6392\u5e8f\uff1a \u201c\u5f85\u64cd\u4f5c\u201d\u72b6\u6001\u7684\u8ba2\u5355\u59cb\u7ec8\u6392\u5728\u6700\u524d\u9762\u3002 \u201c\u64a4\u9500\u201d\u72b6\u6001\u7684\u8ba2\u5355\u59cb\u7ec8\u6392\u5728\u6700\u540e\u9762\u3002 \u5176\u4ed6\u72b6\u6001\u6309\u5347\u5e8f\u6392\u5217\u3002 \u89e3\u51b3\u65b9\u6848\uff1a mysql \u4e2d\u7684\u5b9e\u73b0\uff1a SELECT * FROM ( SELECT CASE WHEN status = 2 THEN 7 &#8212; \u5c06&#8221;\u5f85\u64cd\u4f5c&#8221;\u6620\u5c04\u4e3a\u6700\u9ad8\u7684\u6392\u5e8f\u503c7 WHEN status = -1 THEN -1 &#8212; \u5c06&#8221;\u64a4\u9500&#8221;\u6620\u5c04\u4e3a\u6700\u4f4e\u7684\u6392\u5e8f\u503c-1 ELSE status &#8212; \u5176\u4ed6\u72b6\u6001\u4fdd\u6301\u4e0d\u53d8 END AS newStatus, &#8212; \u521b\u5efa\u6392\u5e8f\u7684\u8f85\u52a9\u5217 status &#8212; \u4fdd\u7559\u539f\u59cb\u72b6\u6001\u5217 FROM m_table ) m ORDER BY newStatus DESC; &#8212; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-48595","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/48595","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=48595"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/48595\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=48595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=48595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=48595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}