{"id":200807,"date":"2025-05-06T09:09:44","date_gmt":"2025-05-06T01:09:44","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200807\/"},"modified":"2025-05-06T09:09:44","modified_gmt":"2025-05-06T01:09:44","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-case-%e8%af%ad%e5%8f%a5%e5%90%88%e5%b9%b6%e5%a4%9a%e4%b8%aa-sql-%e6%9f%a5%e8%af%a2%e4%bb%a5%e7%94%9f%e6%88%90%e6%98%93%e4%ba%8e%e9%98%85%e8%af%bb%e7%9a%84%e6%8a%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200807\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 CASE \u8bed\u53e5\u5408\u5e76\u591a\u4e2a SQL \u67e5\u8be2\u4ee5\u751f\u6210\u6613\u4e8e\u9605\u8bfb\u7684\u62a5\u544a\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u5982\u4f55\u4f7f\u7528 CASE \u8bed\u53e5\u5408\u5e76\u591a\u4e2a SQL \u67e5\u8be2\u4ee5\u751f\u6210\u6613\u4e8e\u9605\u8bfb\u7684\u62a5\u544a\uff1f<\/h1>\n<p>\u600e\u4e48\u5165\u95e8\u6570\u636e\u5e93\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762\u4e3b\u673a\u5b9d\u8d1d\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300a\u5982\u4f55\u4f7f\u7528 CASE \u8bed\u53e5\u5408\u5e76\u591a\u4e2a SQL \u67e5\u8be2\u4ee5\u751f\u6210\u6613\u4e8e\u9605\u8bfb\u7684\u62a5\u544a\uff1f\u300b\uff0c\u6d89\u53ca\u5230\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241115\/17316639346737183e305fc.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5408\u5e76 sql \u67e5\u8be2\u4ee5\u83b7\u53d6\u7528\u4e8e\u62a5\u544a\u7684\u6570\u636e<\/strong><\/p>\n<p>\u5728 oracle \u6570\u636e\u5e93\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u4ece\u591a\u4e2a\u8868\u6216\u89c6\u56fe\u4e2d\u83b7\u53d6\u6570\u636e\u4ee5\u751f\u6210\u62a5\u544a\u3002\u6709\u65f6\uff0c\u6211\u4eec\u9700\u8981\u5408\u5e76\u591a\u4e2a sql \u67e5\u8be2\u4ee5\u83b7\u53d6\u6240\u9700\u6570\u636e\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u6709\u5982\u4e0b\u4e09\u6761 sql \u67e5\u8be2\uff1a<\/p>\n<pre>select count(1) as flownum from ccform_debit_all where cf_acctime &gt; to_char(sysdate,'yyyy-mm-dd');\nselect count(1) as flownummonth from ccform_debit_all where cf_acctime &gt; to_char(sysdate,'yyyy-mm');\nselect count(1) as flownumtotal from ccform_debit_all where cf_acctime &gt; to_char(sysdate,'yyyy');<\/pre>\n<p>\u8fd9\u4e9b\u67e5\u8be2\u5206\u522b\u8fd4\u56de\u4eca\u5929\u3001\u672c\u6708\u548c\u4eca\u5e74\u7684\u6d41\u7a0b\u6570\u91cf\u3002\u4e3a\u4e86\u751f\u6210\u4e00\u4e2a\u62a5\u544a\uff0c\u6211\u4eec\u9700\u8981\u5408\u5e76\u8fd9\u4e9b\u67e5\u8be2\u5e76\u4ee5\u4e00\u79cd\u66f4\u7b80\u6d01\u7684\u65b9\u5f0f\u663e\u793a\u7ed3\u679c\u3002\u4f7f\u7528 case \u8bed\u53e5\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u6240\u6709\u4e09\u4e2a\u67e5\u8be2\u5408\u5e76\u5230\u4e00\u4e2a\u67e5\u8be2\u4e2d\uff1a<\/p>\n<pre>select count(case when to_char(cf_acctime, 'yyyy-MM-dd') &gt; to_char(sysdate, 'yyyy-MM-dd') then 1 end) as flowNum,\n       count(case when to_char(cf_acctime, 'yyyy-MM') &gt; to_char(sysdate, 'yyyy-MM') then 1 end)       as flowNumMonth,\n       count(case when to_char(cf_acctime, 'yyyy') &gt; to_char(sysdate, 'yyyy') then 1 end)             as flowNumTotal\nfrom ccform_debit_all<\/pre>\n<p>\u8fd9\u4e2a\u67e5\u8be2\u5c06\u8fd4\u56de\u4e09\u4e2a\u5217\uff1aflownum\uff08\u4eca\u5929\u6d41\u7a0b\u6570\u91cf\uff09\u3001flownummonth\uff08\u672c\u6708\u6d41\u7a0b\u6570\u91cf\uff09\u548c flownumtotal\uff08\u4eca\u5e74\u6d41\u7a0b\u6570\u91cf\uff09\u3002\u7ed3\u679c\u4ee5\u7b80\u6d01\u6613\u4e8e\u9605\u8bfb\u7684\u683c\u5f0f\u663e\u793a\uff0c\u975e\u5e38\u9002\u5408\u751f\u6210\u62a5\u544a\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u5982\u4f55\u4f7f\u7528 CASE \u8bed\u53e5\u5408\u5e76\u591a\u4e2a SQL \u67e5\u8be2\u4ee5\u751f\u6210\u6613\u4e8e\u9605\u8bfb\u7684\u62a5\u544a\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6570\u636e\u5e93\u77e5\u8bc6\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u4f7f\u7528 CASE \u8bed\u53e5\u5408\u5e76\u591a\u4e2a&#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-200807","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200807","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=200807"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200807\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200807"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200807"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200807"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}