{"id":27694,"date":"2024-11-24T11:54:02","date_gmt":"2024-11-24T03:54:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/27694\/"},"modified":"2024-11-24T11:54:02","modified_gmt":"2024-11-24T03:54:02","slug":"%e5%a6%82%e4%bd%95%e6%9f%a5%e8%af%a2%e6%9f%90%e4%b8%aa%e5%85%ac%e5%8f%b8%e7%94%9f%e4%ba%a7%e7%9a%84%e6%89%80%e6%9c%89%e4%ba%a7%e5%93%81%e7%9a%84%e6%9c%80%e6%96%b0%e6%a3%80%e6%b5%8b%e6%8a%a5%e5%91%8a-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/27694\/","title":{"rendered":"\u5982\u4f55\u67e5\u8be2\u67d0\u4e2a\u516c\u53f8\u751f\u4ea7\u7684\u6240\u6709\u4ea7\u54c1\u7684\u6700\u65b0\u68c0\u6d4b\u62a5\u544a\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173130608367021.jpg\" class=\"aligncenter\" title=\"\u5982\u4f55\u67e5\u8be2\u67d0\u4e2a\u516c\u53f8\u751f\u4ea7\u7684\u6240\u6709\u4ea7\u54c1\u7684\u6700\u65b0\u68c0\u6d4b\u62a5\u544a\uff1f\u63d2\u56fe\" alt=\"\u5982\u4f55\u67e5\u8be2\u67d0\u4e2a\u516c\u53f8\u751f\u4ea7\u7684\u6240\u6709\u4ea7\u54c1\u7684\u6700\u65b0\u68c0\u6d4b\u62a5\u544a\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u89e3\u51b3\u591a\u8868\u67e5\u8be2\u6700\u65b0\u68c0\u6d4b\u62a5\u544a\u95ee\u9898<\/strong><\/p>\n<p><strong>\u95ee\u9898\uff1a<\/strong><\/p>\n<p>\u9700\u8981\u6839\u636e\u4ea7\u54c1\u4fe1\u606f\u8868\uff08pro\uff09\u548c\u68c0\u6d4b\u4fe1\u606f\u8868\uff08procheck\uff09\u67e5\u8be2\u67d0\u4e2a\u516c\u53f8\uff08company_id\uff09\u751f\u4ea7\u7684\u6240\u6709\u4ea7\u54c1\u7684\u6700\u65b0\u4e00\u6b21\u68c0\u6d4b\u62a5\u544a\u3002\u73b0\u6709\u7684\u67e5\u8be2\u8bed\u53e5\u65e0\u6cd5\u8fc7\u6ee4\u51fa\u6700\u65b0\u68c0\u6d4b\u62a5\u544a\uff0c\u5bfc\u81f4\u7ed3\u679c\u8fc7\u591a\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6cd5\uff1a<\/strong><\/p>\n<p>\u9996\u5148\uff0c\u9700\u8981\u67e5\u8be2\u51fa procheck \u8868\u4e2d\u6bcf\u4e2a\u4ea7\u54c1\u5bf9\u5e94\u7684\u6700\u65b0 checkdate\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u53e5\uff1a<\/p>\n<pre>select pro_id, max(checkdate) as max_checkdate\nfrom procheck\ngroup by pro_id<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u7136\u540e\uff0c\u5c06\u4e0a\u8ff0\u8bed\u53e5\u4f5c\u4e3a\u4e00\u4e2a\u5b50\u67e5\u8be2\uff0c\u4e0e\u539f\u59cb\u67e5\u8be2\u8bed\u53e5\u8fde\u63a5\uff0c\u6309\u7167 pro_id \u548c checkdate \u8fdb\u884c\u7b5b\u9009\uff0c\u5373\u53ef\u5f97\u5230\u6700\u65b0\u68c0\u6d4b\u62a5\u544a\uff1a<\/p>\n<pre>(\u539f\u59cb\u67e5\u8be2\u8bed\u53e5) t1\nJOIN (\n    SELECT pro_id, MAX(checkdate) AS max_checkdate\n    FROM procheck\n    GROUP BY pro_id\n) t2\nON t1.procheck__pro_id = t2.pro_id AND t1.procheck__checkdate = t2.max_checkdate;<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u67e5\u8be2\u67d0\u4e2a\u516c\u53f8\u751f\u4ea7\u7684\u6240\u6709\u4ea7\u54c1\u7684\u6700\u65b0\u68c0\u6d4b\u62a5\u544a\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u51b3\u591a\u8868\u67e5\u8be2\u6700\u65b0\u68c0\u6d4b\u62a5\u544a\u95ee\u9898 \u95ee\u9898\uff1a \u9700\u8981\u6839\u636e\u4ea7\u54c1\u4fe1\u606f\u8868\uff08pro\uff09\u548c\u68c0\u6d4b\u4fe1\u606f\u8868\uff08procheck\uff09\u67e5\u8be2\u67d0\u4e2a\u516c\u53f8\uff08company_id\uff09\u751f\u4ea7\u7684\u6240\u6709\u4ea7\u54c1\u7684\u6700\u65b0\u4e00\u6b21\u68c0\u6d4b\u62a5\u544a\u3002\u73b0\u6709\u7684\u67e5\u8be2\u8bed\u53e5\u65e0\u6cd5\u8fc7\u6ee4\u51fa\u6700\u65b0\u68c0\u6d4b\u62a5\u544a\uff0c\u5bfc\u81f4\u7ed3\u679c\u8fc7\u591a\u3002 \u89e3\u51b3\u65b9\u6cd5\uff1a \u9996\u5148\uff0c\u9700\u8981\u67e5\u8be2\u51fa procheck \u8868\u4e2d\u6bcf\u4e2a\u4ea7\u54c1\u5bf9\u5e94\u7684\u6700\u65b0 checkdate\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u53e5\uff1a select pro_id, max(checkdate) as max_checkdate from procheck group by pro_id \u767b\u5f55\u540e\u590d\u5236 \u7136\u540e\uff0c\u5c06\u4e0a\u8ff0\u8bed\u53e5\u4f5c\u4e3a\u4e00\u4e2a\u5b50\u67e5\u8be2\uff0c\u4e0e\u539f\u59cb\u67e5\u8be2\u8bed\u53e5\u8fde\u63a5\uff0c\u6309\u7167 pro_id \u548c checkdate \u8fdb\u884c\u7b5b\u9009\uff0c\u5373\u53ef\u5f97\u5230\u6700\u65b0\u68c0\u6d4b\u62a5\u544a\uff1a (\u539f\u59cb\u67e5\u8be2\u8bed\u53e5) t1 JOIN ( SELECT pro_id, MAX(checkdate) AS max_checkdate FROM procheck GROUP BY pro_id ) t2 ON t1.procheck__pro_id = t2.pro_id AND t1.procheck__checkdate = t2.max_checkdate; \u767b\u5f55\u540e\u590d\u5236 \u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u67e5\u8be2\u67d0\u4e2a\u516c\u53f8\u751f\u4ea7\u7684\u6240\u6709\u4ea7\u54c1\u7684\u6700\u65b0\u68c0\u6d4b\u62a5\u544a\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/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-27694","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/27694","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=27694"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/27694\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=27694"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=27694"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=27694"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}