{"id":27128,"date":"2024-11-24T14:56:24","date_gmt":"2024-11-24T06:56:24","guid":{"rendered":"https:\/\/fwq.ai\/blog\/27128\/"},"modified":"2024-11-24T14:56:24","modified_gmt":"2024-11-24T06:56:24","slug":"%e6%95%b0%e6%8d%ae%e5%ba%93%e6%9f%a5%e8%af%a2%e4%b8%ad%ef%bc%8c%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b0%e5%92%8c%e6%8e%92%e5%ba%8f%e5%88%b0%e5%ba%95%e8%b0%81%e5%85%88%e6%89%a7%e8%a1%8c%ef%bc%9f-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/27128\/","title":{"rendered":"\u6570\u636e\u5e93\u67e5\u8be2\u4e2d\uff0c\u805a\u5408\u51fd\u6570\u548c\u6392\u5e8f\u5230\u5e95\u8c01\u5148\u6267\u884c\uff1f"},"content":{"rendered":"

\"\u6570\u636e\u5e93\u67e5\u8be2\u4e2d\uff0c\u805a\u5408\u51fd\u6570\u548c\u6392\u5e8f\u5230\u5e95\u8c01\u5148\u6267\u884c\uff1f\u63d2\u56fe\"<\/p>\n

\u6570\u636e\u5e93\u67e5\u8be2\u4f18\u5316\uff1a\u4e0e\u6392\u5e8f\u7684\u6267\u884c\u987a\u5e8f<\/strong><\/p>\n

\u5728\u6784\u5efa\u6570\u636e\u5e93\u67e5\u8be2\u8bed\u53e5\u65f6\uff0c\u6709\u65f6\u4f1a\u9047\u5230\u805a\u5408\u51fd\u6570\u548c\u6392\u5e8f\u540c\u65f6\u4f7f\u7528\u7684\u573a\u666f\uff0c\u4f8b\u5982\uff1a”select sum(column) from table order by column desc”\u3002\u8fd9\u4e2a\u95ee\u9898\u5c31\u5f15\u51fa\u7591\u95ee\uff1a\u5728\u8fd9\u6837\u7684\u67e5\u8be2\u8bed\u53e5\u4e2d\uff0c\u805a\u5408\u51fd\u6570\u548c\u6392\u5e8f\u8c01\u5148\u6267\u884c\uff1f<\/p>\n

\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u5728\u6570\u636e\u5e93\u5904\u7406\u67e5\u8be2\u8bed\u53e5\u65f6\uff0c\u6267\u884c\u987a\u5e8f\u5982\u4e0b\uff1a<\/p>\n

    \n
  1. \u4ece\u8868\u4e2d\u9009\u53d6\u6ee1\u8db3\u6761\u4ef6\u7684\u884c<\/li>\n
  2. \u5bf9\u9009\u53d6\u7684\u884c\u6267\u884c\u805a\u5408\u51fd\u6570\uff0c\u5c06\u591a\u884c\u7684\u6570\u636e\u805a\u5408\u6210\u4e00\u4e2a\u7ed3\u679c<\/li>\n
  3. \u5bf9\u805a\u5408\u7ed3\u679c\u8fdb\u884c\u6392\u5e8f<\/li>\n<\/ol>\n

    \u56e0\u6b64\uff0c\u5728\u6240\u7ed9\u7684\u793a\u4f8b\u67e5\u8be2\u8bed\u53e5\u4e2d\uff0c\u805a\u5408\u51fd\u6570sum()\u5c06\u9996\u5148\u6267\u884c\uff0c\u5c06\u8868\u4e2dcolumn\u5217\u7684\u503c\u76f8\u52a0\uff0c\u5f97\u5230\u4e00\u4e2a\u6c47\u603b\u503c\u3002\u7136\u540e\uff0c\u6392\u5e8f\u64cd\u4f5c\u624d\u5c06\u8fd9\u4e2a\u6c47\u603b\u503c\u6309\u964d\u5e8f\u3002<\/p>\n

    \u8fd9\u6837\u7684\u6267\u884c\u987a\u5e8f\u4fdd\u8bc1\u4e86\u6392\u5e8f\u7684\u51c6\u786e\u6027\uff0c\u56e0\u4e3a\u5728\u6392\u5e8f\u4e4b\u524d\uff0c\u805a\u5408\u51fd\u6570\u5df2\u7ecf\u5c06\u6570\u636e\u805a\u5408\u6210\u4e86\u4e00\u4e2a\u5355\u4e00\u503c\uff0c\u6392\u5e8f\u64cd\u4f5c\u53ef\u4ee5\u5bf9\u8fd9\u4e2a\u5355\u4e00\u503c\u8fdb\u884c\u53ef\u9760\u7684\u6bd4\u8f83\u3002\u5982\u679c\u6392\u5e8f\u5148\u4e8e\u805a\u5408\u51fd\u6570\u6267\u884c\uff0c\u90a3\u4e48\u805a\u5408\u7684\u7ed3\u679c\u53ef\u80fd\u4e0d\u6b63\u786e\uff0c\u56e0\u4e3a\u6392\u5e8f\u4f1a\u5f71\u54cd\u9009\u53d6\u884c\u7684\u987a\u5e8f\uff0c\u4ece\u800c\u5f71\u54cd\u805a\u5408\u51fd\u6570\u7684\u8ba1\u7b97\u3002<\/p>\n

    \u4ee5\u4e0a\u5c31\u662f\u6570\u636e\u5e93\u67e5\u8be2\u4e2d\uff0c\u548c\u6392\u5e8f\u5230\u5e95\u8c01\u5148\u6267\u884c\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":"

    \u6570\u636e\u5e93\u67e5\u8be2\u4f18\u5316\uff1a\u4e0e\u6392\u5e8f\u7684\u6267\u884c\u987a\u5e8f \u5728\u6784\u5efa\u6570\u636e\u5e93\u67e5\u8be2\u8bed\u53e5\u65f6\uff0c\u6709\u65f6\u4f1a\u9047\u5230\u805a\u5408\u51fd\u6570\u548c\u6392\u5e8f\u540c\u65f6\u4f7f\u7528\u7684\u573a\u666f\uff0c\u4f8b\u5982\uff1a”select sum(column) from table order by column desc”\u3002\u8fd9\u4e2a\u95ee\u9898\u5c31\u5f15\u51fa\u7591\u95ee\uff1a\u5728\u8fd9\u6837\u7684\u67e5\u8be2\u8bed\u53e5\u4e2d\uff0c\u805a\u5408\u51fd\u6570\u548c\u6392\u5e8f\u8c01\u5148\u6267\u884c\uff1f \u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u5728\u6570\u636e\u5e93\u5904\u7406\u67e5\u8be2\u8bed\u53e5\u65f6\uff0c\u6267\u884c\u987a\u5e8f\u5982\u4e0b\uff1a \u4ece\u8868\u4e2d\u9009\u53d6\u6ee1\u8db3\u6761\u4ef6\u7684\u884c \u5bf9\u9009\u53d6\u7684\u884c\u6267\u884c\u805a\u5408\u51fd\u6570\uff0c\u5c06\u591a\u884c\u7684\u6570\u636e\u805a\u5408\u6210\u4e00\u4e2a\u7ed3\u679c \u5bf9\u805a\u5408\u7ed3\u679c\u8fdb\u884c\u6392\u5e8f \u56e0\u6b64\uff0c\u5728\u6240\u7ed9\u7684\u793a\u4f8b\u67e5\u8be2\u8bed\u53e5\u4e2d\uff0c\u805a\u5408\u51fd\u6570sum()\u5c06\u9996\u5148\u6267\u884c\uff0c\u5c06\u8868\u4e2dcolumn\u5217\u7684\u503c\u76f8\u52a0\uff0c\u5f97\u5230\u4e00\u4e2a\u6c47\u603b\u503c\u3002\u7136\u540e\uff0c\u6392\u5e8f\u64cd\u4f5c\u624d\u5c06\u8fd9\u4e2a\u6c47\u603b\u503c\u6309\u964d\u5e8f\u3002 \u8fd9\u6837\u7684\u6267\u884c\u987a\u5e8f\u4fdd\u8bc1\u4e86\u6392\u5e8f\u7684\u51c6\u786e\u6027\uff0c\u56e0\u4e3a\u5728\u6392\u5e8f\u4e4b\u524d\uff0c\u805a\u5408\u51fd\u6570\u5df2\u7ecf\u5c06\u6570\u636e\u805a\u5408\u6210\u4e86\u4e00\u4e2a\u5355\u4e00\u503c\uff0c\u6392\u5e8f\u64cd\u4f5c\u53ef\u4ee5\u5bf9\u8fd9\u4e2a\u5355\u4e00\u503c\u8fdb\u884c\u53ef\u9760\u7684\u6bd4\u8f83\u3002\u5982\u679c\u6392\u5e8f\u5148\u4e8e\u805a\u5408\u51fd\u6570\u6267\u884c\uff0c\u90a3\u4e48\u805a\u5408\u7684\u7ed3\u679c\u53ef\u80fd\u4e0d\u6b63\u786e\uff0c\u56e0\u4e3a\u6392\u5e8f\u4f1a\u5f71\u54cd\u9009\u53d6\u884c\u7684\u987a\u5e8f\uff0c\u4ece\u800c\u5f71\u54cd\u805a\u5408\u51fd\u6570\u7684\u8ba1\u7b97\u3002 \u4ee5\u4e0a\u5c31\u662f\u6570\u636e\u5e93\u67e5\u8be2\u4e2d\uff0c\u548c\u6392\u5e8f\u5230\u5e95\u8c01\u5148\u6267\u884c\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-27128","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/27128","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=27128"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/27128\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=27128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=27128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=27128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}