{"id":7900,"date":"2024-11-14T12:34:35","date_gmt":"2024-11-14T04:34:35","guid":{"rendered":"https:\/\/fwq.ai\/blog\/7900\/"},"modified":"2024-11-14T12:34:35","modified_gmt":"2024-11-14T04:34:35","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-sqlite-%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%ad%e6%a0%b9%e6%8d%ae-id-%e5%85%b3%e8%81%94%e6%9f%a5%e8%af%a2%e4%b8%a4%e4%b8%aa%e8%a1%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/7900\/","title":{"rendered":"\u5982\u4f55\u5728 SQLite \u6570\u636e\u5e93\u4e2d\u6839\u636e ID \u5173\u8054\u67e5\u8be2\u4e24\u4e2a\u8868\uff1f"},"content":{"rendered":"

\"\u5982\u4f55\u5728<\/p>\n

\u5982\u4f55\u5728 sql \u4e2d\u67e5\u8be2\u4e24\u4e2a\u8868\u5e76\u6839\u636e id \u5173\u8054\u8bb0\u5f55<\/strong><\/p>\n

\u672c\u95ee\u7b54\u65e8\u5728\u89e3\u91ca\u5982\u4f55\u4f7f\u7528 sqlite \u4e2d\u7684 join \u8bed\u53e5\u6765\u4e00\u6b21\u6027\u67e5\u8be2\u4e24\u4e2a\u8868\u5e76\u6839\u636e\u7279\u5b9a id \u5173\u8054\u8bb0\u5f55\u3002<\/p>\n

\u95ee\u9898\uff1a<\/strong><\/p>\n

\u5728\u62e5\u6709\u201csites\u201d\u548c\u201csites_item_list\u201d\u4e24\u8868\u7684 sqlite \u6570\u636e\u5e93\u4e2d\uff0c\u5982\u4f55\u6839\u636e\u201csites\u201d\u8868\u7684 id \u67e5\u8be2\u76f8\u5e94\u201csites_item_list\u201d\u8868\u4e2d\u7684\u8bb0\u5f55\uff1f<\/p>\n

\u7b54\u6848\uff1a<\/strong><\/p>\n

\u8981\u5b9e\u73b0\u8fd9\u4e00\u76ee\u6807\uff0c\u53ef\u4ee5\u4f7f\u7528 join \u8bed\u53e5\uff0c\u5b83\u5141\u8bb8\u5728\u67e5\u8be2\u4e2d\u8fde\u63a5\u591a\u4e2a\u8868\u3002\u5173\u952e\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n

    \n
  1. \u786e\u5b9a\u8fde\u63a5\u952e\uff1a<\/strong>\u786e\u5b9a\u8fde\u63a5\u4e24\u4e2a\u8868\u7684\u5171\u540c\u5b57\u6bb5\u6216\u5217\uff0c\u5728\u672c\u4f8b\u4e2d\u662f\u201cid\u201d\u5217\u3002<\/li>\n
  2. \n

    \u4f7f\u7528 join \u5b50\u53e5\uff1a<\/strong>\u5728\u67e5\u8be2\u4e2d\u4f7f\u7528 join \u5b50\u53e5\u8fde\u63a5\u4e24\u4e2a\u8868\u3002\u5e38\u89c1\u7684 join \u7c7b\u578b\u6709\uff1a<\/p>\n

      \n
    • inner join\uff1a\u4ec5\u8fd4\u56de\u4e24\u8868\u4e2d\u5339\u914d\u5b57\u6bb5\u7684\u8bb0\u5f55\u3002<\/li>\n
    • left join\uff1a\u8fd4\u56de\u6240\u6709\u5de6\u8868\u8bb0\u5f55\uff0c\u5373\u4f7f\u53f3\u8868\u4e2d\u6ca1\u6709\u5339\u914d\u9879\u3002<\/li>\n
    • right join\uff1a\u8fd4\u56de\u6240\u6709\u53f3\u8868\u8bb0\u5f55\uff0c\u5373\u4f7f\u5de6\u8868\u4e2d\u6ca1\u6709\u5339\u914d\u9879\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n

      \u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/p>\n

      SELECT * \nFROM sites AS s\nINNER JOIN sites_item_list AS sil ON s.id = sil.site_id\nWHERE s.id = 1;<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \u6b64\u67e5\u8be2\u5c06\u8fd4\u56de\u201csites\u201d\u8868\u4e2d id \u4e3a 1 \u7684\u8bb0\u5f55\u4ee5\u53ca\u76f8\u5e94\u7684\u201csites_item_list\u201d\u8868\u4e2d\u7684\u6240\u6709\u5339\u914d\u8bb0\u5f55\u3002<\/p>\n
      \u76f8\u5173\u77e5\u8bc6\u70b9\uff1a<\/strong><\/p>\n
        \n
      • sql join \u8bed\u53e5<\/li>\n
      • inner join\u3001left join \u548c right join<\/li>\n
      • sqlite \u8868\u8fde\u63a5\u8bed\u6cd5<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u5728 SQLite \u6570\u636e\u5e93\u4e2d\u6839\u636e ID \u5173\u8054\u67e5\u8be2\u4e24\u4e2a\u8868\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        \u5982\u4f55\u5728 sql \u4e2d\u67e5\u8be2\u4e24\u4e2a\u8868\u5e76\u6839\u636e id \u5173\u8054\u8bb0\u5f55 \u672c\u95ee\u7b54\u65e8\u5728\u89e3\u91ca\u5982\u4f55\u4f7f\u7528 sqlite \u4e2d\u7684 join \u8bed\u53e5\u6765\u4e00\u6b21\u6027\u67e5\u8be2\u4e24\u4e2a\u8868\u5e76\u6839\u636e\u7279\u5b9a id \u5173\u8054\u8bb0\u5f55\u3002 \u95ee\u9898\uff1a \u5728\u62e5\u6709\u201csites\u201d\u548c\u201csites_item_list\u201d\u4e24\u8868\u7684 sqlite \u6570\u636e\u5e93\u4e2d\uff0c\u5982\u4f55\u6839\u636e\u201csites\u201d\u8868\u7684 id \u67e5\u8be2\u76f8\u5e94\u201csites_item_list\u201d\u8868\u4e2d\u7684\u8bb0\u5f55\uff1f \u7b54\u6848\uff1a \u8981\u5b9e\u73b0\u8fd9\u4e00\u76ee\u6807\uff0c\u53ef\u4ee5\u4f7f\u7528 join \u8bed\u53e5\uff0c\u5b83\u5141\u8bb8\u5728\u67e5\u8be2\u4e2d\u8fde\u63a5\u591a\u4e2a\u8868\u3002\u5173\u952e\u6b65\u9aa4\u5982\u4e0b\uff1a \u786e\u5b9a\u8fde\u63a5\u952e\uff1a\u786e\u5b9a\u8fde\u63a5\u4e24\u4e2a\u8868\u7684\u5171\u540c\u5b57\u6bb5\u6216\u5217\uff0c\u5728\u672c\u4f8b\u4e2d\u662f\u201cid\u201d\u5217\u3002 \u4f7f\u7528 join \u5b50\u53e5\uff1a\u5728\u67e5\u8be2\u4e2d\u4f7f\u7528 join \u5b50\u53e5\u8fde\u63a5\u4e24\u4e2a\u8868\u3002\u5e38\u89c1\u7684 join \u7c7b\u578b\u6709\uff1a inner join\uff1a\u4ec5\u8fd4\u56de\u4e24\u8868\u4e2d\u5339\u914d\u5b57\u6bb5\u7684\u8bb0\u5f55\u3002 left join\uff1a\u8fd4\u56de\u6240\u6709\u5de6\u8868\u8bb0\u5f55\uff0c\u5373\u4f7f\u53f3\u8868\u4e2d\u6ca1\u6709\u5339\u914d\u9879\u3002 right join\uff1a\u8fd4\u56de\u6240\u6709\u53f3\u8868\u8bb0\u5f55\uff0c\u5373\u4f7f\u5de6\u8868\u4e2d\u6ca1\u6709\u5339\u914d\u9879\u3002 \u793a\u4f8b\u4ee3\u7801\uff1a SELECT * FROM sites AS s INNER JOIN sites_item_list AS sil ON s.id = sil.site_id WHERE s.id = […]<\/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-7900","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7900","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=7900"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7900\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=7900"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=7900"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=7900"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}