{"id":22790,"date":"2024-11-21T13:19:35","date_gmt":"2024-11-21T05:19:35","guid":{"rendered":"https:\/\/fwq.ai\/blog\/22790\/"},"modified":"2024-11-21T13:19:35","modified_gmt":"2024-11-21T05:19:35","slug":"laravel-db%e6%9f%a5%e8%af%a2%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/22790\/","title":{"rendered":"laravel db\u67e5\u8be2\u8bed\u53e5"},"content":{"rendered":"

laravel\u662f\u4e00\u6b3e\u529f\u80fd\u5f3a\u5927\u7684php\u6846\u67b6\uff0c\u5728\u5f00\u53d1web\u5e94\u7528\u65f6\uff0claravel\u63d0\u4f9b\u4e86\u8bb8\u591a\u4fbf\u6377\u7684\u529f\u80fd\uff0c\u5176\u4e2d\u6570\u636e\u5e93\u67e5\u8be2\u529f\u80fd\u662f\u5f00\u53d1\u8005\u5fc5\u987b\u638c\u63e1\u7684\u3002<\/p>\n

\u672c\u6587\u5c06\u4ecb\u7ecdLaravel\u4e2d\u5e38\u7528\u7684\u6570\u636e\u5e93\u67e5\u8be2\u8bed\u53e5\uff0c\u5305\u62ec\u57fa\u672c\u67e5\u8be2\u3001\u805a\u5408\u67e5\u8be2\u3001\u6761\u4ef6\u67e5\u8be2\u548c\u5173\u8054\u67e5\u8be2\u7b49\uff0c\u4ee5\u5e2e\u52a9\u5f00\u53d1\u8005\u66f4\u597d\u5730\u4f7f\u7528Laravel\u6846\u67b6\u8fdb\u884c\u6570\u636e\u5e93\u64cd\u4f5c\u3002<\/p>\n

    \n
  1. \u57fa\u672c\u67e5\u8be2<\/li>\n<\/ol>\n

    Laravel\u4e2d\u6700\u57fa\u672c\u7684\u67e5\u8be2\u8bed\u53e5\u662fselect\u8bed\u53e5\uff0c\u7528\u4e8e\u67e5\u8be2\u6570\u636e\u8868\u4e2d\u7684\u6570\u636e\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u67e5\u8be2\u793a\u4f8b\uff1a<\/p>\n

    $users = DB::table('users')-&gt;get();<\/pre>\n
      \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
    \u6b64\u4ee3\u7801\u4eceusers\u8868\u4e2d\u83b7\u53d6\u6240\u6709\u6570\u636e\uff0c\u5e76\u5c06\u7ed3\u679c\u5b58\u50a8\u5728$users\u53d8\u91cf\u4e2d\u3002<\/p>\n
    \u9664\u6b64\u4e4b\u5916\uff0cLaravel\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u7b80\u5355\u7684\u67e5\u8be2\u8f85\u52a9\u51fd\u6570\uff0c\u4f8b\u5982\uff0c\u83b7\u53d6\u8868\u4e2d\u7684\u7b2c\u4e00\u6761\u8bb0\u5f55\uff1a<\/p>\n
    $user = DB::table('users')-&gt;first();<\/pre>\n
      \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
    \u67e5\u8be2\u7279\u5b9a\u7684\u6570\u636e\u5217\uff1a<\/p>\n
    $users = DB::table('users')-&gt;select('name', 'email')-&gt;get();<\/pre>\n
      \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
    \u4ece\u5b50\u53e5\u4e2d\u8fc7\u6ee4\u6570\u636e\uff1a<\/p>\n
    $users = DB::table('users')-&gt;where('name', '=', 'John')-&gt;get();<\/pre>\n
      \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \n
    1. \u805a\u5408\u67e5\u8be2<\/li>\n<\/ol>\n
      \u5728Laravel\u4e2d\uff0c\u805a\u5408\u51fd\u6570\u7528\u4e8e\u67e5\u8be2\u548c\u8ba1\u7b97\u6570\u636e\u8868\u7684\u805a\u5408\u503c\uff0c\u5982\u8ba1\u7b97\u6700\u5927\u503c\u3001\u6700\u5c0f\u503c\u3001\u5e73\u5747\u503c\u3001\u603b\u548c\u7b49\u3002\u4e0b\u9762\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u805a\u5408\u51fd\u6570\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n
      \u8ba1\u7b97\u603b\u8bb0\u5f55\u6570\uff1a<\/p>\n
      $count = DB::table('users')-&gt;count();<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \u8ba1\u7b97\u6700\u5927\u503c\uff1a<\/p>\n
      $max = DB::table('users')-&gt;max('age');<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \u8ba1\u7b97\u5e73\u5747\u503c\uff1a<\/p>\n
      $avg = DB::table('users')-&gt;avg('age');<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \u8ba1\u7b97\u603b\u548c\uff1a<\/p>\n
      $total = DB::table('users')-&gt;sum('age');<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
        \n
      1. \u6761\u4ef6\u67e5\u8be2<\/li>\n<\/ol>\n
        Laravel\u4e2d\u7684\u6761\u4ef6\u67e5\u8be2\u5305\u62ec\u4f7f\u7528where\u8bed\u53e5\u8fdb\u884c\u6761\u4ef6\u5339\u914d\uff0c\u4f7f\u7528orWhere\u8bed\u53e5\u5b9e\u73b0\u591a\u6761\u4ef6\u5339\u914d\uff0c\u4ee5\u53ca\u4f7f\u7528whereIn\u548corWhereIn\u8bed\u53e5\u5b9e\u73b0\u67e5\u8be2\u5305\u542b\u5728\u6307\u5b9a\u5217\u8868\u4e2d\u7684\u8bb0\u5f55\u3002\u4e0b\u9762\u662f\u4e00\u4e9b\u6761\u4ef6\u67e5\u8be2\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n
        \u4f7f\u7528where\u8bed\u53e5\u5b9e\u73b0\u6761\u4ef6\u5339\u914d\uff1a<\/p>\n
        $users = DB::table('users')\n            -&gt;where('name', '=', 'John')\n            -&gt;where('age', '&gt;', 25)\n            -&gt;get();<\/pre>\n
          \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
        \u4f7f\u7528orWhere\u8bed\u53e5\u5b9e\u73b0\u591a\u6761\u4ef6\u5339\u914d\uff1a<\/p>\n
        $users = DB::table('users')\n            -&gt;where('name', '=', 'John')\n            -&gt;orWhere('age', '&gt;', 25)\n            -&gt;get();<\/pre>\n
          \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
        \u4f7f\u7528whereIn\u548corWhereIn\u8bed\u53e5\u5b9e\u73b0\u67e5\u8be2\u5305\u542b\u5728\u6307\u5b9a\u5217\u8868\u4e2d\u7684\u8bb0\u5f55\uff1a<\/p>\n
        $users = DB::table('users')\n            -&gt;whereIn('id', [1, 2, 3])\n            -&gt;get();\n\n$users = DB::table('users')\n            -&gt;orWhereIn('id', [1, 2, 3])\n            -&gt;get();<\/pre>\n
          \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
          \n
        1. \u5173\u8054\u67e5\u8be2<\/li>\n<\/ol>\n
          \u5728Laravel\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7join\u8bed\u53e5\u5b9e\u73b0\u8868\u4e4b\u95f4\u7684\u5173\u8054\u67e5\u8be2\u3002\u5173\u8054\u67e5\u8be2\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u4e0d\u540c\u7684\u65b9\u5f0f\uff0c\u4f8b\u5982\uff0c\u4f7f\u7528innerJoin\u3001leftJoin\u548crightJoin\u7b49\u3002\u4e0b\u9762\u662f\u4e00\u4e9b\u5173\u8054\u67e5\u8be2\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n
          \u4f7f\u7528innerJoin\u8bed\u53e5\u5b9e\u73b0\u5185\u8fde\u63a5\uff1a<\/p>\n
          $users = DB::table('users')\n            -&gt;join('orders', 'users.id', '=', 'orders.user_id')\n            -&gt;select('users.name', 'orders.price')\n            -&gt;get();<\/pre>\n
            \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
          \u4f7f\u7528leftJoin\u8bed\u53e5\u5b9e\u73b0\u5de6\u8fde\u63a5\uff1a<\/p>\n
          $users = DB::table('users')\n            -&gt;leftJoin('orders', 'users.id', '=', 'orders.user_id')\n            -&gt;select('users.name', 'orders.price')\n            -&gt;get();<\/pre>\n
            \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
          \u4f7f\u7528rightJoin\u8bed\u53e5\u5b9e\u73b0\u53f3\u8fde\u63a5\uff1a<\/p>\n
          $users = DB::table('users')\n            -&gt;rightJoin('orders', 'users.id', '=', 'orders.user_id')\n            -&gt;select('users.name', 'orders.price')\n            -&gt;get();<\/pre>\n
            \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
          \u4ee5\u4e0a\u662fLaravel\u4e2d\u5e38\u7528\u7684\u6570\u636e\u5e93\u67e5\u8be2\u8bed\u53e5\u4ecb\u7ecd\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u7075\u6d3b\u8fd0\u7528\uff0c\u5feb\u901f\u9ad8\u6548\u5730\u8fdb\u884c\u6570\u636e\u5e93\u67e5\u8be2\u64cd\u4f5c\u3002\u9664\u6b64\u4e4b\u5916\uff0cLaravel\u8fd8\u63d0\u4f9b\u4e86\u5176\u4ed6\u5f3a\u5927\u7684\u6570\u636e\u5e93\u64cd\u4f5c\u529f\u80fd\uff0c\u5982\u4e8b\u52a1\u5904\u7406\u3001\u5206\u9875\u548c\u6570\u636e\u5e93\u8fc1\u79fb\u7b49\uff0c\u8fd9\u4e9b\u529f\u80fd\u53ef\u4ee5\u66f4\u597d\u5730\u5e2e\u52a9\u5f00\u53d1\u8005\u7ba1\u7406\u548c\u7ef4\u62a4\u6570\u636e\u5e93\uff0c\u63d0\u5347\u5f00\u53d1\u6548\u7387\u3002<\/p>\n
          \u4ee5\u4e0a\u5c31\u662flaravel db\u67e5\u8be2\u8bed\u53e5\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":"
          laravel\u662f\u4e00\u6b3e\u529f\u80fd\u5f3a\u5927\u7684php\u6846\u67b6\uff0c\u5728\u5f00\u53d1web\u5e94\u7528\u65f6\uff0claravel\u63d0\u4f9b\u4e86\u8bb8\u591a\u4fbf\u6377\u7684\u529f\u80fd\uff0c\u5176\u4e2d\u6570\u636e\u5e93\u67e5\u8be2\u529f\u80fd\u662f\u5f00\u53d1\u8005\u5fc5\u987b\u638c\u63e1\u7684\u3002 \u672c\u6587\u5c06\u4ecb\u7ecdLaravel\u4e2d\u5e38\u7528\u7684\u6570\u636e\u5e93\u67e5\u8be2\u8bed\u53e5\uff0c\u5305\u62ec\u57fa\u672c\u67e5\u8be2\u3001\u805a\u5408\u67e5\u8be2\u3001\u6761\u4ef6\u67e5\u8be2\u548c\u5173\u8054\u67e5\u8be2\u7b49\uff0c\u4ee5\u5e2e\u52a9\u5f00\u53d1\u8005\u66f4\u597d\u5730\u4f7f\u7528Laravel\u6846\u67b6\u8fdb\u884c\u6570\u636e\u5e93\u64cd\u4f5c\u3002 \u57fa\u672c\u67e5\u8be2 Laravel\u4e2d\u6700\u57fa\u672c\u7684\u67e5\u8be2\u8bed\u53e5\u662fselect\u8bed\u53e5\uff0c\u7528\u4e8e\u67e5\u8be2\u6570\u636e\u8868\u4e2d\u7684\u6570\u636e\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u67e5\u8be2\u793a\u4f8b\uff1a $users = DB::table(‘users’)-&gt;get(); \u767b\u5f55\u540e\u590d\u5236 \u6b64\u4ee3\u7801\u4eceusers\u8868\u4e2d\u83b7\u53d6\u6240\u6709\u6570\u636e\uff0c\u5e76\u5c06\u7ed3\u679c\u5b58\u50a8\u5728$users\u53d8\u91cf\u4e2d\u3002 \u9664\u6b64\u4e4b\u5916\uff0cLaravel\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u7b80\u5355\u7684\u67e5\u8be2\u8f85\u52a9\u51fd\u6570\uff0c\u4f8b\u5982\uff0c\u83b7\u53d6\u8868\u4e2d\u7684\u7b2c\u4e00\u6761\u8bb0\u5f55\uff1a $user = DB::table(‘users’)-&gt;first(); \u767b\u5f55\u540e\u590d\u5236 \u67e5\u8be2\u7279\u5b9a\u7684\u6570\u636e\u5217\uff1a $users = DB::table(‘users’)-&gt;select(‘name’, ’email’)-&gt;get(); \u767b\u5f55\u540e\u590d\u5236 \u4ece\u5b50\u53e5\u4e2d\u8fc7\u6ee4\u6570\u636e\uff1a $users = DB::table(‘users’)-&gt;where(‘name’, ‘=’, ‘John’)-&gt;get(); \u767b\u5f55\u540e\u590d\u5236 \u805a\u5408\u67e5\u8be2 \u5728Laravel\u4e2d\uff0c\u805a\u5408\u51fd\u6570\u7528\u4e8e\u67e5\u8be2\u548c\u8ba1\u7b97\u6570\u636e\u8868\u7684\u805a\u5408\u503c\uff0c\u5982\u8ba1\u7b97\u6700\u5927\u503c\u3001\u6700\u5c0f\u503c\u3001\u5e73\u5747\u503c\u3001\u603b\u548c\u7b49\u3002\u4e0b\u9762\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u805a\u5408\u51fd\u6570\u7684\u4ee3\u7801\u793a\u4f8b\uff1a \u8ba1\u7b97\u603b\u8bb0\u5f55\u6570\uff1a $count = DB::table(‘users’)-&gt;count(); \u767b\u5f55\u540e\u590d\u5236 \u8ba1\u7b97\u6700\u5927\u503c\uff1a $max = DB::table(‘users’)-&gt;max(‘age’); \u767b\u5f55\u540e\u590d\u5236 \u8ba1\u7b97\u5e73\u5747\u503c\uff1a $avg = DB::table(‘users’)-&gt;avg(‘age’); \u767b\u5f55\u540e\u590d\u5236 \u8ba1\u7b97\u603b\u548c\uff1a $total = DB::table(‘users’)-&gt;sum(‘age’); \u767b\u5f55\u540e\u590d\u5236 \u6761\u4ef6\u67e5\u8be2 Laravel\u4e2d\u7684\u6761\u4ef6\u67e5\u8be2\u5305\u62ec\u4f7f\u7528where\u8bed\u53e5\u8fdb\u884c\u6761\u4ef6\u5339\u914d\uff0c\u4f7f\u7528orWhere\u8bed\u53e5\u5b9e\u73b0\u591a\u6761\u4ef6\u5339\u914d\uff0c\u4ee5\u53ca\u4f7f\u7528whereIn\u548corWhereIn\u8bed\u53e5\u5b9e\u73b0\u67e5\u8be2\u5305\u542b\u5728\u6307\u5b9a\u5217\u8868\u4e2d\u7684\u8bb0\u5f55\u3002\u4e0b\u9762\u662f\u4e00\u4e9b\u6761\u4ef6\u67e5\u8be2\u7684\u4ee3\u7801\u793a\u4f8b\uff1a \u4f7f\u7528where\u8bed\u53e5\u5b9e\u73b0\u6761\u4ef6\u5339\u914d\uff1a $users = DB::table(‘users’) […]<\/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-22790","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/22790","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=22790"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/22790\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=22790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=22790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=22790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}