{"id":22389,"date":"2024-11-21T10:04:32","date_gmt":"2024-11-21T02:04:32","guid":{"rendered":"https:\/\/fwq.ai\/blog\/22389\/"},"modified":"2024-11-21T10:04:32","modified_gmt":"2024-11-21T02:04:32","slug":"laravel%e6%80%8e%e4%b9%88%e6%9e%84%e5%bb%ba%e5%a4%8d%e6%9d%82%e6%9f%a5%e8%af%a2%e6%9d%a1%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/22389\/","title":{"rendered":"laravel\u600e\u4e48\u6784\u5efa\u590d\u6742\u67e5\u8be2\u6761\u4ef6"},"content":{"rendered":"

\u5728laravel\u4e2d\uff0c\u6784\u5efa\u590d\u6742\u67e5\u8be2\u6761\u4ef6\u662f\u5f88\u5e38\u89c1\u7684\u9700\u6c42\u3002\u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u67e5\u8be2\u540c\u65f6\u6ee1\u8db3\u591a\u4e2a\u6761\u4ef6\u7684\u6570\u636e\uff0c\u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u67e5\u8be2\u67d0\u4e2a\u5b57\u6bb5\u6700\u5927\u503c\u6216\u6700\u5c0f\u503c\uff0c\u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u67e5\u8be2\u67d0\u4e9b\u6761\u4ef6\u4e0d\u6ee1\u8db3\u7684\u6570\u636e\u7b49\u7b49\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528laravel\u7684\u67e5\u8be2\u6784\u9020\u5668\u6765\u5b9e\u73b0\u8fd9\u4e9b\u9700\u6c42\u3002<\/p>\n

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

    \u9996\u5148\uff0c\u6211\u4eec\u6765\u770b\u4e00\u4e0bLaravel\u7684\u57fa\u672c\u67e5\u8be2\u8bed\u6cd5\u3002\u5728Laravel\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528DB\u95e8\u9762\u7684table()\u65b9\u6cd5\u6765\u6307\u5b9a\u6211\u4eec\u8981\u67e5\u8be2\u7684\u8868\uff0c\u7136\u540e\u4f7f\u7528select()\u65b9\u6cd5\u6307\u5b9a\u6211\u4eec\u9700\u8981\u67e5\u8be2\u7684\u5b57\u6bb5\u3002<\/p>\n

    \u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u6240\u6709\u7684\u8bb0\u5f55\uff0c\u5e76\u8fd4\u56de\u5176id\u548cname\u5b57\u6bb5\uff1a<\/p>\n

    DB::table('users')->select('id', 'name')->get();<\/pre>\n
      \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
    \u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528where()\u65b9\u6cd5\u6765\u6307\u5b9a\u67e5\u8be2\u6761\u4ef6\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u5e74\u9f84\u5927\u4e8e18\u7684\u8bb0\u5f55\uff1a<\/p>\n
    DB::table('users')->where('age', '>', 18)->get();<\/pre>\n
      \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \n
    1. \u67e5\u8be2\u6761\u4ef6\u7ec4\u5408<\/li>\n<\/ol>\n
      \u5f53\u6211\u4eec\u9700\u8981\u540c\u65f6\u6ee1\u8db3\u591a\u4e2a\u6761\u4ef6\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528where()\u65b9\u6cd5\u6765\u7ec4\u5408\u67e5\u8be2\u6761\u4ef6\u3002<\/p>\n
      \u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u540c\u65f6\u6ee1\u8db3\u5e74\u9f84\u5927\u4e8e18\u4e14\u6027\u522b\u4e3a\u7537\u7684\u8bb0\u5f55\uff1a<\/p>\n
      DB::table('users')->where('age', '>', 18)->where('gender', 'male')->get();<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528orWhere()\u65b9\u6cd5\u6765\u6307\u5b9a\u5176\u4e2d\u4e00\u4e2a\u6761\u4ef6\u6ee1\u8db3\u5373\u53ef\u3002<\/p>\n
      \u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u5e74\u9f84\u5927\u4e8e18\u6216\u6027\u522b\u4e3a\u7537\u7684\u8bb0\u5f55\uff1a<\/p>\n
      DB::table('users')->where('age', '>', 18)->orWhere('gender', 'male')->get();<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \u5982\u679c\u6211\u4eec\u9700\u8981\u591a\u91cd\u6761\u4ef6\u7684\u7ec4\u5408\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u95ed\u5305\u6765\u5b9e\u73b0\u3002<\/p>\n
      \u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u540c\u65f6\u6ee1\u8db3\u5e74\u9f84\u5927\u4e8e18\u4e14\u6027\u522b\u4e3a\u7537\u6216\u8005\u5e74\u9f84\u7b49\u4e8e18\u4e14\u6027\u522b\u4e3a\u5973\u7684\u8bb0\u5f55\uff1a<\/p>\n
      DB::table('users')->where(function($query) {\n    $query->where('age', '>', 18)\n          ->where('gender', 'male');\n})->orWhere(function($query) {\n    $query->where('age', '=', 18)\n          ->where('gender', 'female');\n})->get();<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
        \n
      1. \u6a21\u7cca\u67e5\u8be2<\/li>\n<\/ol>\n
        \u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u6839\u636e\u67d0\u4e2a\u5b57\u6bb5\u7684\u4e00\u90e8\u5206\u6765\u67e5\u8be2\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528like()\u65b9\u6cd5\u548c\u901a\u914d\u7b26\u6765\u5b9e\u73b0\u6a21\u7cca\u67e5\u8be2\u3002\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u540d\u5b57\u4ee5\u201cJ\u201d\u5f00\u5934\u7684\u8bb0\u5f55\uff1a<\/p>\n
        DB::table('users')->where('name', 'like', 'J%')->get();<\/pre>\n
          \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
          \n
        1. \u6700\u5927\u503c\u548c\u6700\u5c0f\u503c\u67e5\u8be2<\/li>\n<\/ol>\n
          \u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u67e5\u8be2\u67d0\u4e2a\u5b57\u6bb5\u7684\u6700\u5927\u503c\u6216\u6700\u5c0f\u503c\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528max()\u548cmin()\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2dage\u5b57\u6bb5\u7684\u6700\u5927\u503c\u548c\u6700\u5c0f\u503c\uff1a<\/p>\n
          $maxAge = DB::table('users')->max('age');\n$minAge = DB::table('users')->min('age');<\/pre>\n
            \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
            \n
          1. \u4e0d\u7b49\u4e8e\u67e5\u8be2<\/li>\n<\/ol>\n
            \u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u67e5\u8be2\u67d0\u4e2a\u5b57\u6bb5\u4e0d\u7b49\u4e8e\u67d0\u4e2a\u503c\u7684\u8bb0\u5f55\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528where()\u65b9\u6cd5\u548c\u7b26\u53f7\u6765\u5b9e\u73b0\u3002\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u6027\u522b\u4e0d\u4e3a\u7537\u7684\u8bb0\u5f55\uff1a<\/p>\n
            DB::table('users')->where('gender', '<>', 'male')->get();<\/pre>\n
              \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
              \n
            1. in\u548cnot in\u67e5\u8be2<\/li>\n<\/ol>\n
              \u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u67e5\u8be2\u67d0\u4e2a\u5b57\u6bb5\u5728\u67d0\u4e2a\u503c\u5217\u8868\u4e2d\u7684\u8bb0\u5f55\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528whereIn()\u65b9\u6cd5\u548c\u503c\u5217\u8868\u6765\u5b9e\u73b0\u3002\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2dage\u5b57\u6bb5\u7684\u503c\u4e3a18\u300119\u621620\u7684\u8bb0\u5f55\uff1a<\/p>\n
              DB::table('users')->whereIn('age', [18, 19, 20])->get();<\/pre>\n
                \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
              \u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528whereNotIn()\u65b9\u6cd5\u6765\u67e5\u8be2\u4e0d\u5728\u503c\u5217\u8868\u4e2d\u7684\u8bb0\u5f55\u3002<\/p>\n
                \n
              1. exists\u548cnot exists\u67e5\u8be2<\/li>\n<\/ol>\n
                \u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u67e5\u8be2\u67d0\u4e2a\u6761\u4ef6\u5b58\u5728\u6216\u4e0d\u5b58\u5728\u7684\u8bb0\u5f55\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528whereExists()\u548cwhereNotExists()\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2orders\u8868\u4e2d\u5b58\u5728\u5bf9\u5e94\u7528\u6237\u7684\u8bb0\u5f55\uff1a<\/p>\n
                DB::table('orders')\n    ->whereExists(function ($query) {\n        $query->select(DB::raw(1))\n              ->from('users')\n              ->whereRaw('users.id = orders.user_id');\n    })\n    ->get();<\/pre>\n
                  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
                \u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528whereNotExists()\u65b9\u6cd5\u6765\u67e5\u8be2\u4e0d\u5b58\u5728\u5bf9\u5e94\u7528\u6237\u7684\u8bb0\u5f55\u3002<\/p>\n
                \u5230\u6b64\uff0c\u6211\u4eec\u4ecb\u7ecd\u4e86Laravel\u6784\u5efa\u590d\u6742\u67e5\u8be2\u6761\u4ef6\u7684\u57fa\u672c\u65b9\u6cd5\u3002Laravel\u7684\u67e5\u8be2\u6784\u9020\u5668\u8ba9\u6211\u4eec\u5728\u7f16\u5199\u67e5\u8be2\u8bed\u53e5\u65f6\u66f4\u7b80\u5355\u3001\u66f4\u76f4\u89c2\uff0c\u800c\u4e0d\u5fc5\u8fc7\u591a\u8003\u8651SQL\u8bed\u6cd5\u7684\u7ec6\u8282\u3002\u5f53\u7136\uff0c\u4ee5\u4e0a\u53ea\u662f\u67e5\u8be2\u8bed\u53e5\u7684\u51b0\u5c71\u4e00\u89d2\uff0cLaravel\u7684\u67e5\u8be2\u6784\u9020\u5668\u8fd8\u6709\u5f88\u591a\u9ad8\u7ea7\u7528\u6cd5\u7b49\u5f85\u6211\u4eec\u53bb\u53d1\u6398\u3002<\/p>\n
                \u4ee5\u4e0a\u5c31\u662flaravel\u600e\u4e48\u6784\u5efa\u590d\u6742\u67e5\u8be2\u6761\u4ef6\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":"
                \u5728laravel\u4e2d\uff0c\u6784\u5efa\u590d\u6742\u67e5\u8be2\u6761\u4ef6\u662f\u5f88\u5e38\u89c1\u7684\u9700\u6c42\u3002\u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u67e5\u8be2\u540c\u65f6\u6ee1\u8db3\u591a\u4e2a\u6761\u4ef6\u7684\u6570\u636e\uff0c\u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u67e5\u8be2\u67d0\u4e2a\u5b57\u6bb5\u6700\u5927\u503c\u6216\u6700\u5c0f\u503c\uff0c\u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u67e5\u8be2\u67d0\u4e9b\u6761\u4ef6\u4e0d\u6ee1\u8db3\u7684\u6570\u636e\u7b49\u7b49\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528laravel\u7684\u67e5\u8be2\u6784\u9020\u5668\u6765\u5b9e\u73b0\u8fd9\u4e9b\u9700\u6c42\u3002 \u57fa\u672c\u67e5\u8be2 \u9996\u5148\uff0c\u6211\u4eec\u6765\u770b\u4e00\u4e0bLaravel\u7684\u57fa\u672c\u67e5\u8be2\u8bed\u6cd5\u3002\u5728Laravel\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528DB\u95e8\u9762\u7684table()\u65b9\u6cd5\u6765\u6307\u5b9a\u6211\u4eec\u8981\u67e5\u8be2\u7684\u8868\uff0c\u7136\u540e\u4f7f\u7528select()\u65b9\u6cd5\u6307\u5b9a\u6211\u4eec\u9700\u8981\u67e5\u8be2\u7684\u5b57\u6bb5\u3002 \u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u6240\u6709\u7684\u8bb0\u5f55\uff0c\u5e76\u8fd4\u56de\u5176id\u548cname\u5b57\u6bb5\uff1a DB::table(‘users’)->select(‘id’, ‘name’)->get(); \u767b\u5f55\u540e\u590d\u5236 \u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528where()\u65b9\u6cd5\u6765\u6307\u5b9a\u67e5\u8be2\u6761\u4ef6\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u5e74\u9f84\u5927\u4e8e18\u7684\u8bb0\u5f55\uff1a DB::table(‘users’)->where(‘age’, ‘>’, 18)->get(); \u767b\u5f55\u540e\u590d\u5236 \u67e5\u8be2\u6761\u4ef6\u7ec4\u5408 \u5f53\u6211\u4eec\u9700\u8981\u540c\u65f6\u6ee1\u8db3\u591a\u4e2a\u6761\u4ef6\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528where()\u65b9\u6cd5\u6765\u7ec4\u5408\u67e5\u8be2\u6761\u4ef6\u3002 \u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u540c\u65f6\u6ee1\u8db3\u5e74\u9f84\u5927\u4e8e18\u4e14\u6027\u522b\u4e3a\u7537\u7684\u8bb0\u5f55\uff1a DB::table(‘users’)->where(‘age’, ‘>’, 18)->where(‘gender’, ‘male’)->get(); \u767b\u5f55\u540e\u590d\u5236 \u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528orWhere()\u65b9\u6cd5\u6765\u6307\u5b9a\u5176\u4e2d\u4e00\u4e2a\u6761\u4ef6\u6ee1\u8db3\u5373\u53ef\u3002 \u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u5e74\u9f84\u5927\u4e8e18\u6216\u6027\u522b\u4e3a\u7537\u7684\u8bb0\u5f55\uff1a DB::table(‘users’)->where(‘age’, ‘>’, 18)->orWhere(‘gender’, ‘male’)->get(); \u767b\u5f55\u540e\u590d\u5236 \u5982\u679c\u6211\u4eec\u9700\u8981\u591a\u91cd\u6761\u4ef6\u7684\u7ec4\u5408\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u95ed\u5305\u6765\u5b9e\u73b0\u3002 \u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u540c\u65f6\u6ee1\u8db3\u5e74\u9f84\u5927\u4e8e18\u4e14\u6027\u522b\u4e3a\u7537\u6216\u8005\u5e74\u9f84\u7b49\u4e8e18\u4e14\u6027\u522b\u4e3a\u5973\u7684\u8bb0\u5f55\uff1a DB::table(‘users’)->where(function($query) { $query->where(‘age’, ‘>’, 18) ->where(‘gender’, ‘male’); })->orWhere(function($query) { $query->where(‘age’, ‘=’, 18) ->where(‘gender’, ‘female’); })->get(); \u767b\u5f55\u540e\u590d\u5236 \u6a21\u7cca\u67e5\u8be2 \u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u6839\u636e\u67d0\u4e2a\u5b57\u6bb5\u7684\u4e00\u90e8\u5206\u6765\u67e5\u8be2\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528like()\u65b9\u6cd5\u548c\u901a\u914d\u7b26\u6765\u5b9e\u73b0\u6a21\u7cca\u67e5\u8be2\u3002\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2d\u540d\u5b57\u4ee5\u201cJ\u201d\u5f00\u5934\u7684\u8bb0\u5f55\uff1a DB::table(‘users’)->where(‘name’, ‘like’, ‘J%’)->get(); \u767b\u5f55\u540e\u590d\u5236 \u6700\u5927\u503c\u548c\u6700\u5c0f\u503c\u67e5\u8be2 \u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u67e5\u8be2\u67d0\u4e2a\u5b57\u6bb5\u7684\u6700\u5927\u503c\u6216\u6700\u5c0f\u503c\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528max()\u548cmin()\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002\u4e0b\u9762\u4ee3\u7801\u4f1a\u67e5\u8be2users\u8868\u4e2dage\u5b57\u6bb5\u7684\u6700\u5927\u503c\u548c\u6700\u5c0f\u503c\uff1a $maxAge = […]<\/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-22389","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/22389","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=22389"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/22389\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=22389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=22389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=22389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}