laravel执行原生sql

use Illuminate\Support\Facades\DB;

$sql = "SELECT id FROM cz_magazine_init WHERE id >= (SELECT floor( RAND() * ((SELECT MAX(id) FROM cz_magazine_init)-(SELECT MIN(id) FROM cz_magazine_init)) + (SELECT MIN(id) FROM cz_magazine_init))) LIMIT 1";

$res = DB::connection('mysql_dev')->select($sql);// 需要设置连接参数

var_dump($res);

输出格式

array(1) {
  [0]=>
  object(stdClass)#350 (1) {
    ["id"]=>
    int(506)
  }
}

可见返回的是数组，然后数组里面的元素的标准的类。后面就可以随意怎么处理了。