转换MySQL查询到Laravel 4.2查询

Question

我的MySQL查询是

SELECT DISTINCT `car`.`car_maker` as `brand`, `car`.`car_model` AS `model`, `available_car`.`car_price` AS `price`, `car`.`car_production_year` AS `year`, `available_car`.`car_id` AS `car_id`,`available_car`.`id` AS `id`, `available_car`.`current_position` AS `current_position` 
    FROM `car`, `available_car`, `users` 
     WHERE `available_car`.`car_id`=`car`.`car_id` 
      AND `available_car`.`is_sold` = 'no' 
      AND `available_car`.`created_at` BETWEEN NOW() - INTERVAL 30 DAY AND NOW() 
       ORDER BY WEEK(`available_car`.`created_at`) DESC, 
         `available_car`.`car_price`DESC, 
         `users`.`last_paid_date` DESC, 
         `available_car`.`created_at` DESC 

我怎样才能把它转换使用Laravel查询生成器？

我想拥有像这种类型的查询 -

$info = DB::table('car` , `available_car`, `users') 
      ->select('car.car_maker', 'car.car_model', 'available_car.car_price', 'car.car_production_year', 'available_car.car_id','available_car.id', 'available_car.current_position') 
      ->get(); 

但它无法正常工作。

我的数据库是这样

谁能帮助我吗？

Answer 1

尝试此查询：

DB::table('car') 
->join('available_car', 'car.car_id', '=', 'availabe_car.car_id') 
->join('users', 'available_car.user_id', '=', 'users.id') 
->where('available_car.is_sold', 'no') 
->whereRaw('available_car.created_at BETWEEN NOW() - INTERVAL 30 DAY AND NOW()') 
->orderByRaw('WEEK(`available_car`.`created_at`) DESC') 
->orderBy('available_car.car_price', 'desc') 
->orderBy('users.last_paid_date', 'desc') 
->orderBy('available_car.created_at', 'desc') 
->select('car.car_maker as brand', 'car.car_model as model', 'available_car.car_price as price', 'car.car_production_year as year', 'available_car.car_id as car_id', 'available_car.id as id', 'available_car.current_position as current_position') 
->distinct()->get() 

注意，这是未经测试的代码。

Answer 2

您不能将多个表传递给select，因为它们将作为整体转义。由于使用内为@ lukasgeiter的解决方案替代连接，你可以使用DB::raw内table()：

DB::table(DB::raw('`car` , `available_car`, `users`')) 
    ->select('car.car_maker', 'car.car_model', 'available_car.car_price', 'car.car_production_year', 'available_car.car_id', 'available_car.id', 'available_car.current_position') 
    ->where('available_car.car_id', '`car`.`car_id`') 
    ->where('available_car.is_sold', 'no') 
    ->whereRaw('`available_car`.`created_at` BETWEEN NOW() - INTERVAL 30 DAY AND NOW()') 
    ->orderByRaw('WEEK(`available_car`.`created_at`) DESC') 
    ->orderBy('available_car.car_price', 'desc') 
    ->orderBy('users.last_paid_date', 'desc') 
    ->orderBy('available_car.created_at', 'desc') 
    ->distinct() 
    ->get();