与laravel一起

Question

如何用laravel编写此语句？

$totalSpend= DB::
select
('
  SUM(mt_subscription.total_w_tax) 
  FROM companies 
  INNER JOIN   mt_client ON companies.id = mt_client.company_id 
  INNER JOIN mt_subscription on mt_client.client_id = mt_subscription.client_id 
  WHERE mt_client.company_id = 1
');

错误：

  

SQLSTATE [42000]：语法错误或访问冲突：1064您的SQL语法有一个错误；请参见语法。检查与您的MariaDB服务器版本相对应的手册以使用正确的语法

Answer 1

请尝试一下

DB::table('companies AS cm')
        ->select(DB::raw('SUM(sub.total_w_tax)'))
        ->join('mt_client AS cl','cm.id','=','cl.company_id')
        ->join ('mt_subscription AS sub','cl.client_id','=','sub.client_id')
        ->where('cl.company_id','=','1')->get();

Answer 2

具有汇总功能时使用DB :: raw

  

$ totalSpend = DB :: select（DB :: raw（SUM（mt_subscription.total_w_tax））FROM   公司INNER JOIN mt_client ON companies.id =   mt_client.company_id INNER JOIN mt_subscription开   mt_client.client_id = mt_subscription.client_id WHERE   mt_client.company_id = 1'）;