how to create sum query in laravel code example

Example 1: select sum in laravel

Sometime for such queries you need to disable the strict check
 So inside config/database.php and inside mysql, 
 Set 'strict' => false,

->select('user_id', DB::raw('SUM(points) as total_points'))

Example 2: laravel join query sum example

$users = User::select('users*', 'analytics.*', DB::raw('SUM(analytics.revenue) As revenue'))
         ->leftJoin('analytics', 'analytics.user_id', '=', 'users.id')
         ->where('analytics.date', Carbon::today()->toDateString())
         ->get();