DB::table('users')
    ->select('users.*', DB::raw('count(orders.user_id) as count_by_user_id'))
    ->join('orders' ,function($join){
        $join->on('orders.user_id', '=', 'users.id');
    })
    ->groupBy('users.id')
    ->orderBy('users.id', "DESC")
    ->get();