Answers for "subtraction in laravel join query"

laravel join

Inner Join 	: ->join('contacts', 'users.id', '=', 'contacts.user_id')
Left Join 	: ->leftJoin('posts', 'users.id', '=', 'posts.user_id')
Right Join 	: ->rightJoin('posts', 'users.id', '=', 'posts.user_id')
Cross Join 	: ->crossJoin('colors')

Advance Queries : 
----------------- 
 		->join('contacts', function ($join) {
            $join->on('users.id', '=', 'contacts.user_id')
                 ->where('contacts.user_id', '>', 5);
        })

Laravel - Query Builder Left join

$result = DB::table('pos_cash_register_open')
            ->select('pos_cash_register_open.outlet_id','pos_outlets.*')
            ->leftjoin('pos_outlets', 'pos_cash_register_open.outlet_id', '=', 'pos_outlets.id')
            ->groupBy('pos_cash_register_open.outlet_id')
            ->get();