laravel update query builder

 DB::table('user')->where('email', $userEmail)->update(array('member_type' => $plan));  

$update = \DB::table('student') ->where('id', $data['id']) ->limit(1) ->update( [ 'name' => $data['name'], 'address' => $data['address'], 'email' => $data['email'], 'contactno' => $data['contactno'] ]);

$house=house::where('id',1)
    ->orderBy('id')
    ->take(1)
    ->get();
dd($house);