DB::table('my_table')
->where('rowID', 1)
->update([
'column1' => DB::raw('column1 + 2'),
'column2' => DB::raw('column2 + 10'),
'column3' => DB::raw('column3 + 13'),
'column4' => DB::raw('column4 + 5'),
]);
$user = User::find($user_id);
$user->cart_count++;
$user->save();