在 yii2 中使用限制范围?

I want to get data from db using limit 12,20 .

这是我的代码:

  $Query = new Query;
   $Query->select(['um.id as USERid', 'um.first_name', 'um.last_name',   'um.email', 'COUNT(g.id) as guestCount'])
 ->from('user_master um')
 ->join('LEFT JOIN', 'guest g', 'g.user_id = um.id')
 ->limit(12,20)
 ->groupBy('um.id')
 ->orderBy(['um.id' => SORT_DESC]);

  $command = $Query->createCommand();
  $evevtsUserDetail = $command->queryAll(); 

它不起作用.它给了我所有的行.我也试过 ->limit([12,20])，没有用.

$Query = new Query;
$Query->select(['um.id as USERid', 'um.first_name', 'um.last_name','um.email','COUNT(g.id) as guestCount'])
->from('user_master um')
->join('LEFT JOIN', 'guest g', 'g.user_id = um.id')
->limit(20)
->offset(12)
->groupBy('um.id')
->orderBy(['um.id' => SORT_DESC]);