Yii: CDbCriteria with Yii::app()->db->createCommand()

gistfile1.php

<?php
/**
 * To use CDbCriteria with createCommand follow this tip:
 */
$criteria = new CDbCriteria();
$criteria->compare('id', $this->id);
$criteria->addCondition('user.id in (select userid from user_groups where group_type = 1');

$command = Yii::app()->db->createCommand();
$command->from('vci_veiculo');
$command->andWhere($criteria->condition, $criteria->params);

$results = $command->queryAll();