db create command by QueryBuilder

TestDemoController.php

		$rows = Yii::app()->db->createCommand()
						->from('tbl_Topic')
						->where('status_code > 0')
						->order('id desc')
						->queryAll();
		echo '<ul>';
		foreach ($rows as $row ) {
			echo '<li>'.$row['id'].'</li>';
		}
		echo '</ul>';