Functions
function delete($table, $conditions='', $params=array())
The delete() method builds and executes a DELETE SQL statement.’$table’ is a table name of delete from.’$conditions’ and ‘$params’ is like where condition of delete statement
Sample
<?php $user=Yii::app()->db->createCommand() ->delete('tbl_user', 'user_id=:id', array(':id'=>2)); ?>
OUTPUT SQL
DELETE FROM `tbl_user` WHERE user_id=:id