/**
* Returns a partial SQL string to search for all records between two dates.
*
* @param int|string|DateTime $begin UNIX timestamp, strtotime() valid string or DateTime object
* @param int|string|DateTime $end UNIX timestamp, strtotime() valid string or DateTime object
* @param string $fieldName Name of database field to compare with
* @param string|DateTimeZone $timezone User's timezone string or DateTimeZone object
*
* @return string Partial SQL string.
* @see CakeTime::daysAsSql()
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public function daysAsSql($begin, $end, $fieldName, $timezone = NULL)
{
return $this->_engine->daysAsSql($begin, $end, $fieldName, $timezone);
}