DbConnection::queryScalar

public function queryScalar($sql, array $arBinds = null)
{
	$trackerQuery = null;
	if ($this->trackSql)
		$trackerQuery = $this->sqlTracker->getNewTrackerQuery();

	$result = $this->queryInternal($sql, $arBinds, 0, 1, $trackerQuery);
	$dbResult = $this->createDbResult($result, $trackerQuery);

	$return = null;
	if ($ar = $dbResult->fetch())
		$return = array_shift($ar);

	return $return;
}