Как сделать сортировку по нескольким параметрам в обяъвлении - AdsManager

	$database->setQuery("SELECT a.*, p.name as parent, p.id as parentid, c.name as cat, c.id as catid, $name as user ".
						"FROM #__adsmanager_ads as a ".
						"LEFT JOIN #__users as u ON a.userid = u.id ".
						"LEFT JOIN #__adsmanager_categories as c ON a.category = c.id ".
						"LEFT JOIN #__adsmanager_categories as p ON c.parent = p.id ".
						"WHERE $search and c.published = 1 ".
						"ORDER BY $order_text ",
						$limitstart,$limit);