问Joomla数据库-如何在getQuery中使用LIMIT？

EN

SELECT * 
FROM table_name
ORDER BY id DESC
LIMIT 1

$db =& JFactory::getDBO();       
$query  = $db->getQuery(true);
$query->select($db->nameQuote('*'));
$query->from($db->nameQuote(TABLE_PREFIX.'table_name'));      
$db->setQuery($query);      
$rows = $db->loadObjectList();