Joomla Database - How to use LIMIT in getQuery?

I want to build the below query using joomla inbuilt database class.

SELECT * 
FROM table_name
ORDER BY id DESC
LIMIT 1

This is the query I have built up to now.

$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();

I don't know how to add the limit(LIMIT 1) to the query. Can someone please tell me how to do it? Thanks

Solution

Older than Joomla 3.0

$db = JFactory::getDBO();    

$query  = $db->getQuery(true);
$query->select('*')
 ->from($db->nameQuote('#__table_name'))
 ->order($db->nameQuote('id').' desc');     
$db->setQuery($query,0,1);  

$rows = $db->loadObjectList();

$db->setQuery function takes 3 parameters. The first one being the query, then the start, then the limit. We can limit records as shown above.

Newer than Joomla 3.0

setLimit(integer $limit, integer $offset)

If you want just one row

$query->setLimit(1);