Need help with database querys

[eluser]Twisted1919[/eluser]

Code:

//model function:
function get_entry($entry_id){
$sql='SELECT b.*,u.* FROM blogs b INNER JOIN users u ON u.user_id=b.user_id
WHERE b.entry_id=?';
$query=$this->db->query($sql,array($entry_id));
return $query->num_rows() > 0 ? $query->row() : NULL ;
}


//controller
if($entry = $this->model_name->get_entry(123))
{
   echo $entry->username;
}