using database library calls within a helper

[eluser]AF[/eluser]
Could you give me a little more detail? Here is the code:

function datediff($sdate, $anchor) {
$query="SELECT DATEDIFF('$sdate','$anchor')";
$query =$this->db->query($query);
$row=$query->result_array();


return($row);
}

So, maybe this is a basic question, but what is the & in your case?

And, thank you too.