bwh2: Please Help

I followed your tut. I now have this code:
*delete connection/db vars


<?php
//Connecting To Server & Database
$host     = "";
$username = "";
$password = "";
$database = "";

$connect = mysql_connect($host, $username, $password);
$select_database = mysql_select_db($database, $connect);

$getdata = mysql_query("SELECT tbl_categories.category_name
FROM tbl_works,
tbl_works_categories,
tbl_categories
WHERE tbl_works.work_id = 1
AND tbl_works.work_id = tbl_works_categories.work_id
AND tbl_works_categories.category_id = tbl_categories.category_id");

while ($row = mysql_fetch_array($getdata)) {


}

?>

I am wanting to know how will I be able to display the cat name, I dont kn ow what to put int the $row[’’]