show data from 2 tables

I am attempting to pull data from 2 tables. My SELECT statement seems ok. But the next line: while ... etc. is giving me an error of "Supplied argument is not a valid MySQL result resource.". But this is the way I usually show my data and it works fine when only 1 table is involved. Is there a different way of showing your data when pulling data from more than one table? $result = @mysql_query('SELECT orders.orderid, orders.amount, orders.date from customers, orders WHERE customers.name = "Don Hansen" and customers.customerid = orders.customerid'); while ( $row = mysql_fetch_array($result) ) { $zorderid = $row['orders.orderid']; $zamt = $row['orders.amount']; echo (str_pad($zorderid,4,' ') . str_pad($zamt,6, ' ') . '<br>'); } Thanks, Doug