[Zope] newbie question

Hi all - hope you can help. I'm created several SQL Methods, the first of which returned a list of customers based on an string input value, and the second Method returns a list of transactions for those customers based on customer number. What I'm trying to do is once I done the first query and have a customer list on my screen I want the each customer number to be a link which once clicked on will run the second query showing all the transactions for that specific customer. Is this possible? TIA Jenny