[Zope] newbie question

[Jenny]

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