[Zope] Web reporting

I have recently been generating web reports from relational data in our ERP system and would like to process the results a little more than what I can accomplish with SQL alone. Are there any reporting packages available for Zope that are similar in spirit to Crystal Reports or anything like that? I'd like to have a few basic functions like sum and average, etc. I could do this in python, but I would think this kind of thing should be a Product that everyone can use. Does such a thing already exist somewhere?