[Zope] ZODB/RDBMS newbie question

[Jeremy Cowgar]

Greetings.

I am curious when I should use ZODB or an RDBMS. For instance, I am writting a 
little web app to maintain the Sunday school department at my church. I am 
porting it from a Tcl/Tk app for practice into Zope.

I track Households, People and Classes. Households has many people, and a 
Class links to the person table twice, once for the teacher, and another time 
for the substitute.

I am curious if I should be researching using ZODB for this or use an RDBMS?

Thanks,

Jeremy Cowgar