Search inherited tables

Hello everyone,

I have he following situation:

I have a 'base' table called Problem and 5 other tables that inherit 
Problem: MultipleChoiceProblem, TrueFalseProblem, EssayProblem, 
NumericProblem and MatchProblem

I want to do the following query:

SELECT * FROM Problem;

But Problem is empty, since I fill only the derived tables. How can I make 
this query?

Thanks for your help in advance!

Regards,
Stephan
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Stephan Richter
CBU - Physics and Chemistry Student
Web2k - Web Design/Development & Technical Project Management