intersection of two columns

Hi,
I am desparetly trying to create a query to produce a table which is the result of one origin table A minus those entries which a also in table B.
Can anyone help me?

Thx,
Horst

Create a Select statement that produces the first results.. then insert a MINUS clause and add the Select statement that produces the second set of results.

This will remove records from the 1st that would be contained also in the second.