Hi Bert,

>return a selection of rows from table A based on wether the value of the
>primary key of a row isn't found in a certain column in table B. (or is
>found)? if yes : how?

this sounds like a very clear and simple question, so I must have
misunderstood something ;o}

SELECT * (or better, a list of fields)
FROM A
WHERE NOT EXISTS (SELECT 1 FROM B WHERE B.A_PK = A.PK)

Was this what you were looking for?

Set