>As I know there is SELECT's filter using EXIST, which format is:
>SELECT <...> WHERE EXIST (subquery)
>
>How to use it? I have found very little information about it
>in VFP Help. I have tried it with 2 tables with diferent fields,
>but didn't work. :(

SELECT SomeField FROM TableA WHERE ExtKey EXIST IN
(SELECT Key FROM TableB)