>Sorry, did not see this before sending my last answer.
>
>I can not cut the memofield. It holds a complete address consiting of multiple lines.
>
>Gerhard
>
>>Assuming first 250 characters is enough:
>>

>>select T.F1, T.F2, T.F3, T.F4, T.F5 FROM ;
>>(select F1, F2, F3, F4, CAST(LEFT(F5,250) AS varchar(2500) as ShortF5 from Tab1 GROUP BY F1, F2, F3, F4, ShortF5) X ;
>>INNER JOIN Tab1 T ON T.F1 = X.F1 AND T.F2 = X.F2 AND T.F3 = X.F3 AND T.F4 = X.F4  AND T.F5 LIKE X.ShortF5+'%' ;
>>ORDER BY T.F1, T.F2, T.F3, T.F4

>>
>>May work longer.

Then you should use John's solution, e.g.

select T.F1, T.F2, T.F3, T.F4
from ...
GROUP BY ... INTO cursor FinalResult READWRITE


ALTER TABLE FinalResult ADD F5 M && hopefully this will work

scan FinalResult

    IF SEEK(F1+F2+F3+F4, 'Tab1', 'FieldsC')
         replace F5 with Tab1.F5 in FinalResult
   end
endscan