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.