Hi Mike,
>This is a really basic query which makes use of the GROUP BY and HAVING clauses:
>
>SELECT lastname, COUNT(*)
>FROM persontable
>GROUP BY lastname
>HAVING COUNT(*) > 1
>
>This query will return all the last names that are duplicated and the number of times their duplicated. If you want to return the entire name, you'll need to use the above query as a subquery:
>
>SELECT firstname, lastname
>FROM persontable
>WHERE lastname IN (
> SELECT lastname, COUNT(*)
> FROM persontable
> GROUP BY lastname
> HAVING COUNT(*) > 1)
>

Close! I can't believe I caught you. <VBG>

The subquery must return one value. i.e. eliminate the COUNT(*) from the select list. Then it works as you describe.