Yes! Thank you very much!!
Tom Lane wrote:
>Don Isgitt <djisgitt@soundenergy.com> writes:
>
>>I am trying to find rows in a table that are duplicates only in the
>>sense of certain columns; i.e, not all columns are the same, and then
>>for each duplicate entry, I want to retrieve one of the columns that is
>>not part of the duplication criteria.
>>
>
>Try SELECT DISTINCT ON. There's a simple example in the SELECT
>reference page (something about weather reports I think).
>
> regards, tom lane
>
>