On 12/7/05, Alex <alex(at)meerkatsoft(dot)com> wrote:
>
> I have a table where I store changes made to an order. The looks like
> ProdID, ChangeDate, Change1, Change2, ... etc.
> Some ProdIDs have multiple records.
> Is there an easy way to delete all records of a ProdID except the most
> recent (ChangeDate is timestamp) one? Preferably in one SQL statement?
>
delete from table_name where exists (select * from table_name x where
x.prodid = table_name.prodid and x.changedate > table_name.changedate);
this should work.
depesz