On Friday 09 January 2004 07:29, Dennis Björklund wrote:
> On Thu, 8 Jan 2004, Bradley Tate wrote:
> >
> > select invheadref, invprodref, sum(units)
> > from invtran
> > group by invheadref, invprodref
> For the above query, shouldn't you have one index for both columns
> (invheadref, invprodref). Then it should not need to sort at all to do the
> grouping and it should all be fast.
Not sure if that would make a difference here, since the whole table is being
read.
--
Richard Huxton
Archonet Ltd