am 16.12.2004, um 8:10:25 -0600 mailte Bruno Wolff III folgendes:
> On Thu, Dec 16, 2004 at 12:01:39 +0100,
> Andreas Kretschmer <[EMAIL PROTECTED]> wrote:
> > >
> > > considering that almost 70% of the rows will be with 'VALUE1', 20%
> > > will be with 'VALUE2' and 10% will be with 'VALUE3' on the average.
> > >
> > > should I create an index to speedup the counts or not ?
> >
> > Yes.
>
> Indexes will probably not help in this case. Even when looking at 10% of
> the rows, a sequential scan is still going to be faster than an index
> scan in most cases.
Okay.
Andreas
--
Andreas Kretschmer (Kontakt: siehe Header)
Tel. NL Heynitz: 035242/47212
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