Hi Don.
On Sat, Jul 21, 2001 at 03:28:45PM -0500, [EMAIL PROTECTED] wrote:
[...]
> > There is one exception, though, there are compound keys, which will be
> > of use. So,
> >
> > INDEX(id), INDEX(id)
> >
> > makes no sense, but
> >
> > IDNEX(id), INDEX(id,ordernr)
> >
> > may make sense.
> >
>
> Benjamin, I'll pick a nit here.
> A query on id only can use either index, a query on id & ordernr could
> also use both indexes but the second one would be more useful.
> A query on ordernr only can't use either, and will result in a full scan.
>
> ITYM:
> INDEX(id), INDEX(ordernr,id)
Of course, you are right. I was sloppy in my example.
Best regards,
Benjamin.
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