On Tue, Feb 18, 2003 at 10:26:46 +0600,
Anuradha Ratnaweera <[EMAIL PROTECTED]> wrote:
>
> My 3rd attempt to post ...
>
> Consider this query on a large table with lots of different IDs:
>
> SELECT id FROM my_table GROUP BY id ORDER BY count(id) LIMIT 10;
>
> It has an index on id. Obvio
>
> Consider this query on a large table with lots of different IDs:
>
> SELECT id FROM my_table GROUP BY id ORDER BY count(id) LIMIT 10;
>
> It has an index on id. Obviously, the index helps to evaluate
count(id)
> for a given value of id, but count()s for all the `id's should be
> evaluated,
