Stephan Szabo <sszabo@megazone23.bigpanda.com> wrote:
>
> If you use a scalar subquery, yes, but I think a subselect in from
> would help, maybe something like (if you want the total count)
>
> select table_name.id, sum(sum_col)||'/'||t2.count from table_name,
> (select count(*) as count from table_name) as t2 group by
> table_name.id,t2.count;
>
> or (if you want each count the counter per group) either
>
> select id, sum(sum_col)||'/'||count(*) from table_name
> group by id;
>
> or
>
> select table_name.id, sum(sum_col)||'/'||t2.count from table_name,
> (select id, count(*) as count from table_name group by id) as t2 where
> table_name.id=t2.id group by table_name.id,t2.count;
>
Give it up already, i was MAKING A POINT, not trying to make an
optimized count(*) thing :)
There are other examples that you cannot get around, that will be
evaluated more than once when a local "user variable" would make it not
need to.
Magnus
