On Fri, Jul 5, 2013 at 5:09 AM, Jayadevan M
<jayadevan.maymala@ibsplc.com> wrote:
>
> So each student may get counted many times, someone with 99 will be counted
> 10 times. Possible to do this with a fat query? The table will have many
> thousands of records.
>
Not sure I got the point, but I guess this is a good candidate for a CTE:
WITH RECURSIVE t(n) AS (
VALUES (10)
UNION ALL
SELECT n+10 FROM t WHERE n < 50
)
select count(*), t.n from m, t where mark > t.n group by t.n;
Luca