cannot perform an aggregate function on an expression containing an
aggregate or subquery
is the error i am getting while i am executing the query.
SELECT name
FROM (SELECT c.name, COUNT(p.clientid) p_count
FROM client c, project p
WHERE c.clientid = p.clientid
GROUP BY c.name) a,
(SELECT MAX(COUNT(clientid)) p_max
FROM project
GROUP BY clientid) b
WHERE a.p_count = b.p_max
clientid and name are the columns in client table
and projectid and clientid are the columns in project table.
santosh
-----Original Message-----
Ignaszak
Sent: Monday, September 30, 2002 6:09 PM
To: Multiple recipients of list ORACLE-L
try it:
select
name
from
(select c.name, count(p.id) p_count from clients c, projects p
where c.id = p.cl_id
group by c.name) a,
(select max(count(id)) p_max from projects
group by cl_id) b
where a.p_count = b.p_max
Regards,
Leszek
At 03:23 2002-09-30 -0800, you wrote:
>Hello all,
>
> I have a query ->
>i have 2 tables -> client and project
>
>fields in project table -> clientid/projectid
>fields in client table -> clientid/name
>
>i want to get the maximum orders one client has got. i mean a project
>having the greatest clients
>how to write it in single query ??
>
>
>like
>project 1 client 1
>project 2 client 1
>project 3 client 2
>
>in the above case, the query should return client ( 1 ).
>
>Thanks and regards,
>Santosh
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Author: Leszek Ignaszak
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Author: Santosh Varma
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