Re: regd count(count(*)) in group by - Mailing list pgsql-hackers

Try this:

SELECT count(*) FROM (SELECT count(*)FROM testGROUP BY date_trunc('day', test_date)) as qry;


On Fri, 2002-07-26 at 16:03, Yuva Chandolu wrote:
> Hi,
> 
> We have a query "select count(count(*)) from test group by
> trunc(test_date)". This works fine with Oracle but when moving to postgres I
> changed it to "select count(count(*)) from test group by date_trunc('day',
> test_date)" but I get the following error
> 
> ERROR:  Aggregate function calls may not be nested
> 
> Can some one help me...
> 
> Thanks
> Yuva
> 
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