Re: sum an alias

----- Original Message -----
From: "Wes James" <comptekki(at)gmail(dot)com>
To: <pgsql-sql(at)postgresql(dot)org>
Sent: Friday, June 04, 2010 2:30 PM
Subject: Re: [SQL] sum an alias

On Thu, Jun 3, 2010 at 11:54 PM, A. Kretschmer
<andreas(dot)kretschmer(at)schollglas(dot)com> wrote:
> In response to Wes James :
>> In the statement:
>>
>> select
>> MAX(page_count_count) - MIN(page_count_count) as day_tot,
>> MAX(page_count_count) as day_max, sum(MAX(page_count_count) -
>> MIN(page_count_count)) as tot,
>> page_count_pdate
>> from page_count
>> group by page_count_pdate order by page_count_pdate
>>
>> Is there a way to do sum(day_tot) also in the same statement?
>

You can use a nested SELECT.
Is there some reason preventing you from doing that?

Why don't you do something like

SELECT SUM(day_tot)
FROM (
select
MAX(page_count_count) - MIN(page_count_count) as day_tot,
MAX(page_count_count) as day_max,
page_count_pdate
from page_count
group by page_count_pdate
order by page_count_pdate );

Maybe I 'm misunderstanding the background of what you want to do

Best,
Oliveiros