Message-ID: <4C06D0EC.9050206@magwerks.com>
Date: Wed, 02 Jun 2010 16:45:16 -0500
From: Justin Graf <justin@magwerks.com>
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To: Wes James <comptekki@gmail.com>
CC: pgsql-sql@postgresql.org
Subject: Re: how to construct sql
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On 6/2/2010 2:52 PM, Wes James wrote:
>
>   **snip***
> Thx it is closer (with an end in the case):
>
> select
> case when MAX(page_count_count) - MIN(page_count_count)>  0 then
>         MAX(page_count_count) - MIN(page_count_count)
> else
>         MAX(page_count_count)
> end as day_max
> from page_count
> group by page_count_pdate order by page_count_pdate;
>
> the else puts out the total count on that day.  I would need
> max(page_count_count) - max(page_count_count_of_previous_day)
>
> thx,
>
> -wes
>    

A windowing query makes sense in this case  which i'm not very good at


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