Re: how to construct sql

On 6/2/2010 12:31 PM, Wes James wrote:
> On Wed, Jun 2, 2010 at 10:55 AM, Oliveiros
> <oliveiros(dot)cristina(at)marktest(dot)pt> wrote:
>
>> Hi,
>> Have you already tried this out?
>>
>> select MAX(page_count_count) - MIN(page_count_count) from page_count group
>> by page_count_pdate.
>>
>>
>> Best,
>> Oliveiros
>>
> Oliveiros,
>
> Thx that mostly works. I just tried it and on the days there is only
> 1 entry it is 0 since max is the same as min so max - min is 0. Is
> there a way to take in to account the 1 entry days?
>
> Again thx - I appreciate your help :)
>
> -wes
>
>
Put in a 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)
from page_count
group by page_count_pdate.

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