On 6/2/2010 12:31 PM, Wes James wrote: > On Wed, Jun 2, 2010 at 10:55 AM, Oliveiros > <oliveiros.crist...@marktest.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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