Keith Medcalf <kmedc...@dessus.com> wrote:
> Of course, your select simplifies to:
> 
> select -round((select avg(close)
>                from test2 b
>               where b.tkid between a.tkid-26 and a.tkid-13),2)
>  from test2 a

No it doesn't. You cannot just subtract numerators of the two fractions (avg(x) 
is a fraction of sum(x)/count(x)) when their denominators are different. 1/2 + 
1/3 != 2/5
-- 
Igor Tandetnik

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