Given activity over a period of days, I'd like to determine the maximum
activity over a given number of consecutive days.
The following SQL gives the maximum over one day, but I can't think how
to do it over more than one.
Well, I can but it's ugly and involves repeating the select statement,
adding a 'skip' for each additional day. And then that wouldn't give
consecutive days.

Select
t.attribute1, t.attribute2
(select first 1 sum(t.quantity)
from tbl_transactions t2
where t2.attribute1=t.attribute 1 and t2.attribute2=t.attribute2
and t2.posted between min(t.posted) And max(t.posted)
group by t2.posted
order by sum(t.quantity) desc
)
From
tbl_transactions t
Where
t.posted between ? And ?
Group by
t.attribute1, t.attribute2

The problem I'm trying to solve, is determining appropriate safety
stock.

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