Koen Verbeeck (3/10/2014)
That is fascinating.Is there also a question?
Hint: read the links How to post forum questions[/url] and Need an answer? No, you need a question.
ps: just to shove you in the right direction: group by week (use the DATEPART function to find the week) and count the orders.
Instead of DATEPART, I would suggest a date calculation to get the first (or last) day of the week to group by it as it would be more descriptive.