Use a Numbers/Tally table or a calendar table to get the weeks you'd like to see as the left part of a left join and use ISNULL() function for weeks with no values returned from your query.
Edit: Oops... Sorry, Gus to almost quote you...:-P
Lutz
A pessimist is an optimist with experience. How to get fast answers to your question[/url]
How to post performance related questions[/url]
Links for Tally Table [/url] , Cross Tabs [/url] and Dynamic Cross Tabs [/url], Delimited Split Function[/url]