Kevin,

>

>; WITH DateCTE (WeekEnding)  AS
>     -- Anchor query to get the first date
>     (SELECT @StartDate AS WeekEnding
>       UNION ALL
>          -- Recursive query to grab the rest of the dates
>          SELECT DateAdd(day,7,WeekEnding) AS WeekEnding FROM DateCTE
>             WHERE WeekEnding < @EndDate ),
>
>       -- 2nd CTE to grab the list of Vendors
>       VendorListCTE (VendorID)   AS
>         (SELECT VendorID FROM Purchasing.PurchaseOrderHeader
>             GROUP BY VendorID)
>

Thanks in providing a possible implementation using recursivism.

However it suprises me a bit that you would prefer this over the simple approach of using a temp table. I would not consider this alternative if it were only for the reason that it is it is less readable of what is going on (A common problem with CTE's anyways).

OTOH, it is a good example of how to impress other people not familiar with CTEs and implementing a simple problem in a difficult way. (TEST: give the two solutions to any SQL developer and ask them to figure out what is going on).