Pivot That Increases Columns Dynamically With Column Header As Boundary Date For Each Week

Hi All,

The current/ Base table would be like below,





Products

level

Date


N1

b

11/5/2007


N2

p

11/6/2007


N3

p

11/7/2007


N4

p

11/14/2007


N5

b

11/15/2007


N6

p

11/23/2007




Expected Result.







<=11/7/2007

<= 11/14/2007

<=11/21/2007


b

1

1

2


p

2

3

4


Total

3

4

6




As you can see, the above table has cumulative data.
1. It calculates the number of Products submitted till a particular date- weekly
2. The date columns should increase dynamically(if the dates in base table increases) each time the query is executed
For ex: the next date would be 11/28/2007
I tried something like, it gives me count of €˜b€™ level and €˜p€™ level products by week
declare @date1 as datetime
select @date1 = '6/30/2007'
while (@date1 != (select max(SDate) from dbo.TrendTable))
begin
set @date1 = @date1 + 7
select Level, count(Products)
from
dbo.TrendTable
where SDate < @date1
group by Level
end
what I think is required is a pivot that dynamically adds the columns for increase in date range.
/Pls suggest if any other way of achieving it.
Pls help!!!

Thanks & Regards