T-sql :get SUM of Columns

Question

I have a table that looks something like the following :

          W1  W2 w3
Gold      10    2    3              
Silver     3    1    1

but i

Answer 1

Calculate the running total before pivoting the data

SELECT element, 
       week1=[1],week2=[2],week3=[3]
FROM
(
SELECT [week] = DATEPART(ISO_WEEK,ta.enddate),
       price = sum(ta.price)Over(Partition by element Order by enddate),
       element  
FROM table1 ta 
where ta.enddate BETWEEN '2016/01/01' AND '2016/12/31'
) src
PIVOT
(
 SUM(price) FOR week IN ( [1],[2],[3])
) piv

for older versions

SELECT element, 
       week1=[1],week2=[2],week3=[3]
FROM
(
SELECT [week] = DATEPART(ISO_WEEK,ta.enddate),
       cs.price,
       element  
FROM table1 ta 
cross apply(select sum(price) from table1 tb 
            where ta.element = tb.element and ta.enddate >= tb.enddate ) cs (price)
where ta.enddate BETWEEN '2016/01/01' AND '2016/12/31'
) src
PIVOT
(
 SUM(price) FOR week IN ( [1],[2],[3])
) piv