的動態列

Question

我有一個表，看起來像下面的總運行：

  W1 W2 w3 
Gold  10 2 3    
Silver  3 1 1 

，但我需要的結果：

  W1 W2 w3 
Gold  10 12 15    
Silver  3 4 5 

有什麼辦法，我可以得到這一結果？

我的SQL查詢：

SELECT 
    week1=[1],week2=[2],week3=[3] 
FROM 
(
    SELECT 
    [week]=DATEPART(ISO_WEEK,ta.enddate),ta.price 
    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 

Answer 1

前擺動數據

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 

舊版本

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