如何在同一查询中计算出YTD和以前的YTD?
我尝试计算体重和体重ytd。我并没有理解如何在同一查询中添加先前ytd的计算。
SELECT SUM(CASE
WHEN convert(date,s.Delivery_Year+'-'+ s.Delivery_month+'-'+ s.Delivery_day) BETWEEN dateadd(yy, DATEDIFF(yy, 0, GETDATE()), 0) AND GETDATE() THEN s.Weight
ELSE 0
END) AS WeightYTD ,
sum(Weight) AS weight ,
[Sales_Organization] ,
[Market_Grp] ,
[Delivery_Year] ,
[Delivery_month] ,
Delivery_day
FROM Fact_sales s
GROUP BY ,
[Sales_Organization] ,
[Market_Grp] ,
[Delivery_Year] ,
[Delivery_month] ,
Delivery_day
答案 0 :(得分:0)
对于您真正想要的结果/行为还不清楚。
一种可能的解释是,“迄今为止”是相对于表中的日期,而不是相对于“ today” / GETDATE()
。
所以...
14th March 2018
:YTD = 1st Jan 2018
至14th March 2018
20th March 2019
:YTD = 1st Jan 2019
至20th March 2019
在这种情况下,我将执行以下操作以获取YTD
列...
WITH
grouped_by_date AS
(
SELECT
[Sales_Organization],
[Market_Grp],
[Delivery_Year],
[Delivery_Month],
[Delivery_Day],
SUM([Weight]) AS Weight
FROM
Fact_sales s
GROUP BY
[Sales_Organization],
[Market_Grp],
[Delivery_Year],
[Delivery_Month],
[Delivery_Day]
),
cumulative_sum_for_ytd AS
(
SELECT
*,
SUM([Weight]) OVER (PARTITION BY [Delivery_Year]
ORDER BY [Delivery_Month], [Delivery_Day]
)
AS Weight_YTD
FROM
grouped_by_date
),
SQL Server 2008中没有LAG()
函数,但是可以模拟它的“骇客技巧” ...
hack_to_do_lag AS
(
SELECT
*,
CASE
WHEN [Delivery_Year]%2=1
THEN MAX(CASE WHEN [Delivery_Year]%2=0 THEN [Weight_YTD] END) OVER (PARTITION BY ([Delivery_Year]+0)/2)
ELSE MAX(CASE WHEN [Delivery_Year]%2=1 THEN [Weight_YTD] END) OVER (PARTITION BY ([Delivery_Year]+1)/2)
END
AS Weight_PreviousYTD
FROM
cumulative_sum_for_ytd
)
SELECT
*
FROM
hack_to_do_lag