Sql server 如何使GETDATE动态化，以便报告在任何日期运行时都应显示指定日期的信息

我需要编写一个SQL查询，使GETDATE成为动态的，这样，如果报表在任何日期运行，它都应该显示指定日期的信息

CASE WHEN PERIOD_TYPE='DAY' THEN 

(SELECT SUM(SALES_BUDGET) as SALES_BUDGET_DAY FROM 
(
SELECT SUM(SALES_BUDGET)  AS SALES_BUDGET
FROM ANALYSE.SGFOM_TX_BUDGET
WHERE CALENDAR_DAY='2020-11-29'--CAST(GETDATE()-1 AS DATE)
UNION ALL
SELECT SUM(SALES_BUDGET)  AS SALES_BUDGET
FROM ANALYSE.MYFOM_TX_BUDGET
WHERE CALENDAR_DAY='2020-11-29'--CAST(GETDATE()-1 AS DATE)
UNION ALL
SELECT SUM(SALES_BUDGET)  AS SALES_BUDGET
FROM ANALYSE.ID_TX_SAPBI_BUDGET
WHERE CALENDAR_DAY='2020-11-29'--CAST(GETDATE()-1 AS DATE)
--JOIN  SITE AND GROUP BY CATGEORYY ETC
) A )

---

您可以将其声明为变量：

DECLARE @date DATE=DATEADD(DAY,-1,CAST(GETDATE() AS DATE));

CASE WHEN PERIOD_TYPE='DAY' THEN 

(SELECT SUM(SALES_BUDGET) as SALES_BUDGET_DAY FROM 
(
SELECT SUM(SALES_BUDGET)  AS SALES_BUDGET
FROM ANALYSE.SGFOM_TX_BUDGET
WHERE CALENDAR_DAY=@date--CAST(GETDATE()-1 AS DATE)
UNION ALL
SELECT SUM(SALES_BUDGET)  AS SALES_BUDGET
FROM ANALYSE.MYFOM_TX_BUDGET
WHERE CALENDAR_DAY=@date--CAST(GETDATE()-1 AS DATE)
UNION ALL
SELECT SUM(SALES_BUDGET)  AS SALES_BUDGET
FROM ANALYSE.ID_TX_SAPBI_BUDGET
WHERE CALENDAR_DAY=@date--CAST(GETDATE()-1 AS DATE)
--JOIN  SITE AND GROUP BY CATGEORYY ETC
) A )

---

另外：我强烈建议不要使用

GETDATE（）-1

——这还不完全清楚。相反-使用

DATEADD

函数：

DATEADD（DAY；-1，GETDATE（））

更清晰-您希望从当前日期中减去1天。@marc_s+1，并且使用

SYSDATETIME（）