当 Archived_Date 为 NULL 并在 Age 列中返回 NULL 值时未计算 Statement Age 的情况

Question

CASE    
    WHEN Isconverted = 'TRUE'    THEN DATEDIFF(DAY, Task_CreatedDate, OPP.CreatedDate)
    WHEN Isconverted = 'FALSE'   THEN DATEDIFF(DAY, Task_CreatedDate, A.Archived_Date)
    WHEN A.Archived_Date IS NULL THEN DATEDIFF(DAY, Task_CreatedDate, GETDATE())
    ELSE 'NULL'
END AS 'Age'

** 当 Archive_Date 为 null 时语句不计算第三行的上述情况我需要用当前日期填充年龄列 - Task_CreatedDate **

Answer 1

我假设 A.Archived_Date IS NULL 的情况下，Isconverted 为真或假，因此将始终选择前两种情况之一。

因此，如果这是您需要将其作为第一种情况的优先级：

CASE    
    WHEN A.Archived_Date IS NULL THEN DATEDIFF(DAY, Task_CreatedDate, GETDATE())
    WHEN Isconverted = 'TRUE'    THEN DATEDIFF(DAY, Task_CreatedDate, OPP.CreatedDate)
    WHEN Isconverted = 'FALSE'   THEN DATEDIFF(DAY, Task_CreatedDate, A.Archived_Date)
    ELSE 'NULL'
END AS 'Age'

Answer 2

我想你想要：

(CASE WHEN Isconverted = 'TRUE'
      THEN DATEDIFF(DAY, Task_CreatedDate, OPP.CreatedDate)
      ELSE DATEDIFF(DAY, Task_CreatedDate, COALESCE(A.Archived_Date, GETDATE()))
 END) AS Age

Answer 3

您可以通过将CASE表达式放在DATEDIFF() function 中来简化代码，您可以在其中使用COALESCE()检查A.Archived_Date是否为NULL ：

DATEDIFF(
  DAY, 
  Task_CreatedDate, 
  CASE WHEN Isconverted = 'TRUE' THEN OPP.CreatedDate ELSE COALESCE(A.Archived_Date, GETDATE()) END
) AS Age