[英]CASE Expression with Dates conditional Logic
I have a logic in a query for a report that determines the number of days passed, excluding weekends. 在查询报表时,我有一个逻辑来确定通过的天数,不包括周末。 There are 2 possible start dates - the original receipt date or the date of a re-submit (if it exists).
有两个可能的开始日期-原始接收日期或重新提交的日期(如果存在)。 I am able to correctly calculate this using the following
CASE
statement 我可以使用以下
CASE
语句正确计算此值
CASE WHEN [ResubmitReceivedDate] IS NULL THEN
(SELECT
(DATEDIFF(dd, [OriginalReceivedDate] , [AnalysisDate]) + 1)
-(DATEDIFF(wk,[OriginalReceivedDate] , [AnalysisDate]) * 2)
-(CASE WHEN DATENAME(dw, [OriginalReceivedDate] ) = 'Sunday' THEN 1 ELSE 0 END)
-(CASE WHEN DATENAME(dw, [AnalysisDate]) = 'Saturday' THEN 1 ELSE 0 END)
)
ELSE
(SELECT
(DATEDIFF(dd, [ResubmitReceivedDate], [AnalysisDate]) + 1)
-(DATEDIFF(wk, [ResubmitReceivedDate], [AnalysisDate]) * 2)
-(CASE WHEN DATENAME(dw, [ResubmitReceivedDate]) = 'Sunday' THEN 1 ELSE 0 END)
-(CASE WHEN DATENAME(dw, [AnalysisDate]) = 'Saturday' THEN 1 ELSE 0 END)
)
However, there are some instances when the [AnalysisDate]
comes before the [ResubmitReceivedDate]
, and in these instances, the [OriginalReceivedDate]
should still be used even though a [ResubmitReceivedDate]
exists. 但是,在某些情况下
[AnalysisDate]
在[ResubmitReceivedDate]
之前,并且在这些情况下,即使[ResubmitReceivedDate]
存在,仍应使用[OriginalReceivedDate]
。
How can I add this logic to the above CASE
statement? 如何将这种逻辑添加到上面的
CASE
语句中?
Seems like the simplest solution would just be to add another When
condition. 似乎最简单的解决方案只是添加另一个
When
条件。 Something like this: 像这样:
WHEN DateDiff(day, [ResubmitReceivedDate], [AnalysisDate]) > -1 THEN
(Select
(DATEDIFF(day, [OriginalReceivedDate] , [AnalysisDate]) + 1)
-(DATEDIFF(week,[OriginalReceivedDate] , [AnalysisDate]) * 2)
-(CASE WHEN DATENAME(weekday, [OriginalReceivedDate] ) = 'Sunday' THEN 1 ELSE 0 END)
-(CASE WHEN DATENAME(weekday, [AnalysisDate]) = 'Saturday' THEN 1 ELSE 0 END)
)
Which would make your final case 这将使您成为最后的案例
Case
WHEN [ResubmitReceivedDate] IS NULL THEN
(Select
(DATEDIFF(day, [OriginalReceivedDate] , [AnalysisDate]) + 1)
-(DATEDIFF(week,[OriginalReceivedDate] , [AnalysisDate]) * 2)
-(CASE WHEN DATENAME(weekday, [OriginalReceivedDate] ) = 'Sunday' THEN 1 ELSE 0 END)
-(CASE WHEN DATENAME(weekday, [AnalysisDate]) = 'Saturday' THEN 1 ELSE 0 END)
)
WHEN DateDiff(day, [ResubmitReceivedDate], [AnalysisDate]) < -1 THEN
(Select
(DATEDIFF(day, [OriginalReceivedDate] , [AnalysisDate]) + 1)
-(DATEDIFF(week,[OriginalReceivedDate] , [AnalysisDate]) * 2)
-(CASE WHEN DATENAME(weekday, [OriginalReceivedDate] ) = 'Sunday' THEN 1 ELSE 0 END)
-(CASE WHEN DATENAME(weekday, [AnalysisDate]) = 'Saturday' THEN 1 ELSE 0 END)
)
Else
(SELECT
(DATEDIFF(day, [ResubmitReceivedDate], [AnalysisDate]) + 1)
-(DATEDIFF(week, [ResubmitReceivedDate], [AnalysisDate]) * 2)
-(CASE WHEN DATENAME(weekday, [ResubmitReceivedDate]) = 'Sunday' THEN 1 ELSE 0 END)
-(CASE WHEN DATENAME(weekday, [AnalysisDate]) = 'Saturday' THEN 1 ELSE 0 END)
)
End
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