Question

我有以下存储过程：

@Beginn Datetime,
@End Datetime
as
Begin
select  DATE,
IF((((SUM(ScheduleTime*(OkParts/100))/ SUM(PLannedTime)))) >1) then 1 else (((SUM(ScheduleTime*(OkParts/100))/ SUM(PLannedTime)))
from Rawdata where PartNo>0 and DATE> @Beginn and DATE< @End 
Group by DATE
Order by DATE DESC
End

然而，该过程会引发错误。

计算出的值是百分比值。由于用户输入不正确，在极少数情况下，该值可能高达250％，因此我想返回1（逻辑上该值只能是100％），否则只返回计算值。我还没有找到一个函数来设置存储过程返回的值的绝对上限。

Answer 1

这可能适合你：

@Beginn Datetime,
@End Datetime
as
Begin
select  DATE,
case when SUM(ScheduleTime*(OkParts/100))/ SUM(PLannedTime) >1 then 1 
    else SUM(ScheduleTime*(OkParts/100))/ SUM(PLannedTime) end
from Rawdata where PartNo>0 and DATE> @Beginn and DATE< @End 
Group by DATE
Order by DATE DESC
End

Answer 2

问题是你不能在select语句中使用流控制语句（例如if ... else，while ...）。您可以改用CASE语句。

Declare @Beginn Datetime
Declare @End Datetime

as
Begin
select  DATE,
(case when SUM(ScheduleTime*(OkParts/100))/ SUM(PLannedTime) >1 then 1 
    else SUM(ScheduleTime*(OkParts/100))/ SUM(PLannedTime) end) as ALIAS
from Rawdata where PartNo>0 and DATE> @Beginn and DATE< @End
Group by DATE
Order by DATE DESC
End

TSQL存储过程：如果存储过程中的Else语句返回1，则计算值大于1

2 个答案: