在SSRS中，DateDiff的否定结果为0

Question

I'm trying to set my results for an expression in SSRS to return 0 if the datediff results is negative. my expression is:

=DateDiff(DateInterval.Minute, Fields!Check_In_Time.Value, Fields!Date___Time.value)

and tried:

=Max(0,(DateDiff(DateInterval.Minute, Fields!Check_In_Time.Value, Fields!Date___Time.value))) --this one errors and doesn't run

but some results are negative, I want it to return a 0 if it's negative. Can anyone help?

Answer 1

This actually worked for me:

=IIF(DateDiff(DateInterval.Minute, Fields!Check_In_Time.Value, Fields!Date___Time.Value) <= 0, nothing, DateDiff(DateInterval.Minute, Fields!Check_In_Time.Value, Fields!Date___Time.Value))

Answer 2

Unfortunately, there's no function to do this in SSRS.

You'd just need to use an IIF to check for it and use 0 if the Date_Time was before the Check_In_Time .

=IIF(Check_In_Time > Date_Time, 0, DateDiff(DateInterval.Minute, Fields!Check_In_Time.Value, Fields!Date___Time.value))