Question

I’m having trouble with an SSRS Expression. I am trying to get a distinct count of records for records that end in September. I am using the following code:

=(countdistinct(IIF(Fields!dischargemonth.Value = "September" and Fields!RowNumber.Value = 1, Fields!AuthId.Value, 0)))    

The correct count should be 28. I have double checked the query and there are only 28 records, but my output results in SSRS is showing 29.

I’ve tried using “COUNT” but I only want the distinct count of records so that won’t work. Any ideas on why this would occur?

Thank you in advance for your help.

Answer 1

Thank you for the insight Dave. So instead of using “0”, I updated the code to

=(countdistinct(IIF(Fields!dischargemonth.Value = "September" and Fields!RowNumber.Value = 1, Fields!AuthId.Value, "Nothing")))

And now the count shows 28, which is correct.