DAX: Attendance that excludes nursery and reception ONLY when aggregated

[StanleyBlack]

Hi everyone,

I have a simple problem but one thats frustrating me. I have school attendance data and I want to show on a table or matrix what the attendance is per year group but when it is aggregated at the bottom in the total it filters out Nursery and Recepetion year group data as this is not counted towards official statistics.

It should look something like this:

Year Group	Attendance
Nursery	90%
Reception	95%
Year 01	100%
Year 02	100%
Year 03	100%
Year 04	100%
Year 05	100%
Year 06	100%
Total	100%

I thought I had it but this is as close as I came:

Attendance Test1 = 
VAR __NumberOfYearGroups = DISTINCTCOUNT(Attendance[Year])
VAR __AttendancePerYearGroup = 
                            Divide(
                                SUM(Attendance[Attendance]),
                                SUM(Attendance[Sessions]))
VAR __AttendanceAggregated =
                            CALCULATE(
                                Divide(
                                    SUM(Attendance[Attendance]),
                                    SUM(Attendance[Sessions])),
                                NOT(Attendance[Year] IN {"Nursery", "Reception"}))
RETURN
IF(__NumberOfYearGroups = 1, __AttendancePerYearGroup,__AttendanceAggregated)

The problem is that it aggregates to the correct attendance but it adds all possible year groups and provides the aggregated attendance against those year groups not in the subset as shown in the picture below. What can I change to the meausre to make it both optimised and only return against Year groups with data?

Thanks in advance guys.

[jdbuchanan71 · Accepted solution]

Hello @StanleyBlack ,

I think we can get there with an ISINSCOPE and KEEPFILTERS.  Give this a try:

Attendance Pct Corrected = 
IF (
    ISINSCOPE ( Attendance[Year] ),
    DIVIDE ( SUM ( Attendance[Attendance] ), SUM ( Attendance[Sessions] ) ),
    CALCULATE (
        DIVIDE ( SUM ( Attendance[Attendance] ), SUM ( Attendance[Sessions] ) ),
        KEEPFILTERS ( NOT ( Attendance[Year] IN { { "Nursery" }, { "Reception" } } ) )
    )
)

[StanleyBlack]

@jdbuchanan71 

Worked like a charm. I hadn't come across ISINSCOPE before but off to research it now.

Thanks alot!