Clients Running Total with Distinct Count

[baadshah]

Hi

I have a data set with client sales and i want to aggregate a running total of the distinct count of clients. So in sample data 2020 Q1 we started of with 1 client and everytime a new client joined it increase the count for each period in the new viz. I've seen few examples on DAX forum but couldnt get it to work for my case. Thanks

Sample Data: 

Period	Client Name
2020 Q1	Client 1
2020 Q1	Client 1
2020 Q2	Client 2
2020 Q3	Client 3
2020 Q4	Client 4
2021 Q1	Client 5
2021 Q1	Client 5

End Result:

Period	Running Distinct Count
2020 Q1	1
2020 Q2	2
2020 Q3	3
2020 Q4	4
2021 Q1	5

[v-tangjie-msft · Accepted solution]

Hi @baadshah ,

According to your description, here are my steps you can follow as a solution.

(1) My test data is the same as yours.

(2) We can create a measure.

Running Distinct Count = 
VAR CurrentPeriod = MAX('Sample Data'[Period])
RETURN
CALCULATE(
    DISTINCTCOUNT('Sample Data'[Client Name]),
    FILTER(
        ALLSELECTED('Sample Data'),
        'Sample Data'[Period] <= CurrentPeriod
    )
)

(3) Then the result is as follows.

Best Regards,

Neeko Tang

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