Need to Count Distinct Dates by Id Number

[jbruns]

Hi All,

I have the below example of my data. I need to count the distinct dates (excluding blanks) by Id. I'm ultimately trying to find out how many ids have multiple dates. The Is Current column indicates the latest row of data. So.. in a month from now for Id = 181209 it's possible for it to have another date and therefore another line in the data. 

Date	Id	Is Current
1/15/2022	181209	FALSE
2/12/2022	181209	TRUE
	200077	FALSE
	200077	TRUE
2/12/2022	1048707	FALSE
2/12/2022	1048707	TRUE

This is what I'm trying to get:

Date	Work Item Id	Is Current	Count	Multiple_Dates
1/15/2022	181209	FALSE	2	Yes
2/12/2022	181209	TRUE	2	Yes
	200077	FALSE
	200077	TRUE
2/12/2022	1048707	FALSE	1	No
2/12/2022	1048707	TRUE	1	No

In the new version of the table, I have a count of date changes by Id. The first one, 181209 has had two dates associated with it, the second doesn't have any dates at all, and the last one continues to have the same date. I want to use the multiple dates column as an indicator for something else.  

I can't seem to get it to calculate by group correctly. This is what I've tried so far:

Count = CALCULATE(DISTINCTCOUNTNOBLANK('Table'[Date]),GROUPBY('Table','Table'[Id]))

This gives me the following:

Date	Work Item Id	Is Current	Count
1/15/2022	181209	FALSE	1
2/12/2022	181209	TRUE	1
	200077	FALSE
	200077	TRUE
2/12/2022	1048707	FALSE	1
2/12/2022	1048707	TRUE	1

Can anyone help with this and let me know what I'm missing?

[jbruns]

This worked. Thank you!

[v-stephen-msft]

Hi  @jbruns ,

@AlexisOlson 's formula worked.

Then select 'Show items with no data', which will show rows with no data.

Best Regards,

Stephen Tao

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[AlexisOlson · Accepted solution]

Try ALLEXCEPT instead of GROUPBY.

Count =
CALCULATE (
    DISTINCTCOUNTNOBLANK ( 'Table'[Date] ),
    ALLEXCEPT ( 'Table', 'Table'[Id] )
)