DISTINCTCOUNT of items and sum by previous month

[Anonymous]

Hi,

I want to create a DAX that can count the total of items and sum it by the previous month. As an example,

ItemID	ReceiveDate
A1	01/01/2020
A2	01/02/2020
A1	01/02/2020
B3	01/03/2020

Count of items and sum it by prev month,, (Jan, Jan+Feb, Jan+Mar,etc.) without creating a new table. I just need the CumulativeItemsCount field. ItemsCount is just a sample.

ReceiveDateMonth	ItemsCount	CumulativeItemsCount
Jan	1	1
Feb	2	3
Mar	1	4

Do I need to create a column that has the rank of the items filtered by the year and month before proceed with the CumulativeItemsCount column?

[amitchandak · Accepted solution]

@Anonymous , Create count measure

Count Item = count(Table[ItemID])

or
Count Item = distinctcount(Table[ItemID])

Then create a cumulative like

CumulativeItemsCount = calculate([Count Item], filter(allselected(Table]), Table[Date] <= Max(Table[Date])))