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First time orders in a given period

We would like to make a DAX measure that shows users that have had their first order in a period.


I tried using:

FirstInteractionDate = CALCULATE(MIN(orders[created_date]),DATESBETWEEN('Date'[Date],MINX(all('Calendar'),'Calendar'[Date]),MAX('Calendar'[Date]))) and New Customers = COUNTROWS(FILTER(VALUES(orders[]),[FirstInteractionDate] >= MIN('Calendar'[Date]))) to try and calculate it,


but it shows the active users, which are measured with this:
ordered_user_count = CALCULATE(DISTINCTCOUNT(orders[]), FILTER(orders, orders[order_count_per_customer] > 0))+0


with the order_count_per_customer being:
order_count_per_customer = CALCULATE(COUNTROWS(orders),FILTER(orders,orders[]=EARLIER(orders[])))


How would I calculate the first order users in a given period of time?


Super User
Super User

@Kareem_Amr_IT Maybe something along the lines of:

Measure = 
  VAR __MinDateInPeriod = MIN('Calendar'[Date])
  VAR __MaxDateInPeriod = MAX('Calendar'[Date])
  VAR __PreviousCustomers = 
  VAR __CustomersInPeriod = 
      FILTER('orders',[created_date]>=__MinDateInPeriod && [created_date]<=__MaxDateInPeriod),
  CONCATENATEX(EXCEPT(__CustomersInPeriod,__PreviousCustomers),[__customerID],", ")

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