First time visitors this year vs last year

[joyhackett]

Thanks to another post, I was able to figure out how to get a count of members who visited for the first time in the selected date range.

Now, I am looking to compare that count with the number of first time visitors from the previous year.

I was hoping it would be easy to just put a DATEADD on the currentDate VAR, but I run into syntax errors.

Does anyone have any ideas on how to get last year's first time visitors?

This is the DAX to retrieve the current count:

(fact_branch_checkin_inc has all 9.2B visit records with the durable_member_key)

New visitors LY = 

VAR currentMembers = VALUES(fact_branch_checkin_inc[durable_member_key])
VAR currentDate = MIN(dim_date[full_date])

VAR pastMembers = CALCULATETABLE(VALUES(fact_branch_checkin_inc[durable_member_key]), 
    ALL(dim_date[full_date].[Month],dim_date[full_date].[MonthNo],dim_date[full_date].[Year])
    , dim_date[full_date]< currentDate)

VAR newCustomers = EXCEPT(currentMembers,pastMembers)

RETURN COUNTROWS(newCustomers)

Thanks in advance!

[joyhackett]

Thank you!

[amitchandak · Accepted solution]

@joyhackett ,

first time mean, the person did not came last year ?

New customer is the one you are looking  for

YTD = calculate([Sales],datesytd('Date'[Date]))
LYTD = calculate([Sales],DATESYTD(DATEADD('Date'[Date],-1,MONTH)))
Lost Customer= Sumx(VALUES(Customer[Customer Id]),if(ISBLANK([MTD]) && not(ISBLANK([LMTD])) , 1,BLANK()))
New Customer= sumx(VALUES(Customer[Customer Id]), if(ISBLANK([LMTD]) && not(ISBLANK([MTD])) ,1,BLANK()))
Retained Customer= if(not(ISBLANK([MTD])) && not(ISBLANK([LMTD])) , 1,BLANK())

Also refer if needed

Customer Retention Part 1:
https://community.powerbi.com/t5/Community-Blog/Customer-Retention-Part-1-Month-on-Month-Retention/b...
Customer Retention Part 2: Period over Period Retention :https://community.powerbi.com/t5/Community-Blog/Customer-Retention-Part-2-Period-over-Period-Retenti...