No operations in last period

[Marco181]

In a table i would like to see the customers who haven t carried out trasactions in the last period.  I have a column where i have all customers and an other that i can use like count, does i need someone else? There is a way for tell at the filters "i want see what u are hiding"? I'm new with this program and dax languages, please be patient 

[amitchandak]

@Marco181 , Assume your last period is month and you have measure like

last MTD Sales = CALCULATE(SUM(Sales[Sales Amount]),DATESMTD(dateadd('Date'[Date],-1,MONTH)))

Not in last month = countx(Values(customer[Customer]) , if(isblank([last MTD Sales]) ,[Customer], blank() ) )

refer

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...