Comparing two states row by row

[#1]

Hi guys,

I am trying to create a KPI which tells me the number of customers that purchased in one selection also purchased in the other. 

Not sure how to do this, anyone know?

This is my code in app:

SUM(If([Transaction Member ID]={Alt}[Transaction Member ID],1,0))

I may be doing this very wrong, any help is appreciated.

Thanks in advance.

[#2 · Accepted solution]

Ok, I think this will require changing the data structure. Thought there was an easier way :l.

Thanks for your help though

[sunny_talwar]

Sorry about that, I wish I could have been more helpful