We have few eVars that we have capturing for sometime. Like order id and cart id and campaign id. I would like to know what was the rank of particular value in those eVars. For example what is first, 2nd, so on campaigns for a customer.
The use case is -
1. Find which campaign is effective when it is displayed to the customer for the first time.
2. What was the average time for purchase when the order was the first order for the visitor?