I am trying to create a Union for two different inbound working datasets. The union has a section called "Columns used for the join". if I have one column on the 1st inbound transition called a subscriberky, and one column on the second inbound transition called the Enterprise_Customer_id, and those are the fields that i need to join on, how to I configure the "Columns used for join" section?
First of all for union activity, your targeting dimension needs to be the same. Then you can rename your join fields (label and alias) in each transition and use it in you union.