Solution:
You can go to "Data Sources" link on the lower left side of the "Reporting" section.
In the "Data Source" field, choose a data object. In the below example, we choose the "Rate Plan" data object.
In this case, the "Rate Plan" object is pre-joined to the below objects. You can use any data from the below data objects in your query.
Account
Amendments
Bill To
Default Payment Method
Parent Account
Product
Product Rate Plan
Sold To
Subscription
Subscription Version Amendment
