I have a table with all my customers. There are different types of customers. One type is "HOUSE" and second is "PERSON".
I have relation between two TO (CUSTOMERS::House ---< CUSTOMERS::Person).
This way I can describe persons living in different houses.
I have a summary field which counts how many person lives in every house.
I have a report which is sorted by "CITY" and shows HOUSES and how many PERSON lives in every house. I would like to improve it and have a summary of persons in every city, but it needs to sort of summary of summary fields. How to set it up?