Because the standard table `Address` does not provide a way to lookup the 'Country' and the 'PostalCode' we created the following 3 tables:
- Address
- Columns: StreetName, HouseNr, PostalCode
- Relationship: Address_ManyToOne_PostalCode
- PostalCode
- Columns: PostalCode, CityName, Country
- Relationship: PostalCode_ManyToOne_Country
- Country
- Columns: CountryName, CountryShortCode
- Relationship: Country_OneToMany_PostalCode
This all seems to be working fine. Now we would like to display the following columns in the 'Main' view called "Active addresses':

The issue is that we would like to display the 'CountryName' or 'CountryShortCode' in the View but these fields aren't available from the dropdown list when adding a new column. How is it possible to do this?