Connect a grouped report to an ungrouped report with virtual ID column

Seems to be a simple problem. I have and grouped report where I want to see all facilities on a address.

For example:
Grouped View

Edit	Address	Amount of facilities
x	Germany, Dresden, Dresdner Strasse 1	2
x	Germany, Frankfurt, Frankfurter Strasse 1	3

Detail View

Address	Facility
Germany, Dresden, Dresdner Strasse 1	Computer System EXAXY
Germany, Dresden, Dresdner Strasse 1	Computer System KI
Germany, Frankfurt, Frankfurter Strasse 1	Manufactoring System 007
Germany, Frankfurt, Frankfurter Strasse 1	Manufactoring System 009
Germany, Frankfurt, Frankfurter Strasse 1	Manufactoring System 028

How to achieve this when we do not have a primary key and our key column includes commas which breaks the link. We easily generate an own ID column via an analytical function. In both reports we use an Oracle view to get the data from and our view looks like that:

select   facility_address,
         facility_name,
         dense_rank() over (order by facility_address) as facility_id
from     facilities

Via the function dense_rank and the partition by facility_address we get an unique ID for all facilities based on the address.
The grouped report looks like that:

select   facility_id,
         facility_address,
         count(facility_name) as amount_of_facilities
from     facilities

The detail report looks like that

select   facility_address,
         facility_name
from     facilities
where    facility_id = :P2_FACILITY_ID

Now you need to add a link in the report attributes section inside the grouped report. We set the item :P2_FACILITY_ID with our column #FACILITY_ID#.
That's it.