Insight CMDB - Using foreign keys

[Martin Zelenohorský]

Hello, I have situation - Two tables, both filled automatically from other systems.

I need to make a reference between parameters, which are not Label.

1st table - "physical servers"

Having parameters:

Serial number (Label), Hostname

In second table "Database"

Having parameters:

DB name(Label), Hosted on server(suppose to be reference to "Hostname"

I need to create reference, between those tables, 

link "Hostname" with "Hosted on servers"

I suppose there must be a IQL query behind reference from table "Database" to table "Physical servers", which will allow me in table Database to filter values from parameter "Hostnames"(table Physical servers) 

Ps, i know ho to to connect tables using label, but what I would like is, to connect tables using parameters, where is non of them label.