combining portals

[Heathbo]

Is it possible to combine 2 portals into 1.

For example. Say you have 4 tables. Tables 1 and 2 have records with identical keys. Is it possible to use table 3 to merge those portals so when you look at a portal(of table 3) in table 4, all the records in tables 1 and 2 are shown? I was just playing around and wondered if this was possible. If there is a better way, I would love to hear it.