How to create table occurrences to display filtered data..??

I have a table called transactions.  Within that is a field called ipn_type.  I would like to create separate table occurrences for the different ipn types I may have.

For example, one value for ipn_type is "dispute".  In the past I would create a global field called "rel_dispute" and I would populate that with the value of "dispute".  Then I could create a new table occurrence of the transactions table, and make a relationship based on transactions::ipn_type -> transactions::rel_dispute.  This way only the dispute records would show up in my new table occurrence.  

Not long ago, somebody pointed out to me that this is no longer necessary, and there is a simpler way to setup such a relationship to create a new table occurrence.  I can't for the life of me remember how that was done, though.

Any information on this would be greatly appreciated.  Thanks!