Compare contrast 2 recordsets?

Question

Ok, I have one procedure that has two record set in it. The way that it looks is sort of like this.
create or replace
PROCEDURE PROC2RECS AS
BEGIN   
FOR rec IN (  SELECT some, information, FROM DB1 dblink to another db.
   LOOP    
        IF (condition etc...)       
        ELSIF (condition etc...)          
             -- UPDATE something
             -- SET something = someother thing;         
        ELSIF (condition etc...)
        END IF;      
   END LOOP;  
FOR rec2 IN (  SELECT some, information, FROM LocalDB
   LOOP    
        IF (condition etc...)       
        ELSIF (condition etc...)          
             -- UPDATE something
             -- SET something = someother thing;         
        ELSIF (condition etc...)
        END IF;      
   END LOOP;     
END PROC2RECS;Now these recordsets are coming from two different Oracle 8i databases is there a way to combine thes recordsets to get data from them?
In other words. Like do a
IF rec.id <>  rec2.id THEN
      output something;
END IF

Answer 1

You're limited in your options by still being on 8i. I'm not sure CAST() conversions against database types will work there, and the 10g set operations (which I've only gotten to work on simple one-element collections besides) won't work either.
One option is to load the data into tables (do global temporary tables exist in 8i?) and perform set operations on them.