Trying to narrow down a UNIONed query

Question

I've compared 2 tables using MINUS. There should have been no difference. Since there was, I used UNION to display the corresponding rows between both tables. Now, in my result set, I have to search through many rows that don't have correspondents to find rows that do.
Basically how do I narrow the UNION query down so that only the corresponding pair rows that have differences in their columns show up? I'm trying to use the primary key which is a combination of the first 5 columns. My query looks like this:
select
TRADE_DATE, ORDER_ROUTE_UID, ORDER_ENTRY_DATE, LEG_NBR, GROUP_SEQ_NBR,
AFFL_FIRM_GROUP_ID, REC_CREAT_DATE
from ors_firm_affl_hist@MSS_JOBS_HISTP01_LINK01.WORLD
union
select
TRADE_DATE, ORDER_ROUTE_UID, ORDER_ENTRY_DATE, LEG_NBR, GROUP_SEQ_NBR,
AFFL_FIRM_GROUP_ID, REC_CREAT_DATE
from ors_firm_affl_hist;
How can I use TRADE_DATE, ORDER_ROUTE_UID, ORDER_ENTRY_DATE, LEG_NBR, GROUP_SEQ_NBR in order to have the query display only the rows that have correspondents in the other table as opposed to rows that just aren't in either table?

Answer 1

Not sure if this meets your requirements;
SQL> with t1 as (
   select 'jon' first_name, 'smith' last_name, 'j' middle_init from dual union all
   select 'tom', 'a', 'a' from dual union all
   select 'bob', 's', 's' from dual union all
   select 'Stan', 'm', 'l' from dual union all
   select 'Kyle', 'b', 'r' from dual union all
   select 'Kenny', 'm', 'r' from dual union all
   select 'Eric', 'c', 'c' from dual),
     t2 as (
   select 'jon' first_name, 'smith' last_name, 'p' middle_init from dual union all
   select 'tom', 'a', 'l' from dual union all
   select 'bob', 's', 'j' from dual union all
   select 'Stan', 'm', 'l' from dual union all
   select 'Kyle', 'b', 'r' from dual union all
   select 'Kenny', 'm', 'r' from dual union all
   select 'Eric', 'c', 'c' from dual)
   select 'T1' source, first_name, last_name, middle_init from t1
   minus
   select 'T1' source, first_name, last_name, middle_init from t2
union all
   select 'T2' source, first_name, last_name, middle_init from t2
   minus
   select 'T2' source, first_name, last_name, middle_init from t1
order by 2,3,1
SO FIRST LAST_ M
T1 bob   s     s
T2 bob   s     j
T1 jon   smith j
T2 jon   smith p
T1 tom   a     a
T2 tom   a     l
6 rows selected.