Grouped and non-grouped SELECT in one query: help!

Question

look first at: Wrong result when I use CASE on this forum. Here I wanted to get the user who created and the user who solved a problem (Lets call it Validation Error from now on (VE)).
The thing is: I already have a query who returns me lots of information about a VE.
The query in the previous thread returned me additional info about that VE (that is the creating_user and the solving_user). The 1st query is no group select, but the second is! Still, I need to combine those two in one query.
1st query:
select ve.seq,
     max((case vah.action when 'C' then vah.ur_code else null end)) created,
     max((case vah.action when 'S' then vah.ur_code else null end)) solved
from validation_errors ve
left outer join ver_action_histories vah
on (ve.seq = vah.ver_seq AND ve.log_date = vah.ver_log_date)
where ve.seq = 12860687
group by ve.seq;Result:
seq       | created | solved
12860687    Bob       Bobdont mind the "where"-clause, it is just to make the query go faster
what I do is: I join the VE with the ver_action_histories table which contains the users and what action they performed on a VE.
Now I just want to add that information to the results of an other query which also returns lots of information about a VE.
2nd query:
select ve.seq "VE seq", mh.seq "Counter seq",
          ve.log_date, ve.solve_date, ve.solved Status, ve.failure_code, ve.mde_code,
          mh.meter_type,
          iv.mr_type, iv.mr_reason,
          ih.mmr_seq
from validation_errors ve
inner join meter_histories mh
on (ve.mhy_seq = mh.seq)
left outer join index_values iv
on (ve.mhy_seq = iv.mhy_seq AND ve.log_date =iv.timestamp)
left outer join index_histories ih
on (ve.mhy_seq = ih.ive_mhy_seq)
where ve.seq = 8653936
and sysdate >= mh.start_date
and sysdate < mh.end_date;dont mind the "where" and "and"-clauses ... I hope the result of this query will simplify things ...
Result:
seq        |   counter seq | log_date | solved_date | status    | failure_code | ...
12860687       4568          1-jan-06   2-jan-06      Solved      ABCNow the actual question: Is it possible to combine those queries in one query? I just want the results of the first query (creating_user and solving_user) to be added as columns to the second result. Performance is very important. Please tell me that its possible?
Wanted Result:
seq        |   counter seq | log_date | solved_date | status    | failure_code | created  | solved  | ...
12860687       4568          1-jan-06   2-jan-06      Solved      ABC            Bob        BobIf anything I explained is unclear, please tell so I can try to explain it in an easier way.

Answer 1

Try an in line view:
select *
from
( <your first query goes here > ) a
, ( <your second query goes here > ) b
where a.seq = b.seq