Unable to collapse rows after full outer joining several tables

Question

All -
I often do a "full outer join" on numerous tables when I want to report all of the
contents of all of the tables in one relatively easy to inspect set of output. However,
now that my "leading" table is missing certain values, my output is definitely not
what I want.
Here's a test case:
drop table test11;
create table test11 (x number);
insert into test11 values (1);
insert into test11 values (3);
drop table test12;
create table test12 (x number);
insert into test12 values (2);
insert into test12 values (3);
drop table test13;
create table test13 (x number);
insert into test13 values (1);
insert into test13 values (2);
drop table test14;
create table test14 (x number);
insert into test14 values (2);
commit;
select test11.x t11,
test12.x t12,
test13.x t13,
test14.x t14
from (((test11 full outer join test12 on test11.x = test12.x)
full outer join test13 on test11.x = test13.x)
full outer join test14 on test11.x = test14.x);
And here is the output:
T11 T12 T13 T14
1 1
3 3
2
2
2
5 rows selected.
Forgive me if this doesn't appear with a fixed-width font. I
don't know how to format these postings.
See rows 3, 4, and 5? My desire is to jam those
together so that my output is this instead:
T11 T12 T13 T14
1 1
3 3
2 2 2
3 rows selected.
Do you have any idea how to do this? Of course, I'll need to
apply the solution to the general case so that all
test cases similar to this are fixed!
Thanks very much for your time!
Tom G.

Answer 1

For anyone who's interested -
Here is the solution I was able to put together on my own:
select max(t11) t11, max(t12) t12, max(t13) t13, max(t14) t14 from
select coalesce(test11.x, test12.x, test13.x, test14.x) ct,
       test11.x    t11,
       test12.x    t12,
       test13.x    t13,
       test14.x    t14
  from (((test11 full outer join test12 on test11.x = test12.x)
                full outer join test13 on test11.x = test13.x)
                full outer join test14 on test11.x = test14.x))
group by ct;And the output:
       T11        T12        T13        T14
                    2          2          2
         1                     1
         3          3
3 rows selected.Bye,
Tom G.