How to do Alias of multiple columns?

Question

Hello Pl/SQL gurus -
I have a sql query as following -
SELECT A as AA , B as BB, C as CC, D as DD, E as EE, F as FF
FROM
TABLE A
TABLE B
TABLE C
WHERE.....
Now i want to give some Alias say AAA to already aliased column AA,BB and BBB to CC,DD and CCC to EE and FF and want to print the values only at the level of AA,BB,CC,DD etc....
so now this will have two layer of hierarchy AAA, BBB, CCC and under that AA,BB, CC,DD and EE,FF respectively, where higher layer (AAA,BBB,CCC is just a representation) and AA,BB,CC,DD etc will have the actual values.
Something like -
AAA     ||     BBB      ||          CCC
AA     BB     CC     DD          EE     FF
how can i do it?
Kindly help me

Answer 1

user555994 wrote:
I agree Karthick that SQL should not do it as it is the presentation layer which is responsible for doing so......:)
But in case if try to achieve it using SQL then how can i do it...
as want to understand this and learn a new thing as well , as this will help in making me expose to new thing , as i have learned a lot with you guidance of lots of different experts/seniors and i am amazed with the knowledge bank available on this form.....
Thanks in advance for your help and timeThis is the best i could think of. But would never do it.
SQL> create table t( a integer, b integer, c integer, d integer)
  2  /
Table created.
SQL> insert into t (a, b, c, d) values (1, 1, 1, 1)
  2  /
1 row created.
SQL> insert into t (a, b, c, d) values (2, 2, 2, 2)
  2  /
1 row created.
SQL> select * from t
  2  /
         A          B          C          D
         1          1          1          1
         2          2          2          2
SQL> create or replace type col_obj as object(a integer, b integer)
  2  /
Type created.
SQL> create or replace type col_obj1 as object(c integer, d integer)
  2  /
Type created.
SQL> select col_obj (a, b) aa, col_obj1(c, d) bb
  2    from t
  3  /
AA(A, B)                       BB(C, D)
COL_OBJ(1, 1)                  COL_OBJ1(1, 1)
COL_OBJ(2, 2)                  COL_OBJ1(2, 2)
SQL>