Alias in a query

Question

Hi,
I want to change the database field name in a query. That is, I have several fields in the database called cappto00, cappt01 and cappto02.
The cappto00 value is the present week, the cappt01 value is the following and catppto02 the following of cappt01 and the names for every field are S-1,S-2 and S-3.
I typed the following query
select cappto00 as concat('S-',to_char(sysdate,'ww'),
cappto01 as concat('S-',to_char(sysdate,'ww'+1),cappto02 as concat('S-',to_char(sysdate,'ww'+2)
from esml.sml_canels
But I have the following error:
ora-00923: FROM keyword not found where expected.
I know the alias must be a string. How can I do it?
Thanks.

Answer 1

Would I prefer to create VIEW though procedure?
So every week or whenever necessary you can execute the
procedure to re-create view with new columns( according to your
supposed week number).
SQL> create table sms( cappto00 number,
  2  cappto01 number, cappto02 number ) tablespace jam;
Table created.
SQL> insert into sms values(1001,2001,3001);
1 row created.
SQL> create or replace procedure sms_pro as
  2  m varchar2(10):=concat('S_',to_char(sysdate,'WW'));
  3  n varchar2(10):=concat('S_',to_char(sysdate,'WW')+1);
  4  p varchar2(10):=concat('S_',to_char(sysdate,'WW')+2);
  5  begin
  6  execute immediate 'create or replace view ' ||
  7  'sms_view('||m||','||n||','||p||') as select * from sms';
  8  end;
  9  /
Procedure created.
SQL> execute sms_pro
PL/SQL procedure successfully completed.
SQL> select * from sms_view;
   S_30    S_31    S_32
   1001    2001    3001