Derived column without trigger

Question

Hello eveyone,
I was wondering if anyone can tell me if it is possible to have a computed column on a Oracle Table (like in Excel formula's). Let's suppose this example:
CREATE TABLE MYTABLE
    BIRHTDAY DATE,
    AGE          NUMBER(10,4) (= (SYSDATE-BIRHTDAY) / 365) )
);This is an example; I know this does not make any sense. But that's the idea. I know I can have a column which can be updated through triggers (after insert/update of a given columns), or I can also create a view.
But is there any way to create a derived column with its logica defined within the create table statement?
Thanks for your help,
O.

Answer 1

Hi,
If yoo are on a lower version then one option you have is a view.
Keep your data as it is, write a view which will do the calculation and show you the result.
For example(a very basic one)
drop table test;
create table test (sal number, comm number);
alter table test add (emp_id number);
insert into test values (1,2,1);
insert into test values (3,2,2);
insert into test values (4,1,3);
insert into test values (5,2,4);
commit;
create or replace view v_test as select emp_id,sal,comm,sal+comm total from test;
select * from v_test;Cheers!!!
Bhushan