Re: Sequence or timestamp or ?

Hi

    You can't use sequence in default column clause but you can create trigger which fill column.
for example

create or replace trigger trg_bi_on_table_name before insert
on table_name
for each row
begin
  select seq_t.nextval into :new.id from dual; end;

Anders Monrad wrote:

> Hi ..
>
> I need to make a table, with some kind of timestamp or system generated
> key. How would you do that in Oracle ? DB2 has mikrosecs in its
> timestamp, making it usefull, nut Oracle only has secs (WHY ??) so I
> cant use a DATE.
>
> I tried a sequence, but it is not valid as a default colunm clause in
> "create table".
>
> Can anybody tell me how something like this is done in Oracle (timestamp
> controlled by the system - keys generated by the system) ?
>
> Thank you ..
>
> Anders Monrad

Received on Wed Jun 16 1999 - 06:51:19 CDT