It appears that there is no concept of AUTO_INCREMENT in Oracle, up until and including version 11g.
How can I create a column that behaves like auto increment in Or
create trigger t1_trigger before insert on AUDITLOGS for each row begin select t1_seq.nextval into :new.id from dual; end;
only I have to just change the table name (AUDITLOGS) with your table name and new.id with new.column_name