Auto increment number field

Question

Hello,
I would like to have a number field to be auto increment. Ho can I do that in Oracle must I use some code for it or can I make the field auto increment by itself.
Thanks

Answer 1

user3311314 wrote:
Hello,
I would like to have a number field to be auto increment. Ho can I do that in Oracle must I use some code for it or can I make the field auto increment by itself.
ThanksIt's a long standing gripe of mine. You must use code, and the appropriate solution is a sequence and a trigger, eg
SASH_CLIENT @ DB10G >create table t(
  2      id number not null primary key
  3  ,   c1 char(100));
Table created.
SASH_CLIENT @ DB10G >
SASH_CLIENT @ DB10G >create sequence seq_t;
Sequence created
SASH_CLIENT @ DB10G >
SASH_CLIENT @ DB10G >create or replace trigger bir_t
  2  before insert on t
  3  for each row
  4  begin
  5  select seq_t.nextval into :new.id from dual;
  6  end;
  7  /
Trigger created.
SASH_CLIENT @ DB10G >insert into t(c1) values ('row 1');
1 row created.
SASH_CLIENT @ DB10G >commit;
Commit complete.
SASH_CLIENT @ DB10G >select * from t;
        ID C1
         1 row 1I'd much prefer
create table t (
   id number primary key default seq_t.nextval
,  c1 char(100));