create sequence seq1 start with 1 increment by 1;2.create trigger tri_on_ins
before insert
on table_name
for each row
begin
select seq1.nextval into :new.id from dual;
end;
/
before insert
on table_name
for each row
begin
select seq1.nextval into :new.id from dual;
end;
/
MAXVALUE 1.0E28 MINVALUE 1 NOCYCLE
NOCACHE NOORDER;CREATE OR REPLACE TRIGGER USERADD
BEFORE INSERT ON MEMBERRG
FOR EACH ROW
BEGIN
SELECT LPAD(USERID.NEXTVAL,4,'0') INTO :NEW.NUM FROM DUAL;
END;