create table a(a number);
create sequence SEQ_a
minvalue 1
maxvalue 999999999999999999999999999
start with 21
increment by 1
cache 20;
insert into a values(seq_a.nextval);
create sequence SEQ_a
minvalue 1
maxvalue 999999999999999999999999999
start with 21
increment by 1
cache 20;
insert into a values(seq_a.nextval);