SQL>
SQL> create sequence mySeq start with 1000 increment by 1 cache 100;
Sequence created.
SQL>
SQL> create table myTable (col1 number primary key);
Table created.
SQL>
SQL> insert into myTable values (mySeq.nextval);
1 row created.
SQL> insert into myTable values (mySeq.nextval);
1 row created.
SQL>
SQL> select * from myTable;
COL1
----------
1000
1001
2 rows selected.
SQL>
SQL> drop table myTable;
Table dropped.
SQL>
SQL> drop sequence mySeq;
Sequence dropped.