SQL>
SQL> -- A CYCLE sequence
SQL>
SQL>
SQL> CREATE SEQUENCE StudentNumSeq
2 INCREMENT BY 50000
3 START WITH 50000
4 MAXVALUE 99999
5 NOCACHE
6 CYCLE;
Sequence created.
SQL>
SQL>
SQL> select studentNumSeq.nextVal from dual;
NEXTVAL
----------
50000
SQL> select studentNumSeq.nextVal from dual;
NEXTVAL
----------
1
SQL> select studentNumSeq.nextVal from dual;
NEXTVAL
----------
50001
SQL>
SQL>
SQL> drop sequence studentNumSeq;
Sequence dropped.
SQL>
SQL>