SQL>
SQL>
SQL> -- If you omit the MAXVALUE option, your sequence will automatically default to:
SQL>
SQL> -- MAXVALUE 999999999999999999999999999
SQL>
SQL> -- So you can simplify your CREATE SEQUENCE command as follows:
SQL>
SQL> CREATE SEQUENCE mySequence
2 MINVALUE 1
3 START WITH 1
4 INCREMENT BY 1
5 CACHE 20;
Sequence created.
SQL>
SQL> select mySequence.nextval from dual;
NEXTVAL
----------
1
SQL>
SQL>
SQL> drop sequence mySequence;
Sequence dropped.
SQL>