[oracle@node1 ~]$ sqlplus  /  as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Mon Jun 5 10:35:05 2017

Copyright (c) 1982, 2009, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> show user
USER is "SYS"
SQL> 

SQL> select ‘drop table ‘||tname||‘;‘ from tab;

‘DROPTABLE‘||TNAME||‘;‘
------------------------------------------
drop table BONUS;
drop table DEPT;
drop table EMP;
drop table SALGRADE;

SQL> select * from tab;

TNAME                   TABTYPE    CLUSTERID
------------------------------ ------- ----------
BONUS                   TABLE
DEPT                   TABLE
EMP                   TABLE
SALGRADE               TABLE

SQL>