[oracle@testdb schema]$ sqlplus ‘/as sysdba’
SQL*Plus: Release 18.0.0.0.0 Production on Sat Jun 30 06:14:51 2018
Version 18.1.0.0.0
Copyright (c) 1982, 2017, Oracle. All rights reserved.
Connected to:
Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 – Production
Version 18.1.0.0.0
SQL> drop user hr cascade;
drop user hr cascade
*
ERROR at line 1:
ORA-28014: cannot drop administrative users
SQL> alter session set “_oracle_script”=true;
Session altered.
SQL> drop user hr cascade;
User dropped.
