I really hate the response “RTFM” in the forums, but sadly it was appropriate in my case. Let me save you some grief when you start playing with 12c. If you do not need to use a CDB (container database) or PDB (pluggable database), then uncheck the “Create as Container database” check box during the installation.
If you leave that checked you will quickly learn that you can’t create a local user in the root container.
$ sqlplus sys as sysdba SQL*Plus: Release 220.127.116.11.0 Production on Wed Jun 26 07:08:11 2013 Copyright (c) 1982, 2013, Oracle. All rights reserved. Enter password: Connected to: Oracle Database 12c Enterprise Edition Release 18.104.22.168.0 - 64bit Production With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options SQL> GRANT DBA, CONNECT, RESOURCE TO STEVE IDENTIFIED BY dbl-secret-pwd; GRANT DBA, CONNECT, RESOURCE TO STEVE IDENTIFIED BY dbl-secret-pwd * ERROR at line 1: ORA-65049: creation of local user or role is not allowed in CDB$ROOT