You can include CONTAINER=CURRENT in the CREATE ROLE statement to specify the role as a local

role.

Reference:

Oracle Database Security Guide , Creating a Local Role

By design, you can quickly plug a PDB into a CDB, unplug the PDB from the CDB, and then plug this

PDB into a different CDB. The implementation technique for plugging and unplugging is similar to the

transportable tablespace technique.

A PDB is a portable collection of schemas, schema objects, and nonschema objects that appears to

an Oracle Net client as a non-CDB. All Oracle databases before Oracle Database 12c were non-CDBs.

Explanation:

Reference:

Benefits of the Multitenant Architecture for Database Consolidation

URL: http://docs.oracle.com/cd/E16655_01/server.121/e17633/cdbovrvw.htm#CNCPT89239

https://docs.oracle.com/database/121/NLSPG/ch2charset.htm#NLSPG1035

https://docs.oracle.com/database/121/LADBI/post_inst_task.htm#LADBI7749

https://docs.oracle.com/database/121/SUTIL/dp_overview.htm#SUTIL4334

Reference:

http://docs.oracle.com/cd/E16655_01/server.121/e15857/pfgrf_diag.htm#TGDBA95369 (table 7-1)

http://oracle-base.com/articles/12c/multitenant-startup-and-shutdown-cdb-and-pdb-12cr1.php

since 11g the syntax got changed to

RMAN> validate [check logical] database;

Example:

DGMGRL> validate database verbose d1

output include:

Block Corruptions found

NO

NO

Reference:

https://bugs.kde.org/show_bug.cgi?id=111460