For more information about Oracle Database 12c Release 2 (12.2):
Visit the Oracle Database 12c Release 2 (12.2) Online Documentation Library by performing the following steps:
Click Start and then Programs.
Select Oracle Database 12c Release 2 (12.2), then Get Help, and then Read Documentation.
Visit the Oracle Database 12cRelease 2 (12.2) Online Discussion forum by performing the following steps:
Click Start and then Programs.
Select Oracle Database 12c Release 2 (12.2), then Get Help, and then Go To Online Forum.