12c upgrade

Step by Step Upgrade Oracle RAC Grid Infrastructure and Database from 11g to 12c

Migrate and Upgrade Oracle 11gR2 Windows Database to Oracle 12cR2 Linux Database using Datapump

Manual Upgrading Oracle Database From 11.2.0.4 to 12.2.0.1

Upgrade Oracle Database From 11.2.0.4 to 12.1.0.2 Using DBUA Method