With the release of Oracle Database 12c many new collateral will be available right now including our new White Paper:
White Paper:
Upgrading to Oracle Database 12cThis white paper outlines the methods available for you to upgrade and migrate your database to Oracle Database 12c. Learn about different use cases and key factors to consider when choosing the method that best fits your requirements.
And if you'd like to have a look into the new Oracle 12c documentation please find it here:
-Mike