Review changes in behavior between Oracle Database 11g release 2 (11.2) or Oracle Database 12c release 1 (12.1).
Behavior changes typically require you to make informed decisions to minimize risks that Oracle Database changes can create for in an upgraded Oracle Database. This appendix does not describe all changed behavior and new features in each release of Oracle Database.
Oracle Database New Features Guide for a complete list of all new features introduced in this release
Oracle Database Reference “Changes in this Release” section for a list of new initialization parameters, new static data dictionary views, and new dynamic performance views
Oracle Database Installation Guide for your operating system for more information about operating system parameter changes
Your operating system-specific Oracle documentation for more information about these initialization parameters.