Review these topics to understand Oracle Database terms, tools and processes.

• Definition of Terms Upgrading and Migrating
  Upgrading and migrating are different types of database changes.
• Upgrade and Data Migration Methods and Processes
  Oracle provides features and products to automate the upgrade process, and to assist you with completing upgrades efficiently.
• Oracle Database Releases That Support Direct Upgrade
  Review the supported options for direct upgrades to the latest Oracle Database release.
• Where to Find the Latest Information About Upgrading Oracle Database
  In addition to this document, Oracle provides information about upgrades on its support site, and through the AutoUpgrade utility using the preupgrade parameter.