Review these topics to determine which is the best path for you to select to upgrade Oracle Databases.

• Overview of Converting Databases During Upgrades
  There are two methods to convert non-CDBs to multitenant architecture Oracle Databases during upgrades, and several different technologies you can use.
• About Upgrading Using Standby Databases
  You can perform rolling upgrades of databases by using Active Oracle Data Guard, or by using Oracle Enterprise Manager Cloud Control.
• Migrating From Standard Edition to Enterprise Edition of Oracle Database
  Review these options to migrate to Oracle Database Enterprise Edition from Oracle Database Standard Edition
• Migrating from Enterprise Edition to Standard Edition of Oracle Database
  Converting from Enterprise Edition to Standard Edition requires exporting and importing data.
• Migrating from Oracle Database Express Edition (Oracle Database XE) to Oracle Database
  You must upgrade from Oracle Database Express Edition to Oracle Database Enterprise Edition, and then upgrade to the current Oracle Database release.