Upgrading from 11gr1 to 11gr2 Using Data Pump Export/Import

• Export data from the current database using the Export utility shipped with the
  current database
• Install the new Oracle Database software
• If the new database has the same name as the current database, then shut down
  the current database before creating the new database
• Create the new database
• Start SQL*Plus in the new Oracle Database environment
• Connect to the database instance as a user with SYSDBA privileges
• Start an Oracle Database instance using STARTUP
• Optionally, you can change the storage parameters from the source database
• Use the Import utility of the new database to import the objects exported from the
  current database
• After the import, check the import log file for information about which imports of
  which objects completed successfully and, if there were failures, which failed
• If changes are made to the current database after the export, then make sure those
  changes are propagated to the new database before making it available to users