Oracle provides a comprehensive set of tools for upgrading Oracle Database with minimal downtime and for migrating your applications to the new release.
Caution:
If you retain the old Oracle software, then never start the upgraded database with the old Oracle software. Only start the database with the executables in the new Oracle Database installation.
Topics:
catctl.pl) to run manual upgrades using parallel processing, inclusion and exclusion lists, and other features to manage your upgrade.catupgrd.sql script is replaced by the Parallel Upgrade Utility, catctl.pl, and the dbupgrade and dbupgrade.cmd scripts.