Oracle Upgrade utility scripts help to carry out Oracle Database upgrades.

• Scripts for Upgrading Oracle Database
  Oracle provides a set of tools and scripts for upgrades that you run before, during, and after upgrading.
• Pre-Upgrade Information Tool and AutoUpgrade Preupgrade
  Learn how to obtain the same features previously offered through the Pre-Upgrade information tool (preupgrade.jar) by using AutoUpgrade with the preupgrade clause.