Oracle® Database
Database Upgrade Guide
21c
F17069-47
December 2025
Oracle Database Database Upgrade Guide, 21c
F17069-47
Copyright ©1996,2025,
Oracle and/or its affiliates.
Primary Author: Douglas Williams
Contributors: Frederick Alvarez, Mike Dietrich, Joseph Errede, Cindy Lim, Wei Lin , Byron Motta, Daniel Overby Hansen, Benjamin Speckhard, Carol Tagliaferri, Hector Vieyra, Philip Yam, Zhihai Zhang