Migrating is the process of transforming one database version to a later
database version. Oracle 7 to Oracle 8
is migration.
Upgrading is the process of transforming one database release to another
database release of the same database
version. Oracle 8.0.1 to 8.0.5 is upgrading database.
HTH
Erik - I believe the upgrade / recovery manual will have the more concise
definition you seek. Look for the Oracle version you are on and the one you
want to move to and it will tell you whether you need to upgrade or migrate.
With an upgrade you usually just bring up the new version and run some
