Quote Originally Posted by kpate
Still I won't to know what method others follow for their database upgrade.
Most refer to the documentation when doing upgrades:

http://download.oracle.com/docs/cd/B...o.htm#sthref10


To Quote the Propaganda:

Note:

The DBUA is the recommended method for upgrading a database. Beginning with release 10.2, you can also use the DBUA to upgrade to a new patch release of Oracle 10g release 2.