11gR2的升级路线图

Minimum version of the database that can be directly upgraded to Oracle 11g Release 2 (11.2)---直接升级

Source Database	Target Database
9.2.0.8 or higher	11.2.x
10.1.0.5 or higher	11.2.x
10.2.0.2 or higher	11.2.x
11.1.0.6 or higher	11.2.x

The following database versions will require an indirect upgrade path: --间接升级

Source Database		Upgrade Path for Target Database		Target Database
7.3.3 (or lower)	---->	7.3.4 -> 9.2.0.8	---->	11.2.x
8.0.5 (or lower)	---->	8.0.6 -> 9.2.0.8	---->	11.2.x
8.1.7 (or lower)	---->	8.1.7.4 -> 10.2.0.2(or any higher 10GR2 version)	---->	11.2.x
9.0.1.3 (or lower)	---->	9.0.1.4 -> 10.2.0.2 (or any higher 10GR2 version)	---->	11.2.x
9.2.0.7(or lower)	---->	9.2.0.8	---->	11.2.x

Complete Checklist for Manual Upgrades to 11gR2 (Doc ID 837570.1)

Complete Checklist to Upgrade the Database to 11gR2 using DBUA (Doc ID 870814.1)

http://www.oracle.com/technetwork/cn/testcontent/3-22-128077-zhs.pdf