12.1的升级路线图

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本文介绍了从不同版本的Oracle数据库直接或间接升级到Oracle12c Release1(12.1)的具体路径。直接升级适用于10.2.0.5、11.1.0.7及11.2.0.2或更高版本；间接升级则适用于11.2.0.1等版本，需先升级到中间版本。

Minimum version of the database that can be directly upgraded to Oracle 12c Release 1 (12.1)---直接升级

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

Source Database		Intermediate Upgrade Path for Target Database		Target Database
11.2.0.1	---->	11.2.0.2 or higher	---->	12.1.x
11.1.0.6	---->	11.1.0.7 or 11.2.0.2 or higher	---->	12.1.x
10.2.0.4 (or earlier)	---->	10.2.0.5 or later direct upgrade version	---->	12.1.x
10.1.0.5 (or earlier)	---->	10.2.0.5 or later direct upgrade version	---->	12.1.x
9.2.0.8 (or earlier)	---->	9.2.0.8 --> 11.2.0.2 or higher	---->	12.1.x

For example:

If you are upgrading from 11.2.0.1 or 11.1.0.6, then you must first upgrade to Oracle Database 11g Release 2 (11.2.0.2).
If you are upgrading from 10.2.0.2, 10.2.0.3, 10.2.0.4, or 10.1.0.5, then you must first upgrade to 10.2.0.5 or later.
For release 9.2.0.8, you must first upgrade to an intermediate Oracle Database release, as follows: 9.2.0.8 -> 11.2.0.2 or 11.2.0.3 -> 12.1

参考自：

Complete Checklist for Manual Upgrades to Oracle Database 12c Release 1 (12.1) (文档 ID 1503653.1)