Q
Problem solve Get help with specific problems with your technologies, process and projects.

Replacing 8.1 datafile with 7.2 datafile

Is it possible to replace a datafile v. 8.1 with a datafile v.7.2? I have both DBs and I have to copy data from v7.2 to v.8.1. I have no time to do export and import.
I've never tried it, but I doubt that it will work. In version 8.0, Oracle changed the format of the ROWIDs and they may have also changed the format of the datafile headers (just guessing). In version 8.1, there were even more changes to the formats of tablespace records due to the availability of locally-managed tablespaces.

The ROWID change by itself shouldn't cause a problem since Oracle should automatically convert the old ROWIDs to the new format as it comes across them in the database. It's the other structures that I'd worry about.

Regardless of whether it "works" or not, I'm pretty confident that it would not be supported by Oracle, so you're headed into dark territory if maintaining Oracle support is important to you.

Dig Deeper on Oracle database installation, upgrades and patches

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

SearchDataManagement

SearchBusinessAnalytics

SearchSAP

SearchSQLServer

TheServerSide.com

SearchDataCenter

SearchContentManagement

SearchHRSoftware

Close