I'm planning to upgrade 3 instances of Oracle (all same Oracle Home) from to I'm going through the installer and I get to the question about Upgrade or install just the database software. I only want to upgrade one instance initially and leave the others running on in parallel. My question is, what's the difference between:

Install database software only Upgrade an existing database

I really don't want to touch the other SIDs on there.

1 Answer 1


Choose Install database software only, then later you can upgrade your databases one by one with DBUA (Database Upgrade Assistant) from the new Oracle Home, or by performing a manual upgrade.

  • Thank you, I did a bit more research and I agree this is the safest approach.
    – dwjv
    Commented Jul 1, 2015 at 12:47

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