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I'm planning to upgrade 3 instances of Oracle (all same Oracle Home) from 11.2.0.3 to 11.2.0.4. 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 11.2.0.3 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.

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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 Jul 1 '15 at 12:47

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