I am trying to downgrade Oracle license from standard edition to standard one edition. Since the only difference between Standard and Standard one is the limitation of CPU numbers. My understanding is we don’t need to uninstall and reinstall the software to implement the downgrade. Please help to confirm if I am right. If not, what steps I should take?
Pl post OS and exact database versions. If 11gR2, there is no difference between Standard and Standard One editions of the software. So your assumption is correct, you do not need to uninstall and re-install the software.
How to Install "Standard Edition One" [ID 352618.1]