Download the binary for OTN and extract the ZIP file: Choose “set up Software only” option: Upgrading existing Oracle database from 12cR2 to 18c In the unzipped binaries go to “bin” folder then search for dbua.bat file   You will see a list of pre-requisite checks that is being listed, in my case I will … Continue reading Upgrading Oracle database from 12cR2 to 18c in Windows