We are going to apply Oracle patch 18.104.22.168 on Oracle 22.214.171.124. We have 126.96.36.199 patch. We are using (DBUA) for this upgrade. As DBUA will check the preupgrade requisites, we want to run preupgrade check manually.
Could you please help where we can find preupgrade check?
How to run this script?
ORACLE_HOME should we run this script, as we have two ORACLE_HOME directories?