Oracle Database Downgrade with the Downgrade Scripts from 19.3.0 to 12.2.0.1
A database downgrade is a very fast and efficient way to revert even days after an upgrade to the original setup - without losing any date. But COMPATIBLE has to stay at the source level. Watch the 3min video to see how such a downgrade works.
Find the Fallback Strategies slides here:
https://mikedietrichde.com/slides/