How to apply patch 19.20.0.0 to Oracle Database
In this post describe how to apply a patch to our database. In this example, our database is version 19.3.0.0, and we are going to apply patch 19.20.0.0 (Patch 35320081: DATABASE RELEASE UPDATE 19.20.0.0.0). Although the procedure is usually similar, I always recommend reading the README file for the patches.

