I came to BIOVIA with a background in mainly PostgreSQL and ANSI SQL on Databricks, so there has been much to learn about Oracle since I've started working on CISPro. The Oracle Dev Gym is the single best free online resource that I have found for learning Oracle. If you are looking to develop more SQL and Oracle expertise, I strongly recommend checking it out!

https://devgym.oracle.com/pls/apex/f?p=10001:20011::::20011::