Oracle Database is big. If you want to explore more Oracle to sharpen your skill and broaden your knowledge, you can check it the following top Oracle books.
- Beginning Oracle SQL for Oracle Database 18c
- Pro Oracle Database 18c Administration
- Pro Oracle SQL Development
- Oracle DBA Mentor
- Oracle High Availability, Disaster Recovery, and Cloud Services
- Business Process driven Database Design: with Oracle PL/SQL
- Dynamic Oracle Performance Analytics: Using Normalized Metrics to Improve Database Speed