Oracle Certified Associate (OCA)
The Oracle Certified Associate for Database Administration is a basic certificate demonstrating above-average knowledge of Oracle database workings. We would suggest that database administrators, analysts, and developers with Oracle pursue this certification, and Database Administrators need it in today's competitive marketplace.
To get certified, you will require to pass the foundational exam and the Oracle Database 12c Administrator 1Z0-062 exam. There is no need to pay for Oracle training at this level, but you may find doing so helpful.