Beginner & Advanced Classes. sql/oracle certification teaches you how to leverage a variety of database products, including oracle database training, MySQL, and PL/SQL. Join the largest learning community to reach your goals. Advance Your Career. | Beginner & Advanced Classes. sql/oracle certification teaches you how to leverage a variety of database products, including oracle database training, MySQL, and PL/SQL. Join the largest learning community to reach your goals. Advance Your Career.