Steve O'Hearn
OCA Oracle Database SQL exam guide
OCA Oracle database- OCA Oracle Database SQL Exam Guide (Exam 1Z0-071)
OCP developer PL/SQL program units exam guide- OCA Oracle database
- OCA/OCP MySQL Database Administrator All-in-One Exam Guide (Exams 1Z0-870, 1Z0-873, & 1Z0-874)
- OCP Developer PL/SQL Program Units Exam Guide with cd
- Ocp MySQL 5. 6 Database Administrator Exam Guide (Exam 1z0-883)