Hi Bani,
I have just started preparing for Exam # 1Z0-007. I did some research on internet about reviews and recomendations for the preparation material. I found that the book "OCA/OCP: Introduction to Oracle9i SQL Study Guide" by Chip Dawes, Biju Thomas has very good ratings and reviews. And it's on sale (45% off) on
www.bookpool.com! Good Luck for the preparation!
Pinky