Biju Thomas is Oracle ACE Director, Oracle Certified Professional, and Certified Oracle Database SQL Expert. Biju Thomas is the Global Oracle Practice Lead at Data Intensity (http://dataintensity.com). He is the author of Oracle12c OCA, Oracle11g OCA, co-author of Oracle10g, 9i, 8i OCP certification guides published by Sybex/Wiley. He is a frequent presenter at Oracle conferences and publishes articles for Oracle technical journals. Twitter @biju_thomas. Visit www.bijoos.com.