ROGER E. SANDERS, database performance engineer with Network Appliance Inc., is author of several books about DB2, including DB2 UDB V8.1 Certification Exam 700 Study Guide, DB2 Universal Database SQL Developer's Guide and DB2 Administration All-in-One Exam Guide. He has worked with DB2 for well over a decade, and holds eight IBM DB2 certifications, including IBM Certified Advanced Technical Expert (DB2 for Clusters) and IBM Certified Solutions Expert. A regular contributor to DB2 Magazine, he has authored database tutorials for IBM's DeveloperWorks website and presented at three International DB2 User Group conferences.