Roger E. Sanders, database performance engineer with Network ApplianceInc., is author of several books about DB2 UDB, including DB2 UniversalDatabase SQL Developer's Guide and DB2 Administration All-in-One ExamGuide. He has worked with DB2 for well over a decade, and holds eightIBM DB2 certifications, including IBM Certified Advanced DatabaseAdministrator - DB2 UDB V8.1, IBM Certified Application Developer - DB2UDB V8.1, and IBM Certified Advanced Technical Expert (DB2 forClusters). He also speaks at the International DB2 Users' Group (IDUG)and Regional User Group (RUG) conferences and is a regular contributorto DB2 Magazine.