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Gavin Powell BSc. Comp. Sci., OCP DBA (Oracle Certified Professional) has 15 years of diverse experience in database administration and database development, both relational and object databases. His applications development experience is procedural and object-oriented. Consulting experience includes software vendors, Internet dotcoms, accounting, banking and financial services, the travel industry, construction, retail, mining, shipping, education, and in a general advisory capacity. Gavin is the author of five other Oracle titles, including three Oracle certification titles.