I work with SQL and PL/SQL since 1992, including ETL and Data Warehouse and I have Oracle Certified Professional (Internet Application Developer Rel. 6/6i). I was instructor of Oracle Academy in Brasil, including those courses: Introduction to Oracle: SQL and PL/SQL, May/2000 Development PL/SQL Program Units, November/1999 Build Internet Applications I (Forms 6i), June/2000 Introduction to Oracle 9i - SQL. September/2001 Introduction to Oracle 9i - PL/SQL, September/2001 Build Internet Applications II (Forms 6i), February/2002 Tunning in SQL 9i (At9i), July/2002. Since 2004 I work with BI tools, like Microstrategy, Qlikview and OBIEE.