Company: Ruckert, Inc. Biography Roger is an Oracle 10g Certified Database Administrator. He has been working with Oracle products since Oracle 5 in 1986, mostly as a DBA but also as a developer. His current performance tuning engagements involve the product suite of Oracle Retail (formerly Retek). He has given presentations at local Twin Cities (MN) chapters of DECUS, ACM, and TCOUG, and has spoken at national DECUS, Retek, and IOUG conferences. He has also taught a customized SQL tuning class to several clients.