Tom Hammergren is a well-known BI innovator and speaker. He is the author of �Data Warehousing for Dummies,� �Data Warehousing: Building the Corporate Knowledge Base,� and �Data Warehousing on the Internet: Accessing the Corporate Knowledge Base.� He was a member of the initial Cognos BI team that produced PowerPlay and Impromptu and a member of the Sybase team that produced the Warehouse Studio product family. More recently, Hammergren is the founder of Balanced Insight and has led major BI transformations and initiatives for companies such as Procter & Gamble, Cinergy (now part of Duke Energy), Quantum Chemical and FirstEnergy. He can be reached by phone at (513) 891-6263 or via e-mail at firstname.lastname@example.org.
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