Data warehousing has frequently been the subject of heated debate. Some controversies appear and quickly fade, while others continue to dominate press articles and industry conferences. Examples in this latter category include the topics of data marts and multidimensional design.

Recently, a new controversy has erupted over the subject of enterprise information integration (EII). Some people (particularly vendor marketing and salespeople) are arguing that EII can eliminate the need to build a data warehouse. Data warehousing purists, on the other hand, are saying that EII is just another form of virtual data warehousing, which has been proved in the past to be a failure.

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