Preface
Data warehousing has been around for about 2 decades now and has become an essential part of the information technology infrastructure. Data warehousing originally grew in response to the corporate need for information—not data. A data warehouse is a construct that supplies integrated, granular, and historical data to the corporation.
But there is a problem with data warehousing. The problem is that there are many different renditions of what a data warehouse is today. There is the federated data warehouse. There is the active data warehouse. There is the star schema data warehouse. There is the data mart data warehouse. In fact there are about as many renditions of the data warehouse as there are software and hardware vendors.
The problem ...
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