PROBLEMS INVOLVING TIME
There are several areas in data warehousing where time presents a problem. We'll now explore those areas.
The Effect of Time on the Data Model
Organizations wishing to build a data warehouse have often already built a data model describing their operational business data. This model is sometimes referred to as the corporate data model. The database administrator's office wall is sometimes entirely obscured by a chart depicting the corporate data model.
When building a data warehouse, practitioners often encounter the requirement to utilize the customer's corporate data model as the foundation of the warehouse model. The organization has invested considerably in the development of the model, and any new application is expected ...
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