March 2022
Intermediate to advanced
682 pages
22h 58m
English
Content preview from Databases Illuminated, 4th Edition
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15.6 Developing a Data Warehouse
There are three competing methodologies for developing data warehouses, called top-down, bottom-up, and data vault. The latter is a hybrid that was created to leverage advantages and mitigate disadvantages of the other two methods.
15.6.1 Top-Down Method
W. H. Inmon described his method of building a data warehouse as a top-down method, one that starts with a general solution that is gradually refined. He called for building an enterprise-wide data warehouse as the centerpiece for a Corporate Information Factory, which is a delivery framework for business intelligence. Because the data warehouse must support unanticipated queries and reports, it is impossible to determine all the system requirements in advance. ...
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