What defined the Data Warehouse concept according to Bill Inmon?
Answer
A subject-oriented, integrated, time-variant, and non-volatile collection of data
Bill Inmon is credited as the conceptual father of the data warehouse (DW), establishing the foundational architectural blueprint. His definition emphasized four key characteristics: subject-oriented, meaning data is organized around major subjects rather than application processes; integrated, ensuring consistency across disparate source systems; time-variant, meaning data reflects changes over time; and non-volatile, indicating that data is stable once entered and not updated or deleted, supporting management's decision-making process effectively over historical periods.
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