: It maintains a history of data changes over time, enabling long-term trend analysis and forecasting.
: It consolidates heterogeneous data from various sources into a unified, consistent format, ensuring a "single source of truth". Data Warehouse Systems: Design and Implementation
: Once data enters the warehouse, it is generally read-only and does not change, which preserves the integrity of historical records. Architectural Layers : It maintains a history of data changes
: Includes business intelligence (BI) tools, dashboards, and reporting interfaces for end-user interaction. Design & Implementation Stages Data Warehouse Systems: Design and Implementation