Data Warehouse
A data warehouse is a centralized repository that stores integrated data from multiple sources, optimized for querying and analysis rather than transaction processing. It supports business intelligence activities by providing a consistent, historical view of data for decision-making. Data warehouses typically use Extract, Transform, Load (ETL) processes to consolidate and clean data from operational systems.
Developers should learn about data warehouses when building systems for business intelligence, reporting, or data analytics, as they enable efficient analysis of large volumes of historical data. Use cases include creating dashboards, performing trend analysis, and supporting data-driven decision-making in industries like finance, retail, and healthcare. It's essential for roles involving data engineering, analytics, or backend systems that require aggregated data views.