Data Warehouse

A data warehouse is a system for collecting and managing structured data from multiple sources for business intelligence.

What is a Data Warehouse?

A data warehouse is a centralized repository of integrated data from multiple sources, structured and optimized for query and analysis to support business intelligence and reporting.

Data warehouse characteristics

Schema-on-write, Structured data, Optimized for queries, Historical data, Business-focused.

Common misconceptions

"Data warehouse is outdated" — Still essential for BI
"Cloud replaces warehouses" — Cloud warehouses are common
"Any database is a warehouse" — Specific design patterns