Every time a company like Amazon analyzes millions of orders to forecast demand, or Netflix personalizes recommendations based on viewing history, it’s powered by a data warehouse.

A data warehouse is a specialized system designed to ingest vast amounts of historical data from various sources and optimize it for complex queries, reporting, and business intelligence (BI).

In this chapter, we will demystify data warehousing, covering its architecture, core concepts, and how modern cloud platforms have revolutionized the field.

1. What is a Data Warehouse