Data Warehouse: A Comprehensive Overview This document provides a comprehensive overview of data warehouses , covering their definition, purpose, key characteristics, architecture, benefits, and common use cases. It aims to provide a clear understanding of what a data warehouse is and how it can be leveraged to improve business intelligence and decision-making. A data warehouse is a central repository of integrated data from one or more disparate sources. They are designed to store and analyze historical data to support business intelligence (BI) and reporting activities . Data warehouses are different from operational databases, which are designed to handle real-time transactions. Key Characteristics of a Data Warehouse Subject-Oriented: Data is organized around major subjects of the business, such as customers, products, or sales, rather than operational processes. Integrated: Data from various sources is cleansed, transformed...
