The main function of a data warehouse is to consolidate and store large volumes of data from various sources to support business intelligence (BI) and analytical processes. A data warehouse is designed to provide a unified, stable environment allowing users to perform complex queries and analysis efficiently. By enabling organizations to organize historical and current data, it aids in decision-making, trend analysis, and reporting. This structured repository also ensures data quality and consistency, making it an essential tool for effective data-driven management.