What is a data warehouse and what is its purpose? A data warehouse is a technique used for retrieving and integrating data from distributed, autono...

What is a data warehouse and what is its purpose?
A data warehouse is a technique used for retrieving and integrating data from distributed, autonomous, and possibly heterogeneous sources.
Data is stored in a large repository called a data warehouse, which summarizes the data organized into dimensions, making it available for queries and analysis through OLAP applications and decision support systems.
The purpose of a data warehouse is to provide a solid foundation for integrating corporate and historical data for managerial analysis.
The construction and implementation of a data warehouse are done step by step, organizing and storing data from a long-term perspective.
The most complex step in implementing a data warehouse is the loading process, where data from various operational environments must be selected, processed, standardized, and transferred to the new environment, always following the modeling standard used for the data warehouse.