A data mart is a subset of a larger data warehouse that is focused on a specific business function or department.
It is designed to provide quick and easy access to relevant data for analysis and decision-making purposes.
Data marts are often created to meet the specific needs of a particular user group, and can be either dependent or independent from the main data warehouse.
They typically contain summarized, aggregated, and pre-processed data that is optimized for the specific analytical requirements of the user group.