How are data marts different from data warehouses?

Data marts are stand$-$alone, departmental data systems, while data warehouses are an integrated, enterprise$-$level system.

Data marts focus on an individual department or business function and manage less data than a data warehouse.

Data marts contribute to an organization's data warehouse by supplying the data from one department or function.

Data marts combine data from an organization's data warehouse with new data obtained from other sources.