Data mart

A data mart is a specialized version of a data warehouse. Like data warehouses, data marts contain a snapshot of operational Data that helps businesspeople to strategize based on analyses of past trends and experiences. The key difference is that the creation of a data mart is predicated on a specific, predefined need for a certain grouping and configuration of select Data. Since data mart configuration emphasizes easy access to relevant information, the star schema is a fairly popular design choice, as it enables a relational database to emulate the analytical functionality of a multidimensional database.

A dependent data mart is a logical subset (View_(database)) or a physical subset (extract) of a larger data warehouse, isolated for one of the following reasons:

*A need for a special *Performance: to offload the data mart to a separate computer for greater efficiency *Security: to separate an authorized data subset selectively