A data mart is a subset of an organizational data store, usually oriented to a specific purpose or major data subject, that may be distributed to support business needs.Data marts are analytical data stores designed to focus on specific business functions for a specific community within an organization. Data marts are often derived from subsets of data in a data warehouse though in the bottom-up data warehouse design methodology the data warehouse is created from the union of organizational data marts.
Reasons for creating a data mart
- Easy access to frequently needed data
- Creates collective view by a group of users
- Improves end-user response time
- Ease of creation
- Lower cost than implementing a full data warehouse
- Potential users are more clearly defined than in a full data warehouse
- R. Kelly Rainer Jr. efraim turban. Introduction to information systems 2nd edition.
- Data mart. Wikipedia the free encyclopedia. Available at http://en.wikipedia.org/wiki/Data_mart
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