Main Page | See live article | Alphabetical index A data mart is a computer system used for decision support. It consists of a database of subject area-specific information, along with processes to keep that data updated, processes to purge older or obsolete data, and sets of programs to summarize and query that data. This article is a stub. You can help Wikipedia by fixing it. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.