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A data mart is an extract of the data warehouse which is established for separate purposes.

Such purposes may be:

special structure: e.g. OLAP for multidimensional analysis
special content: e.g. reduced parts of a huge data warehouse analogue to an user view
performance: separate handling on separate processional units (computers)
security: opening data for more or other users.

See also: data, data warehouse, OLAP

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Topics: Data Mart, Data Encryption Standard, Data Warehouse...

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