Data Warehousing

A data warehouse is a relational/multidimensional database that is designed for query and analysis rather than transaction processing. A data warehouse usually contains historical data that is derived from transaction data. It separates analysis workload from transaction workload and enables a business to consolidate data from several sources.

In addition to a relational/multidimensional database, a data warehouse environment often consists of an ETL solution, an OLAP engine, client analysis tools, and other applications that manage the process of gathering data and delivering it to business users.

An enterprise data warehouse provides a central database for decision support throughout the enterprise

ODS (Operational Data Store) has a broad enterprise wide scope, but unlike the real enterprise data warehouse, data is refreshed in near real time and used for routine business activity.

A data mart is generated from the data warehouse and contains data focused on a given subject and data that is frequently accessed or summarized.

DATA WAREHOUSING Business Intelligence
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