Which of the following does NOT describe a data warehouse?
Updateable does NOT describe a data warehouse.
A data warehouse is a relational database that is designed for query and analysis rather than for transaction processing. It usually contains historical data derived from transaction data, but it can include data from other sources.
A data warehouse essentially combines information from several sources into one comprehensive database. For example, in the business world, a data warehouse might incorporate customer information from a company's point-of-sale systems (the cash registers), its website, its mailing lists and its comment cards.
The most popular definition came from Bill Inmon, who provided the following: A data warehouse is a subject-oriented, integrated, time-variant and non-volatile collection of data in support of management's decision making process.