A data warehouse is the multitiered computer storehouse of current and historical data.

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A data warehouse is a specialized database designed for querying and analysis of data. It is structured in a way that allows for efficient data retrieval, analysis, and reporting, and is typically used as a central repository for historical and current data from multiple sources. The data in a data warehouse is organized into multiple tiers or layers, such as the extraction, transformation, and loading (ETL) layer, the data storage layer, and the presentation layer.

A Data Warehouse Is the Multitiered Computer Storehouse of Current