| definition | Central repository for all or significant parts of the data that an organisation’s various business systems collect, containing harmonised, highly-structured, quality data integrated from multiple sources. Data warehousing emphasises the capture of data from diverse sources for useful analysis and access, but does not generally start from the point-of-view of the end user who may need access to specialised data marts. There are two approaches to data warehousing: The top-down approach spins off data marts for specific groups of users after the complete data warehouse has been created. The bottom-up approach builds the data marts first and then combines them into a single, all-encompassing data warehouse. | ||||||
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| editorial note | Expert review decision, 2021-22: Edit | ||||||
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