Data Migration
A data warehouse (DW) is a collection of data extracted from the operational or transactional system in a business, transformed to clean up inconsistencies, and then arranged to support rapid analysis and/or reporting.
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Data Migration
Star schema is the simplest and most common database modelling structure used in traditional data warehouse paradigms. The schema resembles a constellation of stars — generally several bright stars (facts) surrounded by dimmer ones (dimensions) where one or more fact tables reference different dimension tables.
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