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Systems and methods for mapping and propagating a source dataset to a plurality of target tables in a target database are described herein. Embodiments include a physical database design with a template-based loader, and a method to propagate changes in the source dataset to a target database. Other embodiments include a database physical design with a plurality of small fact and summary tables. Still other embodiments include a method of extracting and loading data automatically into a target database, while simultaneously maintaining current summary tables.