Maintaining Horizontally Partitioned Warehouse Views

Data warehouses usually store large amounts of information, representing an integration of base data from different data sources over a long time period. Aggregate views can be stored as a set of its horizontal fragments for the purposes of reducing warehouse query response time and maintenance cost.This paper proposes a scheme that efficiently maintains horizontally partitioned data warehouse views. Using the proposed scheme, only one view fragment holding the relevant subset of tuples of the view is accessed for each update. The scheme also includes an approach to reduce the refresh time for maintaining views that compute aggregate functions MIN and MAX.