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- W2030239461 abstract "In this paper, we focus on the horizontal fragmentation of data warehouses. Our main contribution is the proposal of the MHF-DHA algorithm, which is aimed at improving the performance of drill-down and roll-up queries by horizontally fragmenting data warehouses organized in different levels of aggregation. Besides allowing that multiple dimensions be used as a basis for the fragmentation, the algorithm also explores the hierarchical structure of these dimensions. The performance tests carried out using the TPC-H benchmark showed that the proposed fragmentation provides a huge improvement on the query performance, with a reduction in elapsed time and disk accesses between 71% and 99%." @default.
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- W2030239461 date "2007-03-11" @default.
- W2030239461 modified "2023-09-27" @default.
- W2030239461 title "Horizontal fragmentation as a technique to improve the performance of drill-down and roll-up queries" @default.
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- W2030239461 doi "https://doi.org/10.1145/1244002.1244117" @default.
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