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» Aggregate queries in peer-to-peer OLAP
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SSDBM
1999
IEEE
108views Database» more  SSDBM 1999»
14 years 2 months ago
Supporting Imprecision in Multidimensional Databases Using Granularities
On-Line Analytical Processing (OLAP) technologies are being used widely, but the lack of effective means of handling data imprecision, which occurs when exact values are not known...
Torben Bach Pedersen, Christian S. Jensen, Curtis ...
ICDT
2009
ACM
105views Database» more  ICDT 2009»
14 years 10 months ago
Efficient data structures for range-aggregate queries on trees
Graph-theoretic aggregation problems have been considered both in OLAP (grid graph) and XML (tree). This paper gives new results for MIN aggregation in a tree, where we want the M...
Hao Yuan, Mikhail J. Atallah
EDBT
2002
ACM
141views Database» more  EDBT 2002»
14 years 10 months ago
Efficient OLAP Query Processing in Distributed Data Warehouses
Abstract. The success of Internet applications has led to an explosive growth in the demand for bandwidth from ISPs. Managing an IP network requires collecting and analyzing networ...
Michael O. Akinde, Michael H. Böhlen, Theodor...
TKDE
2002
148views more  TKDE 2002»
13 years 9 months ago
Parallel Star Join + DataIndexes: Efficient Query Processing in Data Warehouses and OLAP
On-Line Analytical Processing (OLAP) refers to the technologies that allow users to efficiently retrieve data from the data warehouse for decision-support purposes. Data warehouses...
Anindya Datta, Debra E. VanderMeer, Krithi Ramamri...
ICDE
2003
IEEE
148views Database» more  ICDE 2003»
14 years 11 months ago
Efficient Computation of Subqueries in Complex OLAP
Expressing complex OLAP queries using group-by, aggregation, and joins can be extremely difficult. As a result of this, many alternate ways of expressing such queries have been de...
Michael H. Böhlen, Michael O. Akinde