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» Aggregates in Possibilistic Databases
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VLDB
1999
ACM
174views Database» more  VLDB 1999»
14 years 2 months ago
Extending Practical Pre-Aggregation in On-Line Analytical Processing
On-Line Analytical Processing (OLAP) based on a dimensional view of data is being used increasingly for the purpose of analyzing very large amounts of data. To improve query perfo...
Torben Bach Pedersen, Christian S. Jensen, Curtis ...
ER
2010
Springer
129views Database» more  ER 2010»
13 years 8 months ago
Specifying Aggregation Functions in Multidimensional Models with OCL
Multidimensional models are at the core of data warehouse systems, since they allow decision makers to early define the relevant information and queries that are required to satis...
Jordi Cabot, Jose-Norberto Mazón, Jes&uacut...
ICDE
2008
IEEE
188views Database» more  ICDE 2008»
14 years 11 months ago
Efficient Aggregate Computation over Data Streams
Abstract-- Cisco's NetFlow Collector (NFC) is a powerful example of a real-world product that supports multiple aggregate queries over a continuous stream of IP flow records. ...
Kanthi Nagaraj, K. V. M. Naidu, Rajeev Rastogi, Sc...
ICDE
2006
IEEE
150views Database» more  ICDE 2006»
14 years 11 months ago
Efficient Aggregation of Ranked Inputs
A top-k query combines different rankings of the same set of objects and returns the k objects with the highest combined score according to an aggregate function. We bring to ligh...
Nikos Mamoulis, Kit Hung Cheng, Man Lung Yiu, Davi...
ICDE
2002
IEEE
117views Database» more  ICDE 2002»
14 years 11 months ago
Exploring Aggregate Effect with Weighted Transcoding Graphs for Efficient Cache Replacement in Transcoding Proxies
This paper explores the aggregate effect when caching multiple versions of the same Web object in the transcoding proxy. Explicitly, the aggregate profit from caching multiple ver...
Cheng-Yue Chang, Ming-Syan Chen