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» A clustering method that uses lossy aggregation of data
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VLDB
2007
ACM
102views Database» more  VLDB 2007»
14 years 7 months ago
Randomized Algorithms for Data Reconciliation in Wide Area Aggregate Query Processing
Many aspects of the data integration problem have been considered in the literature: how to match schemas across different data sources, how to decide when different records refer...
Fei Xu, Chris Jermaine
DMDW
2000
116views Management» more  DMDW 2000»
13 years 9 months ago
Divide and aggregate: caching multidimensional objects
A common optimization technique in the OLAP application domain is the use of summary aggregate data. For an appropriate support of analysis hot spots, we propose a query based agg...
Wolfgang Lehner, Jens Albrecht, Wolfgang Hümm...
EDBT
2009
ACM
127views Database» more  EDBT 2009»
14 years 2 months ago
Answering aggregate keyword queries on relational databases using minimal group-bys
Keyword search has been recently extended to relational databases to retrieve information from text-rich attributes. However, all the existing methods focus on finding individual...
Bin Zhou 0002, Jian Pei
CVPR
2006
IEEE
14 years 9 months ago
Spectral Methods for Automatic Multiscale Data Clustering
Spectral clustering is a simple yet powerful method for finding structure in data using spectral properties of an associated pairwise similarity matrix. This paper provides new in...
Arik Azran, Zoubin Ghahramani
KDD
1999
ACM
206views Data Mining» more  KDD 1999»
13 years 12 months ago
Compressed Data Cubes for OLAP Aggregate Query Approximation on Continuous Dimensions
Efficiently answering decision support queries is an important problem. Most of the work in this direction has been in the context of the data cube. Queries are efficiently answer...
Jayavel Shanmugasundaram, Usama M. Fayyad, Paul S....