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» Answering Queries using Humans, Algorithms and Databases
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SIGMOD
1997
ACM
107views Database» more  SIGMOD 1997»
15 years 6 months ago
Range Queries in OLAP Data Cubes
A range query applies an aggregation operation over all selected cells of an OLAP data cube where the selection is speci ed by providing ranges of values for numeric dimensions. W...
Ching-Tien Ho, Rakesh Agrawal, Nimrod Megiddo, Ram...
PODS
2004
ACM
120views Database» more  PODS 2004»
16 years 1 months ago
Locally Consistent Transformations and Query Answering in Data Exchange
Data exchange is the problem of taking data structured under a source schema and creating an instance of a target schema. Given a source instance, there may be many solutions ? ta...
Marcelo Arenas, Pablo Barceló, Ronald Fagin...
W2GIS
2009
Springer
15 years 8 months ago
Database and Representation Issues in Geographic Information Systems (GIS)
Abstract. A review is provided of some database and representation issues involved in the implementation of geographic information systems (GIS). The increasing popularity of web-b...
Hanan Samet
ICDE
2007
IEEE
137views Database» more  ICDE 2007»
16 years 3 months ago
SAO: A Stream Index for Answering Linear Optimization Queries
Linear optimization queries retrieve the top-K tuples in a sliding window of a data stream that maximize/minimize the linearly weighted sums of certain attribute values. To effici...
Gang Luo, Kun-Lung Wu, Philip S. Yu
ICDE
2008
IEEE
137views Database» more  ICDE 2008»
16 years 3 months ago
Multiple Materialized View Selection for XPath Query Rewriting
We study the problem of answering XPATH queries using multiple materialized views. Despite the efforts on answering queries using single materialized view, answering queries using ...
Byron Choi, Jeffrey Xu Yu, Kam-Fai Wong, M. Tamer ...