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» Inferring Answers to Queries
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PODS
2003
ACM
113views Database» more  PODS 2003»
14 years 10 months ago
Materializing views with minimal size to answer queries
In this paper we study the following problem. Given a database and a set of queries, we want to find, in advance, a set of views that can compute the answers to the queries, such ...
Rada Chirkova, Chen Li
SIGMOD
2000
ACM
161views Database» more  SIGMOD 2000»
14 years 2 months ago
Answering Complex SQL Queries Using Automatic Summary Tables
We investigate the problem of using materialized views to answer SQL queries. We focus on modern decision-support queries, which involve joins, arithmetic operations and other (po...
Markos Zaharioudakis, Roberta Cochrane, George Lap...
EDBT
2002
ACM
125views Database» more  EDBT 2002»
14 years 10 months ago
Estimating Answer Sizes for XML Queries
Abstract. Estimating the sizes of query results, and intermediate results, is crucial to many aspects of query processing. In particular, it is necessary for effective query optimi...
Yuqing Wu, Jignesh M. Patel, H. V. Jagadish
SIGMOD
2011
ACM
179views Database» more  SIGMOD 2011»
13 years 21 days ago
No free lunch in data privacy
Differential privacy is a powerful tool for providing privacypreserving noisy query answers over statistical databases. It guarantees that the distribution of noisy query answers...
Daniel Kifer, Ashwin Machanavajjhala
WAIM
2007
Springer
14 years 4 months ago
CoXML: A Cooperative XML Query Answering System
Abstract. The heterogeneity nature of XML data creates the need for approximate query answering. In this paper, we present an XML system that cooperates with users to provide user-...
Shaorong Liu, Wesley W. Chu