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» Containment of Aggregate Queries

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FOIKS
2004
Springer

130views Information Technology» more FOIKS 2004»

Query Answering and Containment for Regular Path Queries under Distortions

14 years 25 days ago

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Abstract. We give a general framework for approximate query processing in semistructured databases. We focus on regular path queries, which are the integral part of most of the que...

Gösta Grahne, Alex Thomo

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TKDE
2012

487views Formal Methods» more TKDE 2012»

Query Planning for Continuous Aggregation Queries over a Network of Data Aggregators

11 years 9 months ago

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—Continuous queries are used to monitor changes to time varying data and to provide results useful for online decision making. Typically a user desires to obtain the value of som...

Rajeev Gupta, Krithi Ramamritham

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DBPL
2001
Springer

102views Database» more DBPL 2001»

View-Based Query Answering and Query Containment over Semistructured Data

13 years 12 months ago

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Diego Calvanese, Giuseppe De Giacomo, Maurizio Len...

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