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BTW
2003
Springer
170views Database» more  BTW 2003»
15 years 5 months ago
Executing Nested Queries
Abstract: Optimization of nested queries, in particular finding equivalent “flattened” queries for queries that employ the SQL sub-query construct, has been researched extensiv...
Goetz Graefe
SIGMOD
2010
ACM
281views Database» more  SIGMOD 2010»
15 years 4 months ago
Continuous sampling for online aggregation over multiple queries
In this paper, we propose an online aggregation system called COSMOS (Continuous Sampling for Multiple queries in an Online aggregation System), to process multiple aggregate quer...
Sai Wu, Beng Chin Ooi, Kian-Lee Tan
MDM
2010
Springer
180views Communications» more  MDM 2010»
15 years 4 months ago
Online Time Interval Top-k Queries in Wireless Sensor Networks
Motivated by many applications, top-k query is a fundamental operation in modern database systems. Technological advances have enabled the deployment of large-scale sensor networks...
Baichen Chen, Weifa Liang, Jeffrey Xu Yu
HT
1997
ACM
15 years 4 months ago
What the Query Told the Link: The Integration of Hypertext and Information Retrieval
Traditionally hypertexts have been limited in size by the manual effort required to create hypertext links. In addition, large hyper–linked collections may overwhelm users with ...
Gene Golovchinsky
SIGMOD
1995
ACM
80views Database» more  SIGMOD 1995»
15 years 3 months ago
Join Queries with External Text Sources: Execution and Optimization Techniques
Text is a pervasive information type, and many applications require querying over text sources in addition to structured data. This paper studies the problem of query processing i...
Surajit Chaudhuri, Umeshwar Dayal, Tak W. Yan