712 search results - page 20 / 143 » Decoupled Query Optimization for Federated Database Systems |
114
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ADBIS
2005
Springer
15 years 7 months ago
2005
Springer
We present a formal analysis of the following view-selection problem: Given a set of queries and a database, return definitions of views that, when materialized in the database, w...
135
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VLDB
2007
ACM
15 years 8 months ago
2007
ACM
Testing a database engine has been and continues to be a challenging task. The space of possible SQL queries along with their possible access paths is practically unbounded. Moreo...
108
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DAWAK
2008
Springer
15 years 3 months ago
2008
Springer
Abstract. Data mining algorithms are often embedded in more complex systems, serving as the provider of data for internal decision making within these systems. In this paper we add...
127
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PODS
2000
ACM
15 years 6 months ago
2000
ACM
The problem of query containment is fundamental to many aspects of database systems, including query optimization, determining independence of queries from updates, and rewriting ...
139
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SIGMOD
2011
ACM
14 years 4 months ago
2011
ACM
An important means of allowing non-expert end-users to pose ad hoc queries — whether over single databases or data integration systems — is through keyword search. Given a set...