1588 search results - page 107 / 318 » Consistent query answering in databases |
122
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PODS
2006
ACM
16 years 4 months ago
2006
ACM
The query equivalence problem has been studied extensively for set-semantics and, more recently, for bag-set semantics. However, SQL queries often combine set and bag-set semantic...
156
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ISMIS
1994
Springer
15 years 8 months ago
1994
Springer
We assume that safety of information stored in a database depends on the reliability of the agents who have performed the insertions in the database. We present a logic S to repres...
138
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SEMWEB
2009
Springer
15 years 11 months ago
2009
Springer
In this paper, we present PelletSpatial, a qualitative spatial reasoning engine implemented on top of Pellet. PelletSpatial provides consistency checking and query answering over s...
117
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DASFAA
2003
IEEE
15 years 9 months ago
2003
IEEE
Data warehouses are of crucial importance to decision-making in competitive organizations. The fact that they store enormous quantities of data is a challenge in what concerns per...
162
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SIGMOD
2011
ACM
14 years 7 months ago
2011
ACM
In this paper we consider the problem of answering queries using views, which is important for data integration, query optimization, and data warehouses. We consider its simplest ...