588 search results - page 16 / 118 » Positive higher-order queries |
104
Voted
CORR
2011
Springer
14 years 5 months ago
2011
Springer
The annotation of the results of database transformations was shown to be very effective for various applications. Until recently, most works in this context focused on positive q...
230
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ICDE
2008
IEEE
16 years 3 months ago
2008
IEEE
This paper introduces U-relations, a succinct and purely relational representation system for uncertain databases. U-relations support attribute-level uncertainty using vertical pa...
121
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PODS
2004
ACM
16 years 1 months ago
2004
ACM
Unions of conjunctive queries, also known as select-project-join-union queries, are the most frequently asked queries in relational database systems. These queries are definable b...
IPL
2008
15 years 1 months ago
2008
Abstract. In this paper, we study a restricted version of the position restricted pattern matching problem introduced and studied M
202
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ICDE
2007
IEEE
16 years 3 months ago
2007
IEEE
Position updates and query re-evaluations are two predominant, costly components of processing location-based, continual queries (CQs) in mobile systems. To obtain high-quality qu...