2724 search results - page 191 / 545 » Optimizing Queries on Files |
156
Voted
RR
2007
Springer
15 years 9 months ago
2007
Springer
For the foreseeable future, most data will continue to be stored in relational databases. To work with these data in ontology-based applications, tools and techniques that bridge t...
175
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STOC
2012
ACM
13 years 6 months ago
2012
ACM
We consider submodular optimization problems, and provide a general way of translating oracle inapproximability results arising from the symmetry gap technique to computational co...
133
Voted
SIGMOD
2004
ACM
16 years 3 months ago
2004
ACM
Exploratory ad-hoc queries could return too many answers ? a phenomenon commonly referred to as "information overload". In this paper, we propose to automatically catego...
142
Voted
PPAM
2005
Springer
15 years 9 months ago
2005
Springer
Abstract. In this paper we deal with the problem of finding an optimal query execution plan in database systems. We improve the analysis of a polynomial-time approximation algorit...
113
Voted
ERSHOV
2006
Springer
15 years 7 months ago
2006
Springer
In this work, we present a semantic query optimization technique to improve the efficiency of the evaluation of a subset of SQL:1999 recursive queries. Using datalog notation, we c...