2514 search results - page 81 / 503 » On the Computation of Approximations of Database Queries |
168
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ICDT
1999
ACM
15 years 10 months ago
1999
ACM
Abstract. In this paper we present a new approach for studying aggregations in the context of database query languages. Starting from a broad de nition of aggregate function, we ad...
167
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PODS
1999
ACM
15 years 10 months ago
1999
ACM
In this paper we consider the problem of the logical characterization of the notion of consistent answer in a relational database that may violate given integrity constraints. Thi...
191
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SUM
2007
Springer
16 years 14 days ago
2007
Springer
Abstract. We present the Consistency Extractor System (ConsEx) that uses answer set programming to compute consistent answers to first-order queries posed to relational databases ...
157
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DEXA
2000
Springer
15 years 10 months ago
2000
Springer
In 'Associative Caching' each client computer keeps a copy of its query result sets in its own local database. The purpose is to reduce the size and frequency of queries ...
176
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MIS
2001
Springer
15 years 10 months ago
2001
Springer
Multimedia databases deal with storage and retrieval of complex descriptors of image contents, called features. Traditional techniques consider features as “black boxes,” ofte...