1588 search results - page 32 / 318 » Consistent query answering in databases |
130
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DOLAP
2009
ACM
15 years 10 months ago
2009
ACM
In this paper, we investigate the problem of answering top-k queries via materialized views. We provide theoretical guarantees for the adequacy of a view to answer a top-k query, ...
145
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ICDT
2010
ACM
15 years 8 months ago
2010
ACM
In XML data exchange, a schema mapping specifies rules for restructuring a source document under the target schema, and queries over the target document must be answered in a way...
240
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ICDE
2000
IEEE
16 years 5 months ago
2000
IEEE
In information-integration systems, sources may have diverse and limited query capabilities. In this paper we show that because sources have restrictions on retrieving their infor...
250
Voted
ICDE
2008
IEEE
16 years 5 months ago
2008
IEEE
We study new hierarchical indexing approach to process XPATH queries. Here, a hierarchical index consists of index entries that are pairs of queries and their (full/partial) answer...
113
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EDBTW
2006
Springer
15 years 7 months ago
2006
Springer
Users without knowledge of schemas or structured query languages have difficulties in accessing information stored in databases. Commercial and research efforts have focused on key...