448 search results - page 10 / 90 » Queries and Constraints on Semi-structured Data |
APWEB
2004
Springer
15 years 3 months ago
2004
Springer
Queries to data warehouses often involve hundreds of complex aggregations over large volumes of data, and so it is infeasible to compute these queries by scanning the data sources ...
PODS
2000
ACM
15 years 1 months ago
2000
ACM
The problem of query containment is fundamental to many aspects of database systems, including query optimization, determining independence of queries from updates, and rewriting ...
97
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AICOM
2004
14 years 9 months ago
2004
Abstract. We address the problem of answering queries using expressive symmetric inter-schema constraints which allow to establish mappings between several heterogeneous informatio...
135
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ICDT
1995
ACM
15 years 1 months ago
1995
ACM
Abstract. Extension of the relational database model to represent complex data has been a focus of much research in recent years. At the same time, an alternative extension of the ...
ICDT
2003
ACM
15 years 2 months ago
2003
ACM
We state and solve the query reformulation problem for XML publishing in a general setting that allows mixed (XML and relational) storage for the proprietary data and exploits redu...