8763 search results - page 126 / 1753 » Querying Database Knowledge |
154
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VLDB
1997
ACM
15 years 8 months ago
1997
ACM
In semistructured databases there is no schema fixed in advance. To provide the benefits of a schema in such environments, we introduce DataGuides: concise and accurate structural...
137
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PVLDB
2010
15 years 2 months ago
2010
The need to improve a suboptimal execution plan picked by the query optimizer for a repeatedly run SQL query arises routinely. Complex expressions, skewed or correlated data, and ...
115
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ICDT
2007
ACM
15 years 10 months ago
2007
ACM
We introduce a new abstract model of database query processing, finite cursor machines, that incorporates certain data streaming aspects. The model describes quite faithfully what...
138
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VDB
2000
15 years 5 months ago
2000
In this paper we propose a visual interface for the specification of predicates to be used in queries on spatio-temporal databases. The approach is based on a visual specification ...