785 search results - page 92 / 157 » Efficient Processing of Top-k Queries in Uncertain Databases |
147
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PVLDB
2008
15 years 4 months ago
2008
Estimates of predicate selectivities by database query optimizers often differ significantly from those actually encountered during query execution, leading to poor plan choices a...
146
Voted
SIGMOD
2002
ACM
16 years 4 months ago
2002
ACM
The emergence of the Web has increased interests in XML data. XML query languages such as XQuery and XPath use label paths to traverse the irregularly structured data. Without a s...
142
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PODS
1999
ACM
15 years 9 months ago
1999
ACM
One of the most important types of query processing in spatial databases and geographic information systems is the spatial join, an operation that selects, from two relations, all...
140
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ADBIS
2000
Springer
15 years 9 months ago
2000
Springer
We consider queries which originate from a mobile unit and whose result depends on the location of the user who initiates the query. Example of such a query is How many people are ...
179
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EDBT
2009
ACM
15 years 2 months ago
2009
ACM
Data Stream Management Systems (DSMS) operate under strict performance requirements. Key to meeting such requirements is to efficiently handle time-critical tasks such as managing...