511 search results - page 39 / 103 » Approximate Selection Queries over Imprecise Data |
157
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EDBT
2000
ACM
15 years 9 months ago
2000
ACM
OLAP applications use precomputation of aggregate data to improve query response time. While this problem has been well-studied in the recent database literature, to our knowledge ...
155
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XSYM
2004
Springer
15 years 11 months ago
2004
Springer
A key step in the optimization of declarative queries over XML data is estimating the selectivity of path expressions, i.e., the number of elements reached by a specific navigatio...
174
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ICDE
2010
IEEE
16 years 5 months ago
2010
IEEE
K Nearest Neighbor search has many applications including data mining, multi-media, image processing, and monitoring moving objects. In this paper, we study the problem of KNN over...
190
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ADC
2010
Springer
15 years 1 months ago
2010
Springer
Aggregation against distinct objects has been involved in many real applications with the presence of duplicates, including real-time monitoring moving objects. In this paper, we ...
177
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ADC
2003
Springer
15 years 11 months ago
2003
Springer
Selectivity estimation of queries not only provides useful information to the query processing optimization but also may give users a preview of processing results. In this paper,...