2217 search results - page 262 / 444 » Rank-aware Query Optimization |
190
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WAIM
2004
Springer
15 years 11 months ago
2004
Springer
Selectivity estimation of path expressions in querying XML data plays an important role in query optimization. A path expression may contain multiple branches with predicates, each...
184
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SSDBM
2003
IEEE
15 years 11 months ago
2003
IEEE
In many application contexts, like statistical databases, scientific databases, query optimizers, OLAP, and so on, data are often summarized into synopses of aggregate values. Su...
156
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COCOON
2003
Springer
15 years 11 months ago
2003
Springer
We design efficient competitive algorithms for discovering hidden information using few queries. Specifically, consider a game in a given set of intervals (and their implied inte...
165
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SIGMOD
1999
ACM
15 years 10 months ago
1999
ACM
The database query optimizer requires the estimation of the query selectivity to find the most efficient access plan. For queries referencing multiple attributes from the same rel...
163
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PVLDB
2008
15 years 5 months ago
2008
OLAP servers based on relational backends typically exploit materialized aggregate tables to improve response times of complex analytical queries. One of the key problems in this ...