2217 search results - page 388 / 444 » Rank-aware Query Optimization |
116
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CORR
2008
Springer
15 years 2 months ago
2008
Springer
A purely relational account of the true XQuery semantics can turn any relational database system into an XQuery processor. Compiling nested expressions of the fully compositional X...
124
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TKDE
2008
15 years 2 months ago
2008
We propose a novel approach based on predictive quantization (PQ) for online summarization of multiple time-varying data streams. A synopsis over a sliding window of most recent en...
125
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SIGMOD
1998
ACM
15 years 6 months ago
1998
ACM
Query optimization is an integral part of relational database management systems. One important task in query optimization is selectivity estimation, that is, given a query P, we ...
159
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KRDB
1997
15 years 3 months ago
1997
A data warehouse is a redundant collection of data replicated from several possibly distributed and loosely coupled source databases, organized to answer OLAP queries. Relational ...
105
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SIGMOD
1994
ACM
15 years 6 months ago
1994
ACM
We describe an algorithm for estimating the number of page fetches for a partial or complete scan of a B-tree index. The algorithm obtains estimates for the number of page fetches ...