2514 search results - page 176 / 503 » On the Computation of Approximations of Database Queries |
183
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VLDB
1995
ACM
15 years 10 months ago
1995
ACM
We address the problem of finding parallel plans for SQL queries using the two-phase approach of join ordering and query rewrite (JOQR) followed by parallelization. We focus on t...
212
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EDBT
2002
ACM
16 years 6 months ago
2002
ACM
Abstract. Estimating the sizes of query results, and intermediate results, is crucial to many aspects of query processing. In particular, it is necessary for effective query optimi...
166
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STOC
2001
ACM
16 years 6 months ago
2001
ACM
Histograms are typically used to approximate data distributions. Histograms and related synopsis structures have been successful in a wide variety of popular database applications...
301
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ICDE
2009
IEEE
16 years 8 months ago
2009
IEEE
Abstract--With the advance of wireless communication technology, it is quite common for people to view maps or get related services from the handheld devices, such as mobile phones...
203
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SIGMOD
2010
ACM
15 years 11 months ago
2010
ACM
In this paper, we propose an online aggregation system called COSMOS (Continuous Sampling for Multiple queries in an Online aggregation System), to process multiple aggregate quer...