243 search results - page 35 / 49 » Selectivity Estimation for Boolean Queries |
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JACM
2012
13 years 17 hour ago
2012
A fundamental problem in data management is to draw and maintain a sample of a large data set, for approximate query answering, selectivity estimation, and query planning. With la...
SIGMOD
2004
ACM
15 years 9 months ago
2004
ACM
The rich dependency structure found in the columns of real-world relational databases can be exploited to great advantage, but can also cause query optimizers--which usually assum...
DASFAA
2004
IEEE
15 years 1 months ago
2004
IEEE
A meta-search engine propagates user queries to its participant search engines following a server selection strategy. To facilitate server selection, the metasearch engine must ke...
CAISE
2003
Springer
15 years 2 months ago
2003
Springer
In a selective information dissemination (SDI) system, users submit profiles consisting of a number of long-standing queries to represent their information needs. The system then c...
ICDE
2010
IEEE
15 years 2 months ago
2010
IEEE
— When a database system is extended with the skyline operator, it is important to determine the most efficient way to execute a skyline query across tables with join operations...