50 search results - page 1 / 10 » Conditional Selectivity for Statistics on Query Expressions |
SIGMOD
2004
ACM
14 years 4 months ago
2004
ACM
Cardinality estimation during query optimization relies on simplifying assumptions that usually do not hold in practice. To diminish the impact of inaccurate estimates during opti...
SSDBM
2009
IEEE
13 years 11 months ago
2009
IEEE
Scientific experiments produce large volumes of data represented as complex objects that describe independent events such as particle collisions. Scientific analyses can be express...
PODS
2008
ACM
14 years 4 months ago
2008
ACM
We study complexity and approximation of queries in an expressive query language for probabilistic databases. The language studied supports the compositional use of confidence com...
JIDM
2010
13 years 2 months ago
2010
The need for incorporating preference querying in database technology is a very important issue in a variety of applications ranging from e-commerce to personalized search engines....
BMCBI
2006
13 years 4 months ago
2006
Background: The identification of biologically interesting genes in a temporal expression profiling dataset is challenging and complicated by high levels of experimental noise. Mo...