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PVLDB
2008
127views more  PVLDB 2008»
13 years 3 months ago
Hashed samples: selectivity estimators for set similarity selection queries
We study selectivity estimation techniques for set similarity queries. A wide variety of similarity measures for sets have been proposed in the past. In this work we concentrate o...
Marios Hadjieleftheriou, Xiaohui Yu, Nick Koudas, ...
EDBT
2009
ACM
127views Database» more  EDBT 2009»
13 years 11 months ago
Approximate substring selectivity estimation
We study the problem of estimating selectivity of approximate substring queries. Its importance in databases is ever increasing as more and more data are input by users and are in...
Hongrae Lee, Raymond T. Ng, Kyuseok Shim
CSDA
2007
152views more  CSDA 2007»
13 years 4 months ago
Robust variable selection using least angle regression and elemental set sampling
In this paper we address the problem of selecting variables or features in a regression model in the presence of both additive (vertical) and leverage outliers. Since variable sel...
Lauren McCann, Roy E. Welsch
VLDB
2005
ACM
118views Database» more  VLDB 2005»
13 years 10 months ago
Selectivity Estimation for Fuzzy String Predicates in Large Data Sets
Many database applications have the emerging need to support fuzzy queries that ask for strings that are similar to a given string, such as “name similar to smith” and “tele...
Liang Jin, Chen Li
PODS
2000
ACM
179views Database» more  PODS 2000»
13 years 8 months ago
Selectivity Estimation for Boolean Queries
In a variety of applications ranging from optimizing queries on alphanumeric attributes to providing approximate counts of documents containing several query terms, there is an in...
Zhiyuan Chen, Flip Korn, Nick Koudas, S. Muthukris...