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VLDB
2001
ACM
114views Database» more  VLDB 2001»
15 years 1 months ago
Distinct Sampling for Highly-Accurate Answers to Distinct Values Queries and Event Reports
Estimating the number of distinct values is a wellstudied problem, due to its frequent occurrence in queries and its importance in selecting good query plans. Previous work has sh...
Phillip B. Gibbons
78
Voted
CPAIOR
2010
Springer
15 years 1 months ago
The Increasing Nvalue Constraint
This paper introduces the Increasing Nvalue constraint, which restricts the number of distinct values assigned to a sequence of variables so that each variable in the sequence is l...
Nicolas Beldiceanu, Fabien Hermenier, Xavier Lorca...