66 search results - page 11 / 14 » Improved Histograms for Selectivity Estimation of Range Pred... |
VLDB
2001
ACM
15 years 4 months ago
2001
ACM
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...
HPDC
2005
IEEE
15 years 5 months ago
2005
IEEE
This paper examines how computation can be mapped across the nodes of a distributed search system to effectively utilize available resources. We specifically address computationa...
84
Voted
VLDB
1997
ACM
15 years 3 months ago
1997
ACM
Data is often stored in summarized form, as a histogram of aggregates (COUNTs, SUMs, or AVeraGes) over speci ed ranges. We study how to estimate the original detail data from the ...
109
click to vote
VTC
2006
IEEE
15 years 5 months ago
2006
IEEE
— Wireless local area networks offer a range of transmitted data rates that are to be selected according to estimated channel conditions. However, due to packet overheads and con...
113
click to vote
JIIS
2006
14 years 11 months ago
2006
A join of two relations in real databases is usually much smaller than their cartesian product. This means that most of the combinations of tuples in the crossproduct of the respe...