26 search results - page 3 / 6 » Estimating the number of answers with guarantees for structu... |
VLDB
2001
ACM
13 years 12 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...
VLDB
2007
ACM
14 years 1 months ago
2007
ACM
A top-k query retrieves the k highest scoring tuples from a data set with respect to a scoring function defined on the attributes of a tuple. The efficient evaluation of top-k q...
SIGMOD
2010
ACM
13 years 2 months ago
2010
ACM
This demonstration presents Crescando, an implementation of a distributed relational table that guarantees predictable response time on unpredictable workloads. In Crescando, data...
ICDE
2002
IEEE
14 years 8 months ago
2002
IEEE
The goal of a data integration system is to provide a uniform interface to a multitude of data sources. Given a user query formulated in this interface, the system translates it i...
ICDT
2011
ACM
12 years 11 months ago
2011
ACM
Provenance in scientific workflows is a double-edged sword. On the one hand, recording information about the module executions used to produce a data item, as well as the parame...