1000 search results - page 165 / 200 » Provenance for Aggregate Queries |
IDEAS
2000
IEEE
14 years 2 months ago
2000
IEEE
Most operations of the relational algebra or SQL - like projection with duplicate elimination, join, ordering, group by and aggregations - are efficiently processed using a sorted...
WIDM
1999
ACM
14 years 2 months ago
1999
ACM
Recent work on information integration has yielded novel and efficient solutions for gathering data from the World Wide Web. However, there has been little attention given to the ...
ICDT
1997
ACM
14 years 2 months ago
1997
ACM
Abstract. The goal of this paper is to study tractable iteration mechanisms for bags. The presence of duplicates in bags prevents iteration mechanisms developed in the context of s...
ESWS
2006
Springer
14 years 1 months ago
2006
Springer
The Semantic Web (SW) offers an opportunity to develop novel, sophisticated forms of question answering (QA). Specifically, the availability of distributed semantic markup on a lar...
ASIACRYPT
2008
Springer
13 years 12 months ago
2008
Springer
In a proof-of-retrievability system, a data storage center must prove to a verifier that he is actually storing all of a client's data. The central challenge is to build syst...