605 search results - page 4 / 121 » Aggregate Functions in DLV |
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
Existing SQL aggregate functions present important limitations to compute percentages. This article proposes two SQL aggregate functions to compute percentages addressing such lim...
DBA
2004
13 years 8 months ago
2004
We argue for a new aggregate function we termed the LIST function. It aggregates a set of values of one or more attributes into a single value that is internally a list of these v...
PERCOM
2006
ACM
14 years 7 months ago
2006
ACM
In this paper, we propose a new model of resilient data aggregation in sensor networks, where the aggregator analyzes the received sensor readings and tries to detect unexpected d...
ICLP
2007
Springer
14 years 1 months ago
2007
Springer
This paper describes the dlvhex SPARQL plugin, a query processor for the upcoming Semantic Web query language standard by W3C. We report on the implementation of this languages usi...
TC
2011
13 years 2 months ago
2011
— Processing the gathered information efficiently is a key functionality for wireless sensor networks. In this article, we study the time complexity, message complexity (number ...