91 search results - page 4 / 19 » Aggregate Operators in Constraint Query Languages |
ICCSA
2007
Springer
14 years 1 months ago
2007
Springer
Information aggregation is an important operation in wireless sensor networks executed for the purpose of monitoring and reporting of the environmental data. Due to the performance...
DBPL
1999
Springer
13 years 11 months ago
1999
Springer
Linear constraint databases and query languages are appropriate for spatial database applications. Not only the data model is natural to represent a large portion of spatial data s...
VLDB
2004
ACM
14 years 23 days ago
2004
ACM
We study the fundamental limitations of relational algebra (RA) and SQL in supporting sequence and stream queries, and present effective query language and data model enrichments ...
FLOPS
2010
Springer
14 years 2 months ago
2010
Springer
We present a general framework for generating SQL query test cases using Constraint Logic Programming. Given a database schema and a SQL view defined in terms of other views and s...
SAC
2006
ACM
14 years 1 months ago
2006
ACM
In the paper we describe the problem of grouping and aggregation in the concept-oriented data model. The model is based on ordering its elements within a hierarchical multidimensi...