197 search results - page 16 / 40 » Identifying relevant constraints for semantic query optimiza... |
TCS
1998
13 years 7 months ago
1998
We introduce a new constraint domain, aggregation constraints, that is useful in database query languages, and in constraint logic programming languages that incorporate aggregate...
SEMWEB
2005
Springer
14 years 1 months ago
2005
Springer
Situation awareness involves the identification and monitoring of relationships among objects participating in an evolving situation. This problem in general is intractable (i.e.,...
SIGECOM
2006
ACM
14 years 1 months ago
2006
ACM
We investigate the space of two-sided multiattribute auctions, focusing on the relationship between constraints on the offers traders can express through bids, and the resulting c...
DBPL
2001
Springer
14 years 1 days ago
2001
Springer
Abstract. We address a fundamental question concerning spatio-temporal database systems: “What are exactly spatio-temporal queries?” We define spatio-temporal queries to be co...
APWEB
2004
Springer
14 years 28 days ago
2004
Springer
Queries to data warehouses often involve hundreds of complex aggregations over large volumes of data, and so it is infeasible to compute these queries by scanning the data sources ...