7607 search results - page 34 / 1522 » Querying data provenance |
ICDT
2009
ACM
14 years 8 months ago
2009
ACM
We study containment and equivalence of (unions of) conjunctive queries on relations annotated with elements of a commutative semiring. Such relations and the semantics of positiv...
ICDE
2006
IEEE
14 years 8 months ago
2006
IEEE
Wireless sensor networks are proving to be useful in a variety of settings. A core challenge in these networks is to minimize energy consumption. Prior database research has propo...
SIGMOD
2010
ACM
13 years 5 months ago
2010
ACM
One useful feature that is missing from today’s database systems is an explain capability that enables users to seek clarifications on unexpected query results. There are two t...
VLDB
2004
ACM
14 years 21 days ago
2004
ACM
We present an annotation management system for relational databases. In this system, every piece of data in a relation is assumed to have zero or more annotations associated with ...
PODS
2002
ACM
14 years 7 months ago
2002
ACM
We study two classes of view update problems in relational databases. We are given a source database S, a monotone query Q, and the view Q(S) generated by the query. The first pro...