320 search results - page 34 / 64 » A Theory of Spatio-Temporal Database Queries |
PODS
2011
ACM
12 years 10 months ago
2011
ACM
Database queries can be broadly classified into two categories: reporting queries and aggregation queries. The former retrieves a collection of records from the database that mat...
PODS
2008
ACM
14 years 7 months ago
2008
ACM
A survey of effective characterizations of tree logics. If L is a logic, then an effective characterization for L is an algorithm, which inputs a tree automaton and replies if the...
CORR
2010
Springer
13 years 7 months ago
2010
Springer
Time is one of the most difficult aspects to handle in real world applications such as database systems. Relational database management systems proposed by Codd offer very little ...
DLOG
2008
13 years 10 months ago
2008
Answering queries posed over knowledge bases is a central problem in knowledge representation and database theory. In databases, query containment is one of the important query op...
ICDT
2005
ACM
14 years 1 months ago
2005
ACM
We study the problem of rewriting queries using views in the presence of access patterns, integrity constraints, disjunction, and negation. We provide asymptotically optimal algori...