3652 search results - page 67 / 731 » A study of query length |
ICDE
2007
IEEE
14 years 9 months ago
2007
IEEE
Optimizing nested queries is an intricate problem. It becomes even harder if in a nested query the linking predicate or the correlation predicate occurs disjunctively. We present ...
PODS
2001
ACM
14 years 8 months ago
2001
ACM
The need to search for complex and recurring patterns in database sequences is shared by many applications. In this paper, we discuss how to express and support efficiently sophis...
ICDT
2007
ACM
14 years 2 months ago
2007
ACM
Abstract. We study containment of conjunctive queries that are evaluated over databases that may contain tuples with null values. We assume the semantics of SQL for single block qu...
MDM
2010
Springer
14 years 18 days ago
2010
Springer
—Range query processing is an important technology in spatial databases. Current studies mainly focus on range queries in outdoor space based on the Euclidean or network distance...
VLDB
1999
ACM
14 years 2 days ago
1999
ACM
The problem of nding the best answers to a query quickly, rather than nding all answers, is of increasing importance as relational databases are applied in multimedia and decision...