1500 search results - page 155 / 300 » Query Optimization in Database Grid |
SIGMOD
2004
ACM
14 years 9 months ago
2004
ACM
Spatial Database Management Systems (SDBMS), e.g., Geographical Information Systems, that manage spatial objects such as points, lines, and hyper-rectangles, often have very high ...
SIGMOD
1998
ACM
14 years 1 months ago
1998
ACM
Remote data access from disparate sources across a widearea network such as the Internet is problematic due to the unpredictable nature of the communications medium and the lack o...
VLDB
1995
ACM
14 years 21 days ago
1995
ACM
Efficient processing of aggregation queries is essential for decision support applications. This paper describes a class of query transformations, called eager aggregation and lat...
PPAM
2005
Springer
14 years 2 months ago
2005
Springer
Abstract. In this paper we deal with the problem of finding an optimal query execution plan in database systems. We improve the analysis of a polynomial-time approximation algorit...
ERSHOV
2006
Springer
14 years 25 days ago
2006
Springer
In this work, we present a semantic query optimization technique to improve the efficiency of the evaluation of a subset of SQL:1999 recursive queries. Using datalog notation, we c...