315 search results - page 49 / 63 » An Overview of Query Optimization in Relational Systems |
ICTIR
2009
Springer
13 years 5 months ago
2009
Springer
Abstract. A useful ability for search engines is to be able to rank objects with novelty and diversity: the top k documents retrieved should cover possible interpretations of a que...
VLDB
2004
ACM
14 years 25 days ago
2004
ACM
The use of inaccurate or outdated database statistics by the query optimizer in a relational DBMS often results in a poor choice of query execution plans and hence unacceptably lo...
EDBT
2012
ACM
11 years 10 months ago
2012
ACM
In this paper we consider the problem of answering queries using views, with or without ontological constraints, which is important for data integration, query optimization, and d...
BTW
2009
Springer
13 years 10 months ago
2009
Springer
Today, more and more enterprises process XML data, many of them already in XML database systems. Once systems start to grow in size, scalability becomes an issue. One of the core o...
VLDB
2002
ACM
14 years 7 months ago
2002
ACM
Abstract. Several alternatives to manage large XML document collections exist, ranging from file systems over relational or other database systems to specifically tailored XML base...