205 search results - page 22 / 41 » Optimizing Multiple Top-K Queries over Joins |
VLDB
2004
ACM
14 years 1 months ago
2004
ACM
An increasing percentage of the data needed by business applications is being generated in XML format. Storing the XML in its native format will facilitate new applications that e...
SSDBM
2008
IEEE
14 years 2 months ago
2008
IEEE
Random sampling is a popular technique for providing fast approximate query answers, especially in data warehouse environments. Compared to other types of synopses, random sampling...
SIGMOD
2003
ACM
14 years 7 months ago
2003
ACM
With the growing importance of XML in data exchange, much research has been done in providing flexible query facilities to extract data from structured XML documents. In this pape...
VLDB
2002
ACM
14 years 7 months ago
2002
ACM
The view selection problem is to choose a set of views to materialize over a database schema, such that the cost of evaluating a set of workload queries is minimized and such that ...
ICDE
2010
IEEE
14 years 4 months ago
2010
IEEE
— Many applications require sorting a table over multiple sort orders: generation of multiple reports from a table, evaluation of a complex query that involves multiple instances...