140 search results - page 16 / 28 » RDF Aggregate Queries and Views |
SIGMOD
1996
ACM
14 years 1 months ago
1996
ACM
Decision support applications involve complex queries on very large databases. Since response times should be small, query optimization is critical. Users typically view the data ...
SIGMOD
2011
ACM
12 years 11 months ago
2011
ACM
We study the problem of context-sensitive ranking for document retrieval, where a context is defined as a sub-collection of documents, and is specified by queries provided by do...
VLDB
1999
ACM
14 years 1 months ago
1999
ACM
On-Line Analytical Processing (OLAP) based on a dimensional view of data is being used increasingly for the purpose of analyzing very large amounts of data. To improve query perfo...
ICDE
2006
IEEE
14 years 10 months ago
2006
IEEE
We consider the problem of creating a sample view of a database table. A sample view is an indexed, materialized view that permits efficient sampling from an arbitrary range query...
DAWAK
2000
Springer
14 years 1 months ago
2000
Springer
In the context of multidimensional databases implemented on relational DBMSs through star schemes, the most effective technique to enhance performances consists of materializing re...