620 search results - page 8 / 124 » Algorithms for Rewriting Aggregate Queries Using Views |
111
click to vote
SIGMOD
2011
ACM
14 years 2 months ago
2011
ACM
In this paper we consider the problem of answering queries using views, which is important for data integration, query optimization, and data warehouses. We consider its simplest ...
DEXAW
1998
IEEE
15 years 4 months ago
1998
IEEE
Materialized views offer opportunities for significant performance gain in query evaluation by providing fast access to pre-computed data. The question of when and how to use a ma...
ADBIS
2004
Springer
15 years 5 months ago
2004
Springer
Abstract. Query rewriting method is proposed for the heterogeneous information integration infrastructure formed by the subject mediator environment. Local as View (LAV) approach t...
SIGMOD
1998
ACM
15 years 3 months ago
1998
ACM
The Relational On-Line Analytical Processing (ROLAP) is emerging as thedominant approach in data warehousing with decision support applications. In order to enhance query performa...
209
click to vote
ICDE
2007
IEEE
16 years 1 months ago
2007
IEEE
We study the problem of answering queries posed on virtual views of XML documents, a problem commonly encountered when enforcing XML access control and integrating data. We approa...