298 search results - page 5 / 60 » Query Rewriting in DL-Lite_^(HN)_horn |
EDBT
2006
ACM
15 years 11 months ago
2006
ACM
The problem of rewriting queries using views has received significant attention because of its applications in a wide variety of datamanagement problems. For select-project-join SQ...
122
click to vote
AMW
2010
14 years 10 months ago
2010
SPARQL currently does not include any form of nested queries. In this paper we present a proposal to incorporate nested queries into SPARQL along the design philosophy of SQL neste...
SIGMOD
2001
ACM
15 years 11 months ago
2001
ACM
We study the problem of generating e cient, equivalent rewritings using views to compute the answer to a query. We take the closed-world assumption, in which views are materialize...
106
click to vote
ADBIS
2000
Springer
15 years 3 months ago
2000
Springer
Queries involving aggregation are typical in a number of database research areas, such as data warehousing, global information systems and mobile computing. One of the main ideas ...
ICMCS
2006
IEEE
15 years 5 months ago
2006
IEEE
A visual query is based on pictorial representation of conceptual entities and operations. One of the most important features used in visual queries is the shape. Despite its intu...