470 search results - page 4 / 94 » Privacy-Preserving Queries over Relational Databases |
SDMW
2009
Springer
14 years 3 months ago
2009
Springer
In this paper we investigate the feasibility and efficiency of mapping XML data and access control policies onto relational and native XML databases for storage and querying. We de...
VLDB
2008
ACM
14 years 8 months ago
2008
ACM
Abstract In this article, we present a comprehensive approach for privacy preserving access control based on the notion of purpose. In our model, purpose information associated wit...
ICDE
2002
IEEE
14 years 10 months ago
2002
IEEE
Internet search engines have popularized the keywordbased search paradigm. While traditional database management systems offer powerful query languages, they do not allow keyword-...
PODS
1997
ACM
14 years 22 days ago
1997
ACM
We rework parts of the classical relational theory when the underlying domain is a structure with some interpreted operations that can be used in queries. We identify parts of the...
ICDT
2007
ACM
14 years 2 months ago
2007
ACM
Abstract. We study containment of conjunctive queries that are evaluated over databases that may contain tuples with null values. We assume the semantics of SQL for single block qu...