135 search results - page 4 / 27 » Answering aggregate keyword queries on relational databases ... |
AMW
2009
13 years 8 months ago
2009
We investigate the space requirements for summaries needed for maintaining exact answers to aggregate queries over histories of relational databases. We show that, in general, a su...
PODS
2008
ACM
14 years 7 months ago
2008
ACM
Data exchange, also known as data translation, has been extensively investigated in recent years. One main direction of research has focused on the semantics and the complexity of...
ICDE
2009
IEEE
14 years 9 months ago
2009
IEEE
Keyword queries enjoy widespread usage as they represent an intuitive way of specifying information needs. Recently, answering keyword queries on graph-structured data has emerged ...
ICDT
2010
ACM
13 years 11 months ago
2010
ACM
Relational data exchange deals with translating a relational database instance over some source schema into a relational database instance over some target schema, according to a ...
ICDT
2001
ACM
14 years 9 hour ago
2001
ACM
Abstract. The problem of answering queries using views has been studied extensively due to its relevance in a wide variety of data-management applications. In these applications, w...