2121 search results - page 4 / 425 » Indexing Incomplete Databases |
VLDB
2007
ACM
14 years 8 months ago
2007
ACM
PODS
1999
ACM
14 years 12 hour ago
1999
ACM
PODS
2007
ACM
14 years 7 months ago
2007
ACM
We show that relational algebra calculations for incomplete databases, probabilistic databases, bag semantics and whyprovenance are particular cases of the same general algorithms...
WWW
2009
ACM
14 years 8 months ago
2009
ACM
Web search engines often federate many user queries to relevant structured databases. For example, a product related query might be federated to a product database containing thei...
VLDB
1992
ACM
13 years 11 months ago
1992
ACM
For the conventional relational model there has been considerable research in the area of incomplete information. On the other hand, research in temporal databases has concentrated...