109 search results - page 17 / 22 » Optimization Using Tuple Subsumption |
ECCC
2011
13 years 1 months ago
2011
A family of permutations in Sn is k-wise independent if a uniform permutation chosen from the family maps any distinct k elements to any distinct k elements equally likely. Effici...
DLOG
2007
13 years 9 months ago
2007
Abstract. Concept approximation is an inference service for Description Logics that provides “translations” of concept descriptions from one DL to a less expressive DL. In [4] ...
ICDE
1998
IEEE
14 years 8 months ago
1998
IEEE
The association of timestamps with various data items such as tuples or attribute values is fundamental to the management of time-varying information. Using intervals in timestamp...
ER
2007
Springer
14 years 1 months ago
2007
Springer
Schema mappings come in different flavors: simple correspondences are produced by schema matchers, intensional mappings are used for schema integration. However, the execution of ...
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
Current day database applications, with large numbers of users, require fine-grained access control mechanisms, at the level of individual tuples, not just entire relations/views,...