33 search results - page 7 / 7 » First-order complete and computationally complete query lang... |
SIGMOD
1995
ACM
13 years 11 months ago
1995
ACM
We study the problem of e cient maintenance of materialized views that may contain duplicates. This problem is particularly important when queries against such views involve aggre...
ICCS
2009
Springer
14 years 1 months ago
2009
Springer
Abstract. In knowledge bases, the open world assumption and the ability to express variables may lead to an answer redundancy problem. This problem occurs when the returned answers...
BMCBI
2011
13 years 2 months ago
2011
Background: The OMIM database is a tool used daily by geneticists. Syndrome pages include a Clinical Synopsis section containing a list of known phenotypes comprising a clinical s...