265 search results - page 39 / 53 » Tree-width and functional dependencies in databases |
VLDB
1999
ACM
13 years 12 months ago
1999
ACM
We present an optimization method and algorithm designed for three objectives: physical data independence, semantic optimization, and generalized tableau minimization. The method ...
VLDB
1998
ACM
13 years 12 months ago
1998
ACM
Oracle Materialized Views (MVs) are designed for data warehousing and replication. For data warehousing, MVs based on inner/outer equijoins with optional aggregation, can be refre...
KDD
1995
ACM
13 years 11 months ago
1995
ACM
Our work tackles the problem of finding partial determinations in databases and proposes a compressionbased measure to evaluate them. Partial determinations can be viewed as gener...
ICDE
2007
IEEE
14 years 9 months ago
2007
IEEE
Logical constraints, (e.g., 'phone numbers in toronto can have prefixes 416, 647, 905 only'), are ubiquitous in relational databases. Traditional integrity constraints, ...
WSDM
2010
ACM
14 years 5 months ago
2010
ACM
We consider a set of views stating possibly conflicting facts. Negative facts in the views may come, e.g., from functional dependencies in the underlying database schema. We want ...