Sciweavers

719 search results - page 6 / 144
» Normalizing Incomplete Databases
Sort
View
VLDB
2007
ACM
141views Database» more  VLDB 2007»
14 years 7 months ago
Query Processing over Incomplete Autonomous Databases
Incompleteness due to missing attribute values (aka "null values") is very common in autonomous web databases, on which user accesses are usually supported through media...
Garrett Wolf, Hemal Khatri, Bhaumik Chokshi, Jianc...
DEXAW
2006
IEEE
111views Database» more  DEXAW 2006»
14 years 1 months ago
A Strongly Minimal Axiomatisation of Multivalued Dependencies in Incomplete Database Relations
We study inference rules for multivalued dependencies in relational databases with null values (NMVDs). The definition of NMVDs is dependent on the underlying relation schema and ...
Sebastian Link
HIS
2003
13 years 9 months ago
A Hybrid Approach for Learning Parameters of Probabilistic Networks from Incomplete Databases
– Probabilistic Inference Networks are becoming increasingly popular for modeling and reasoning in uncertain domains. In the past few years, many efforts have been made in learni...
S. Haider
ISI
2002
Springer
13 years 7 months ago
Getting right answers from incomplete multidimensional databases
Dealing with large volumes of data, OLAP data cubes aggregated values are often spoiled by errors due to missing values in detailed data. This paper suggests to adjust aggregate an...
Sabine Goutier, Georges Hébrail, Vér...