282 search results - page 6 / 57 » Merging Databases Under Constraints |
116
click to vote
ICDT
2012
ACM
13 years 2 months ago
2012
ACM
A universal model of a database D and a set Σ of integrity constraints is a database that extends D, satisfies Σ, and is most general in the sense that it contains sound and co...
188
click to vote
ICDE
2008
IEEE
16 years 1 months ago
2008
IEEE
The main challenge in integrating two hierarchies is determining the correspondence between the nodes and edges of each hierarchy. Traditionally, the correspondence is determined ...
187
click to vote
ICDE
1997
IEEE
16 years 1 months ago
1997
IEEE
The need to transform data between heterogeneous databases arises from a number of critical tasks in data management. These tasks are complicated by schema evolution in the underl...
130
click to vote
RULES
1993
Springer
15 years 3 months ago
1993
Springer
Semantic models have shown the utility of arbitrary user-de ned relationships for de ning the semantics of database information, while objectoriented models have developed a stron...
ICDT
2005
ACM
15 years 5 months ago
2005
ACM
We study the problem of rewriting queries using views in the presence of access patterns, integrity constraints, disjunction, and negation. We provide asymptotically optimal algori...