The Additivity Problem for Functional Dependencies in Incomplete Relations.
Mark LeveneGeorge LoizouPublished in: Acta Informatica (1997)
Keyphrases
- database technology
- functional dependencies
- relational databases
- null values
- relational model
- data dependencies
- relational data model
- universal relation
- inclusion dependencies
- database design
- multivalued dependencies
- database applications
- normal form
- cardinality constraints
- integrity constraints
- object oriented
- databases
- conflict free
- database
- database schemes
- set of functional dependencies
- relational algebra
- database schema
- join dependencies
- missing values
- dynamic constraints
- xml documents
- logical implication
- data structure
- horn theories
- relational schema
- missing data
- logic programs
- data model
- relational database theory
- approximate functional dependencies