The Bipolar Semantics of Querying Null Values in Regular and Fuzzy Databases - Dealing with Inapplicability.
Tom MatthéGuy De TréPublished in: IPMU (2) (2010)
Keyphrases
- null values
- databases
- relational databases
- integrity constraints
- containment of conjunctive queries
- relational algebra
- query evaluation
- query language
- normal form
- database
- incomplete information
- relational database theory
- functional dependencies
- data model
- data management
- database applications
- update operations
- query processing
- data retrieval
- predicate logic
- metadata
- data warehouse
- logic programming
- complex objects
- relational model
- database theory