Containment of Conjunctive Queries over Databases with Null Values.
Carles FarréWerner NuttErnest TenienteToni UrpíPublished in: ICDT (2007)
Keyphrases
- containment of conjunctive queries
- null values
- databases
- integrity constraints
- relational databases
- inclusion dependencies
- normal form
- incomplete information
- query evaluation
- conjunctive queries
- query answering
- functional dependencies
- data dependencies
- query containment
- relational algebra
- decision procedures
- database theory
- database design
- database management systems
- database systems