An improved division operator for relational algebra.
Mohammad DadashzadehPublished in: Inf. Syst. (1989)
Keyphrases
- relational algebra
- join operator
- relational operators
- normal form
- expressive power
- relational model
- data model
- query language
- relational calculus
- first order logic
- relational database systems
- complex objects
- transitive closure
- functional dependencies
- relational data model
- algebraic operations
- relational databases
- database
- aggregate functions
- null values
- machine learning
- database query languages
- knowledge representation