Extended relational algebra for reduction of natural quantifier COOL expressions.
James BradleyPublished in: J. Syst. Softw. (1996)
Keyphrases
- relational algebra
- relational model
- relational algebra expressions
- data model
- query language
- normal form
- expressive power
- first order logic
- complex objects
- relational calculus
- relational database systems
- relational data model
- transitive closure
- relational databases
- join operator
- database
- multi agent systems
- relational operators
- null values
- machine learning
- decision support
- recursive queries
- database systems
- database query languages
- database design
- summary tables
- data mining