A Polymorphic Relational Algebra and Its Optimization.
David EichmannD. AltonPublished in: ICDE (1991)
Keyphrases
- relational algebra
- expressive power
- relational model
- query language
- normal form
- data model
- relational calculus
- complex objects
- relational database systems
- first order logic
- relational data model
- aggregate functions
- relational databases
- relational operators
- transitive closure
- algebraic operations
- database systems
- similarity measure
- recursive queries
- high dimensional
- null values
- artificial intelligence
- summary tables