Procedural and Non-Procedural Query Languages Revisited: A Comparison of Relational Algebra and Relational Calculus.
Gary W. HansenJames V. HansenPublished in: Int. J. Man Mach. Stud. (1987)
Keyphrases
- relational algebra
- relational calculus
- query language
- expressive power
- relational model
- data model
- object oriented
- normal form
- complex objects
- relational data model
- first order logic
- relational database systems
- transitive closure
- structured query language
- database
- recursive queries
- database query languages
- relational operators
- type checking
- databases
- sparql queries
- incomplete information
- query evaluation
- spatial databases
- aggregate functions
- database design
- metadata