Human Performance in Relational Algebra, Tuple Calculus, and Domain Calculus.
Gary W. HansenJames V. HansenPublished in: Int. J. Man Mach. Stud. (1988)
Keyphrases
- relational calculus
- relational algebra
- database query languages
- expressive power
- relational model
- query language
- normal form
- complex objects
- data model
- transitive closure
- relational database systems
- relational operators
- first order logic
- aggregate functions
- relational data model
- type checking
- relational databases
- relational algebra expressions
- null values
- sql queries
- multi dimensional
- domain specific
- management system
- data sources
- databases