A Precise Definition of Basic Relational Notions and of the Relational Algebra.
Alain PirottePublished in: SIGMOD Rec. (1982)
Keyphrases
- relational algebra
- precise definition
- relational model
- algebraic operations
- relational calculus
- data model
- relational operators
- relational databases
- expressive power
- normal form
- relational data model
- query language
- aggregate functions
- database query languages
- relational database systems
- complex objects
- join operator
- database technology
- first order logic
- functional dependencies
- entity relationship
- nested relations
- incomplete information
- database
- transitive closure
- relational data
- conceptual model
- object identity
- summary tables
- relational algebra expressions
- databases
- probabilistic databases
- object oriented databases
- spatial databases
- data types
- database systems
- sparql queries
- data integration
- relational query languages