The Extended Relational Algebra, a Basis for Query Languages.
T. H. MerrettPublished in: JCDKB (1978)
Keyphrases
- relational algebra
- query language
- expressive power
- data model
- relational calculus
- relational model
- normal form
- relational database systems
- first order logic
- relational data model
- complex objects
- database query languages
- transitive closure
- recursive queries
- aggregate functions
- query evaluation
- regular expressions
- database
- functional dependencies
- algebraic operations
- object oriented
- sparql queries
- xml data
- relational databases
- database systems
- artificial intelligence