Evaluation of the Size of a Query Expressed in Relational Algebra.
Philippe RichardPublished in: SIGMOD Conference (1981)
Keyphrases
- relational algebra
- relational operators
- relational model
- algebraic operations
- sparql queries
- join operator
- probabilistic databases
- query language
- recursive queries
- data model
- expressive power
- normal form
- relational database systems
- duplicate elimination
- database
- relational calculus
- aggregate functions
- first order logic
- query evaluation
- relational data model
- relational algebra expressions
- query processing
- complex objects
- relational databases
- transitive closure
- database query languages
- data structure
- machine learning
- knowledge representation
- data sources
- database technology
- functional dependencies
- user defined
- summary tables
- universal quantification