Keyphrases
- relational algebra
- duplicate elimination
- algebraic operations
- database query languages
- expressive power
- relational model
- relational calculus
- normal form
- query language
- relational database systems
- data model
- aggregate functions
- complex objects
- relational data model
- first order logic
- recursive queries
- abstract data types
- join operator
- database
- transitive closure
- machine learning
- multi dimensional
- domain knowledge
- relational operators
- relational databases
- artificial intelligence