Keyphrases
- relational algebra
- relational model
- expressive power
- normal form
- data model
- query language
- relational calculus
- relational database systems
- first order logic
- complex objects
- fuzzy sets
- database query languages
- aggregate functions
- transitive closure
- recursive queries
- relational databases
- fuzzy rules
- database
- summary tables
- semi automatic
- data structure
- artificial intelligence
- database technology
- database design
- algebraic operations
- data mining