Keyphrases
- nested relations
- relational algebra
- normal form
- relational model
- complex objects
- query language
- expressive power
- data model
- relational calculus
- relational database systems
- nested relational
- transitive closure
- relational data model
- relational databases
- first order logic
- database technology
- functional dependencies
- algebraic operations
- relational operators
- database design
- data integration
- recursive queries
- database query languages
- summary tables
- database
- aggregate functions