Keyphrases
- relational model
- relational algebra
- data model
- relational databases
- database technology
- relational data model
- data modeling
- functional dependencies
- query language
- relational database systems
- complex objects
- incomplete information
- relational calculus
- conceptual model
- database query languages
- databases
- entity relationship
- aggregate functions
- database management systems
- database
- database systems
- object oriented
- nested relations
- data types
- integrity constraints
- xml data
- relational models
- end users
- spatial databases
- database applications
- xml schema
- database design