Keyphrases
- nested relations
- storage structures
- data model
- recursive queries
- relational model
- normal form
- database management systems
- complex objects
- relational algebra
- query optimization
- query language
- b tree
- data types
- database design
- database applications
- database systems
- file structure
- database technology
- transaction management
- transitive closure
- object oriented
- information content
- join operations
- database
- conceptual model
- semi structured data
- functional dependencies
- database theory
- query processing
- data structure
- bitmap indexes
- xml data
- relational databases
- xml documents
- management system
- data integration
- fixpoint
- deductive databases
- data sources
- datalog programs
- incomplete information
- semi structured
- expressive power
- multi dimensional