The Expressiveness of Query Languages for Nested Relations.
Marc GyssensDirk Van GuchtPublished in: IEEE Data Eng. Bull. (1988)
Keyphrases
- nested relations
- query language
- expressive power
- relational algebra
- complex objects
- recursive queries
- data model
- database
- query evaluation
- normal form
- data complexity
- relational model
- transitive closure
- regular expressions
- object oriented
- relational calculus
- xml data
- semistructured data
- constraint databases
- relational database systems
- conceptual model
- conjunctive queries
- user defined
- database design
- data structure
- databases