Time-Based Operators for Relational Algebra Query Languages.
Mostafa A. BassiouniMark J. LlewellynAmar MukherjeePublished in: Comput. Lang. (1993)
Keyphrases
- relational algebra
- query language
- relational operators
- join operator
- aggregate functions
- expressive power
- data model
- relational model
- relational calculus
- summary tables
- relational database systems
- complex objects
- normal form
- transitive closure
- recursive queries
- first order logic
- database query languages
- object oriented
- query evaluation
- database
- constraint databases
- relational data model
- conjunctive queries
- relational databases
- xml data
- databases
- artificial intelligence
- database management systems
- regular expressions
- user defined
- functional dependencies