Null Values in Data Base Management: A Denotational Semantics Approach.
Yannis VassiliouPublished in: SIGMOD Conference (1979)
Keyphrases
- data base management
- denotational semantics
- null values
- databases
- programming language
- integrity constraints
- query language
- query evaluation
- relational databases
- relational algebra
- normal form
- incomplete information
- operational semantics
- data dependencies
- functional dependencies
- data model
- abstract data types
- expressive power
- containment of conjunctive queries
- database
- object oriented
- relational calculus
- database systems
- high level
- general purpose
- update operations
- database applications
- xml data
- software engineering