An Extended Relational Algebra with Control over Duplicate Elimination.

Umeshwar Dayal Nathan Goodman Randy H. Katz

Published in: PODS (1982)

Keyphrases

relational algebra
duplicate elimination
expressive power
normal form
relational model
query language
data model
sql queries
relational database systems
space partitioning
complex objects
first order logic
relational databases
join algorithms
query optimization
database
functional dependencies
autonomous agents