Computing Dictionary
relational algebra definition
database, theory A family of
algebra with a
well-founded semantics used for modelling the data stored in
relational databases, and defining queries on it. The main operations of the relational algebra are the
set operations (such as
union,
intersection, and
cartesian product), selection (keeping only some lines of a
table) and the
projection (keeping only some columns).
The
relational data model describes how the data is structured.
Codd's reduction algorithm can convert from
relational calculus to
relational algebra.
(1997-02-17)
