relational algebra
<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)
Nearby terms:
reincarnation, cycle of « reinvent the wheel «
relation «
relational algebra » relational calculus »
relational database » relational database management
system
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