## relational calculus

<*database*> An operational methodolgy, founded on predicate
calculus, dealing with descripitive expressions that are
equivalent to the operations of relational algebra. Codd's
reduction algorithm can convert from relational calculus to
relational algebra.

Two forms of the relational calculus exist: the tuple calculus and the domain calculus.

["An Introduction To Database Systems" (6th ed), C. J. Date, Addison Wesley].

Last updated: 1998-10-05

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**relational calculus**» relational database » relational database management system » relational data model