next up previous contents
Next: The Extended Data Up: Stages of Translation Previous: Third Optimisation (OP3)

SQL

 

The Tuple Relational Calculus is a generic query language that is expressed in a set-theoretic notation. The relational calculus subset of database query lanaguages like SQL are (idiosyncratic?) syntactic variants of the set-theoretic Tuple Relational Calculus.



Chris Fox, September 1995