関かん係けい代だい数すう

noun

relation algebra

A mathematical structure in the field of abstract algebra, dealing with binary relations and operations such as composition and converse.

• 関かん係けい代だい数すうは、二に項こう関かん係けいを扱あつかう代だい数すう系けいの一ひとつである。

  Relation algebra is one of the algebraic systems dealing with binary relations.

noun

relational algebra

In database theory, a formal system for manipulating relations (tables) using operations like selection, projection, and join.

• SQLの基き礎そには関かん係けい代だい数すうの考かんがえ方かたがある。

  The foundation of SQL lies in the concepts of relational algebra.