and the relationship between compositional systems can then also be studied." Algebraic rules that are typically associated with functions can also be represented as diagrams, he says.

In a relational database, it is necessary to define the relationship ... diagram. If we added a third entity (Sport), we would have another relationship to add. The relationship between Sport ...

In a relational database, it is necessary to define the relationship that exists between different entities ... relational database management systems. In a sports centre, one surface can be ...