29 Feb arity
Arity is used in relational databases and logical propositions to describe the number of arguments a function or relation is expected to possess. Relational database arities are one-to-one, one-to-many, many-to-many and variations that include the possibility of none. Functional arities are the number of arguments or relations needed to form a complete proposition or function.
[…] databases with primary and foreign keys enables us to express functional relationships of any arity, cardinality or modality (one-to-one, one-to-many, many-to-many). These are represented in the […]