primary_key (310B)
1 # Primary key 2 3 A set of [attributes] which [functionally_determines] all other [attributes]. It can be expressed as [functional_dependencies], and it is a special case of them 4 5 - [primary_key_simple], which consists of a single [attribute] 6 - like [unary_functional_dependencies] 7 8 Up: [functional_dependency]