Assertion: natural key | /r/HasProperty | unique
Facets:
value: in a database
type: LOCATION
Source sentences:
text: For example, in a customer master table, the same customer may have multiple records under separate customer IDs, even though the natural key (a combination of customer name, date of birth, and E-mail address) would be unique.
text: A natural key (also known as business key) is a type of unique key in a database formed of attributes that exist and are used in the external world outside the database (i.e. in the business domain or domain of discourse).