What is natural key in fact table?

What is meant by natural key?

A natural key (also known as business key or domain 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).

What is natural and surrogate key?

A natural key is one or more existing data attributes that are unique to the business concept. For the Customer table there was two candidate keys, in this case CustomerNumber and SocialSecurityNumber. Surrogate key. Introduce a new column, called a surrogate key, which is a key that has no business meaning.

What is the difference between primary key and natural key?

A primary key uniquely identifies each record within a table and relates records to additional data stored in other tables. A natural key might require several fields to accomplish a unique identity for each record. A surrogate key is unique in and of itself.

What is natural key in Oracle?

Answer: First, tp review, a "natural" key is a key that already exists within a table (such as the Social Security Nunber of a person, while s surrogate key has no business meaning and is a unique number generated by an Oracle "sequence".