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  2. RPG400-L
  3. July 2019

Re: Using long names

This is interesting and maybe a database expert will chime in, but I've always thought of the identity key, the one assigned by the database, as the surrogate key. The customer number (in this thread) is the natural key, or business key, and is the primary key and it must be unique.

Sam

On 7/26/2019 1:11 PM, Alan Campin wrote:
My opinion only but the identity key should always be the primary key. The
surrogate key (Customer Number) should be unique key.

Every table has an identity key as the primary that uniquely definitions
that record so if you have a header/detail situation, the primary key of
the header goes into each detail record.


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