If your data has a unique identifier that is a natural part of your data,you can use the field as a natural primary key.

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If your data already has a unique identifier that is a natural part of the data (such as a social security number for individuals or a product ID for products), then it is appropriate to use that as the primary key for the database table. This is because using a natural key ensures uniqueness and avoids redundant data.

If Your Data Has a Unique Identifier That Is a Natural