If the primary key of a table contains only a single field, the table is automatically in second normal form (2NF).

Name: If the primary key of a table contains only a single field, the table is automatically in second normal form (2NF).
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Quizplus · Accepted Answer

A table with a single-field primary key is automatically in 2NF because there are no partial dependencies; all non-key attributes are fully functionally dependent on the primary key.

If the Primary Key of a Table Contains Only a Single