The "one" field of a one-to-many relationship is never the primary key field in the table on the "one" side of the relationship.

Name: The "one" field of a one-to-many relationship is never the primary key field in the table on the "one" side of the relationship.
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In a one-to-many relationship, the "one" side often uses the primary key as the unique identifier, which is then referenced by a foreign key in the table on the "many" side to establish the relationship.

The "One" Field of a One-To-Many Relationship Is Never the Primary