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Question

In a STAR schema, why must the primary key of each dimension table also be a foreign key in the fact table?

a.

To increase the size of the fact table

b.

To complicate the structure of the fact table

c.

To enforce data consistency

d.

To enable one-to-one relationships between tables

Answer: (c).To enforce data consistency Explanation:Foreign keys in the fact table ensure data consistency and maintain the relationships between dimension and fact tables.

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Q. In a STAR schema, why must the primary key of each dimension table also be a foreign key in the fact table?

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