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Questions and Answers
What does an entity constraint ensure in a relational data model?
What does an entity constraint ensure in a relational data model?
What does a domain constraint ensure?
What does a domain constraint ensure?
What is the primary function of a primary key in a relational data model?
What is the primary function of a primary key in a relational data model?
What is the purpose of a referential constraint in a relational database?
What is the purpose of a referential constraint in a relational database?
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Why is it important for a primary key to have non-NULL attributes?
Why is it important for a primary key to have non-NULL attributes?
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