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What is a relational database model? What is a relational schema? What is a relational database? What is a primary key? What is a composite

What is a relational database model?

What is a relational schema?

What is a relational database?

What is a primary key?

What is a composite primary key?

What is a foreign key?

What is Relational database constraint?

What is an entity integrity constraint?

What is referential integrity constraint?

What are the business rules?

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