Relational Database Constraints

Which of the following is a condition that a foreign key must satisfy?

Which category of constraints are difficult to express within the data model and are expressed and enforced by the application programs?

Which condition must a key satisfy?

What is a candidate key in a relation schema?

What does the referential integrity constraint state?

What are constraints in a relational database?

What are the three categories of constraints in a relational database?

What is a domain constraint?

What is a key constraint?

What is a foreign key?

What are the conditions that a foreign key must satisfy?

What are super keys in a relation schema?

What are the conditions that a key should satisfy in a relation schema?

What is a candidate key in a relation schema?

What is the referential integrity constraint?