Practice - FOREIGN KEY Constraint
Practice Questions
Test your understanding with targeted questions
What does the FOREIGN KEY constraint do?
💡 Hint: Think about how tables relate to each other.
What is the action CASCADE used for in a FOREIGN KEY?
💡 Hint: Imagine deleting a department and what happens to its students.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What purpose does a FOREIGN KEY serve in SQL?
💡 Hint: Think about how different tables work together.
True or False: The ON DELETE CASCADE option allows for child records to be automatically deleted when a parent record is removed.
💡 Hint: Consider the effect of deleting a department.
1 more question available
Challenge Problems
Push your limits with advanced challenges
Design a database structure for a library that includes authors and books. Define the necessary keys and constraints, explaining why you chose each action for the foreign keys.
💡 Hint: Think about relations and how to maintain integrity.
Evaluate a situation where using SET NULL vs. CASCADE would be more advantageous when modeling employees linked to departments in a company database.
💡 Hint: Consider the implications of each action on data integrity.
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Reference links
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