SQL tables are the backbone of any relational database, storing structured data in rows and columns. This quiz tests your knowledge of table creation, constraints, and management to help you design efficient and reliable databases.
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Which constraint ensures that a column cannot have duplicate values?
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Question 3 of 15
3. Question
What is the main function of a PRIMARY KEY?
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Question 4 of 15
4. Question
Which command is used to delete all rows from a table but keep its structure?
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Question 5 of 15
5. Question
Which statement correctly adds a new column to an existing table?
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Question 6 of 15
6. Question
What does a FOREIGN KEY constraint do?
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Question 7 of 15
7. Question
Which constraint ensures a column cannot have NULL values?
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Question 8 of 15
8. Question
Which is the correct way to remove a table completely?
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Question 9 of 15
9. Question
A composite key is:
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Question 10 of 15
10. Question
Which command changes a table name in most SQL databases?
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Question 11 of 15
11. Question
What does a CHECK constraint do?
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Question 12 of 15
12. Question
What happens when you try to insert a row that violates a PRIMARY KEY?
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Question 13 of 15
13. Question
Which statement creates a table with an auto-incrementing ID in MySQL?
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Question 14 of 15
14. Question
Which table type is automatically dropped after a session ends?
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Question 15 of 15
15. Question
Which command modifies a column’s data type?
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Summary
These SQL Tables MCQs strengthen your skills in creating, altering, and managing relational database tables. Mastering these fundamentals helps ensure data integrity, performance, and efficient database design.
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