Indexes in SQL enhance the speed of data retrieval. The two main types—clustered and non-clustered—serve different purposes and performance goals. This quiz on SQL clustered vs non-clustered helps you understand their structure, differences, and use cases.
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Which index includes the actual data rows in the index structure?
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Question 6 of 15
6. Question
Which type of index is more efficient for range-based queries (e.g., BETWEEN, >, <)?
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Question 7 of 15
7. Question
Which index stores a copy of the key and a row locator?
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Question 8 of 15
8. Question
Which statement is true about clustered indexes?
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Question 9 of 15
9. Question
What happens if a table has no clustered index?
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Question 10 of 15
10. Question
Which index type is best for columns used in JOINs and WHERE clauses?
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Question 11 of 15
11. Question
What does a composite index include?
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Question 12 of 15
12. Question
Which of the following can be included in a non-clustered index but not in a clustered index?
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Question 13 of 15
13. Question
Which index generally improves performance of SELECT queries but slows down INSERT/UPDATE?
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Question 14 of 15
14. Question
Which of the following is FALSE about non-clustered indexes?
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Question 15 of 15
15. Question
When should you use a clustered index?
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Summary
Knowing the difference between clustered and non-clustered indexes is essential for optimizing SQL queries. This quiz on SQL clustered vs non-clustered indexes tests your understanding of index types, behaviors, and how they impact performance.
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