SQL Ranking Functions such as ROW_NUMBER(), RANK(), and DENSE_RANK() are used to assign unique row positions in result sets. These functions are commonly used for pagination, top-N queries, and eliminating duplicates while preserving ranking logic.
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Which SQL function assigns a unique sequential number to each row within a result set?
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Question 2 of 15
2. Question
What happens in RANK() when two rows tie for a rank?
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Question 3 of 15
3. Question
What’s the key difference between RANK() and DENSE_RANK()?
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Question 4 of 15
4. Question
What will ROW_NUMBER() return for two identical rows in an ordered partition?
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Question 5 of 15
5. Question
Which function is most suitable when you want no gaps in ranking?
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Question 6 of 15
6. Question
What clause is required with all ranking functions?
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Question 7 of 15
7. Question
Which function can be used to fetch the top 1 row per group based on a score?
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Question 8 of 15
8. Question
What rank will the third row get in RANK() if the first two rows tie?
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Question 9 of 15
9. Question
Which function assigns the same rank to tied rows and the next rank is immediately after?
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Question 10 of 15
10. Question
Which function returns identical rank values for duplicate ordering values and always increments by 1 afterward?
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Question 11 of 15
11. Question
Can ranking functions be used without the OVER() clause?
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Question 12 of 15
12. Question
What will happen if ORDER BY is not provided inside OVER()?
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Question 13 of 15
13. Question
Which ranking function is best for pagination where uniqueness isn’t important?
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Question 14 of 15
14. Question
Which of the following is true about ROW_NUMBER()?
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Question 15 of 15
15. Question
Which function is most appropriate to avoid duplicate rankings with gaps?
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Summary
SQL Ranking Functions such as ROW_NUMBER(), RANK(), and DENSE_RANK() are essential for advanced querying tasks like top-N filtering, pagination, leaderboards, and deduplication. Mastering their subtle differences helps write efficient and accurate analytical queries.
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