SQL ROW_NUMBER and RANK

Assign sequential rankings and partitioned row numbers to query rows.

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Window ranking functions calculate positions within a result set: ROW_NUMBER() assigns unique sequential integers, while RANK() leaves gaps when values tie, and DENSE_RANK() does not leave gaps.

Key Takeaways: SQL ROW_NUMBER and RANK

Mastering SQL ROW_NUMBER and RANK helps you write clean and reliable SQL code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.

SQL ROW_NUMBER and RANK Code Example

SQL

SELECT name, salary,
       ROW_NUMBER() OVER (ORDER BY salary DESC) AS row_num,
       RANK() OVER (ORDER BY salary DESC) AS rank_pos
FROM employees;

Output

Returns employees sorted by salary with sequential row numbers

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SQL ROW_NUMBER and RANK

💡 Key Takeaways: SQL ROW_NUMBER and RANK

SQL ROW_NUMBER and RANK Code Example

Key Takeaways: SQL ROW_NUMBER and RANK