How do you find the second highest salary?
Model answer
One way: SELECT MAX(salary) FROM employees WHERE salary < (SELECT MAX(salary) FROM employees). Another: ORDER BY salary DESC LIMIT 1 OFFSET 1 over distinct salaries. A more general way uses DENSE_RANK() in a window function and filters rank = 2. This is a very common interview question.
Learn this topic
SELECT, FROM and WHERE: Your First Queries in the course SQL for Beginners: Learn Databases Step by Step.
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