PostgreSQL Subquery: Find the 4th minimum salary of all the salaries
16. Write a subquery to find the 4th minimum salary of all the salaries.
SELECT DISTINCT salary FROM employees e1 WHERE 4 = (SELECT COUNT(DISTINCT salary) FROM employees e2 WHERE e1.salary >= e2.salary);
Sample table: employees
pg_exercises=# SELECT DISTINCT salary pg_exercises-# FROM employees e1 pg_exercises-# WHERE 4 = (SELECT COUNT(DISTINCT salary) pg_exercises(# FROM employees e2 pg_exercises(# WHERE e1.salary >= e2.salary); salary --------- 2530.00 (1 row)
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