Top Earners by Department with Window Functions

Your question is Top Earners by Department with Window Functions. Start with the requirements and the two tables on the right.

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Problem

Brillio's People Analytics team needs a department-level view of its highest-paid active employees. Write a PostgreSQL query that ranks employees within each department using a window function and returns the top five.

Requirements

Join employees to departments using department_id.
Include only employees whose employment_status is Active and whose salary is not NULL.
Use a window function partitioned by department, ranking salary from highest to lowest. Use employee_id as a deterministic tie-breaker.
Return no more than five employees per department, ordered by department and rank.

Schema

departments

Column	Type	Description
department_idPK	INT	Unique department identifier
department_name	VARCHAR(100)	Department name

employees

Column	Type	Description
employee_idPK	INT	Unique employee identifier
employee_name	VARCHAR(100)	Employee's full name
department_id	INT	References departments.department_id
salary	NUMERIC(12,2)	Annual salary
employment_status	VARCHAR(20)	Current employment status