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DENSE_RANK

Returns the rank of a value within a group of values, without gaps in the ranks.

The rank value starts at 1 and continues up sequentially.

If two values are the same, they have the same rank.

Syntax

DENSE_RANK() OVER ( [ PARTITION BY <expr1> ] ORDER BY <expr2> [ ASC | DESC ] [ <window_frame> ] )

Examples

Create the table

CREATE TABLE employees (
employee_id INT,
first_name VARCHAR,
last_name VARCHAR,
department VARCHAR,
salary INT
);

Insert data

INSERT INTO employees (employee_id, first_name, last_name, department, salary) VALUES
(1, 'John', 'Doe', 'IT', 90000),
(2, 'Jane', 'Smith', 'HR', 85000),
(3, 'Mike', 'Johnson', 'IT', 82000),
(4, 'Sara', 'Williams', 'Sales', 77000),
(5, 'Tom', 'Brown', 'HR', 75000);

Calculating the total salary per department using DENSE_RANK

SELECT
department,
SUM(salary) AS total_salary,
DENSE_RANK() OVER (ORDER BY SUM(salary) DESC) AS dense_rank
FROM
employees
GROUP BY
department;

Result:

departmenttotal_salarydense_rank
IT1720001
HR1600002
Sales770003