Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE departments (department_name VARCHAR, department_id VARCHAR); CREATE TABLE employees (department_id VARCHAR)
### Question:
find the name of all departments that do actually have one or more employees assigned to them.
### Answer:
SELECT DISTINCT T2.department_name FROM employees AS T1 JOIN departments AS T2 ON T1.department_id = T2.department_id