SELECT first_name ,  last_name ,  department_id FROM employees WHERE salary IN (SELECT MIN(salary) FROM employees GROUP BY department_id)
What are the full names and department ids for the lowest paid employees across all departments.
[Schema (values) (types)]: | hr_1 |  regions : region_id (text) , region_name (number) | countries : country_id (text) , country_name (number) , region_id (text) | departments : department_id (text) , department_name (number) , manager_id (text) , location_id (text) | jobs : job_id (text) , job_title (number) , min_salary (text) , max_salary (text) | employees : employee_id (text) , first_name (number) , last_name (text) , email (text) , phone_number (text) , hire_date (number) , job_id (number) , salary (text) , commission_pct (number) , manager_id (number) , department_id (text) | job_history : employee_id (text) , start_date (number) , end_date (text) , job_id (text) , department_id (text) | locations : location_id (text) , street_address (number) , postal_code (text) , city (text) , state_province (text) , country_id (number);