Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE employees ( first_name VARCHAR, last_name VARCHAR, salary INTEGER, department_id VARCHAR )

### Question ###
display the department ID, full name (first and last name), salary for those employees who is highest salary in every department.

### Accurate SQL ###

SELECT first_name, last_name, salary, department_id, MAX(salary) FROM employees GROUP BY department_id