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, department_id VARCHAR)

### Question ###
What are the first and last name for those employees who works either in department 70 or 90?

### Accurate SQL ###

SELECT first_name, last_name FROM employees WHERE department_id = 70 OR department_id = 90