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 employees (email VARCHAR, department_id VARCHAR, commission_pct VARCHAR, salary VARCHAR)
### Question:
display the emails of the employees who have no commission percentage and salary within the range 7000 to 12000 and works in that department which number is 50.
### Answer:
SELECT email FROM employees WHERE commission_pct = "null" AND salary BETWEEN 7000 AND 12000 AND department_id = 50