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 ( role_code VARCHAR )

### Question ###
Show the role code with the least employees.

### Accurate SQL ###

SELECT role_code FROM Employees GROUP BY role_code ORDER BY COUNT(*) LIMIT 1