Uniendo dos tablas SQL

Puede ser la consulta que estás buscando:

SELECT E.EMPLOYEE_ID
    ,E.FIRST_NAME
    ,E.LAST_NAME
    ,E.SALARY
FROM employees E
INNER JOIN salary S ON S.LOW_SALARY <= E.SALARY
                      AND S.HIGH_SALARY >= E.SALARY
                      AND S.SALARY_ID IN (2,3)
ORDER BY E.EMPLOYEE_ID

Espero que esto te ayude.