Remove Sunday Between To dates of a month

SELECT (TO_DATE(:TO_DATE) - (TO_DATE(:from_date)) + 1) -
       (SELECT COUNT(days)
          FROM (SELECT (TO_DATE(TO_CHAR(TO_DATE(:from_date), 'YYYYMMDD'),
                                'YYYYMMDD') + LEVEL - 1) days
                  FROM DUAL
                CONNECT BY LEVEL <=
                           TO_NUMBER(TO_CHAR(TO_DATE(:TO_DATE), 'DD')))
         WHERE TO_CHAR(days, 'DY') = 'SUN') AS total_working_days
  FROM DUAL