List Salesrep Salary Query

/* Formatted on 7/8/2014 9:33:33 AM (QP5 v5.115.810.9015) */
SELECT p.person_id,
       p.full_name,
       p.employee_number,
       p.business_group_id,
       (pp.proposed_salary_n * b.pay_annualization_factor) salary,
       e.aei_information3 variable
FROM per_all_people_f p,
     per_all_assignments_f a,
     per_pay_proposals pp,
     per_pay_bases b,
     per_assignment_extra_info e
WHERE     NVL (p.effective_start_date, SYSDATE) <= SYSDATE
      AND p.person_id = 19637
      AND NVL (p.effective_end_date, SYSDATE) >= SYSDATE
      AND p.person_id = a.person_id
      AND NVL (a.effective_end_date, SYSDATE) >= SYSDATE
      AND pp.assignment_id = a.assignment_id
      AND (NVL (pp.date_to, SYSDATE) >= SYSDATE
           OR pp.date_to = (SELECT MAX (pp_sub.date_to)
                            FROM per_pay_proposals pp_sub
                            WHERE pp_sub.assignment_id = pp.assignment_id))
      AND b.pay_basis_id = a.pay_basis_id
      AND e.assignment_id = a.assignment_id
      AND e.information_type = 'SSFT_COMMISSION_PLAN'
      AND e.aei_information4 IN
               ('Commission Direct Selling',
                'Commission Sales Support',
                'Commission Sales Engineers')
      AND NVL (TO_DATE (e.aei_information1, 'DD-MON-YYYY'), SYSDATE) <=
            SYSDATE
      AND NVL (TO_DATE (e.aei_information2, 'DD-MON-YYYY'), SYSDATE) >=
            SYSDATE;