Oracle HRMS Position Query

/* Formatted on 5/15/2014 9:12:46 AM (QP5 v5.115.810.9015) */
SELECT   DISTINCT PD.segment1 POSITION_NUMBER,
                  pd.segment2 POSITION_NAME,
                  pd.segment3 POSITION_GRADE,
                  (SELECT   name
                     FROM   hr_all_organization_units
                    WHERE   ORGANIZATION_ID = pd.segment4)
                     org,
                  pd.segment4 org_id,
                  pd.segment5 POSITION_CODE,
                  po.name position,
                  j.name job,
                  po.position_id
  FROM   per_positions po,
         per_jobs j,
         hr_all_organization_units org,
         PER_POSITION_DEFINITIONS PD
 WHERE       1 = 1
         AND po.BUSINESS_GROUP_ID = 81
         AND pd.POSITION_DEFINITION_ID = po.POSITION_DEFINITION_ID
         AND j.job_id = po.job_id
         AND org.ORGANIZATION_ID = po.ORGANIZATION_ID
         AND po.position_id = 17624