Oracle HRMS Scripts(Queries) - Employee Relation

SELECT
rel.PERSON_ID Person_id ,
rel.CONTACT_PERSON_ID CONTACT_PERSON_ID,
per.full_name,
per.date_of_birth ,
hr_general.decode_lookup ('SEX', per.sex) gender ,
(SELECT
    look_up.meaning
 FROM hr_lookups look_up
 WHERE look_up.lookup_type = 'CONTACT'
    AND look_up.enabled_flag = 'Y'
    and look_up.lookup_code =  rel.CONTACT_TYPE
)  Relation
FROM
    per_contact_relationships rel,
    per_people_f per
WHERE
    rel.CONTACT_PERSON_ID = per.person_id and
    per.BUSINESS_GROUP_ID=hr_general.GET_BUSINESS_GROUP_ID