Reports (BIP) – Query to get Assignee details for a course

SELECT warf.ASSIGNMENT_RECORD_ID,
warf.EVENT_TYPE,
we.EVENT_TYPE we_event_type,
warf.EVENT_SUB_TYPE,
we.EVENT_SUB_TYPE we_EVENT_SUB_TYPE,
(SELECT person_number
FROM per_all_people_f
WHERE person_id = warf.EVENT_CREATED_BY_ID
AND TRUNC(SYSDATE) BETWEEN effective_start_date AND effective_end_date) created_By,
we.CREATED_BY_ID "Assigned_By_Person_Id",
(SELECT person_number
FROM per_all_people_f
WHERE person_id = we.CREATED_BY_ID
AND TRUNC(SYSDATE) BETWEEN effective_start_date AND effective_end_date) "Assigned_By",
warf.ATTRIBUTION_TYPE,
we.ATTRIBUTION_TYPE we_ATTRIBUTION_TYPE,
(SELECT person_number
FROM per_all_people_f
WHERE person_id = warf.ATTRIBUTION_ID
AND TRUNC(SYSDATE) BETWEEN effective_start_date AND effective_end_date) attribution_id,
warf.ATTRIBUTION_ID warf_ATTRIBUTION_ID,
we.ATTRIBUTION_ID we_ATTRIBUTION_ID,
warf.learner_id,
warf.ATTRIBUTION_LOOKUP_CODE,
warf.EVENT_ASSIGNMENT_ID
from WLF_ASSIGNMENT_RECORDS_F warf,
WLF_EVENT_ASSIGNMENTS_F weaf,
WLF_EVENTS we
where warf.EVENT_ASSIGNMENT_ID = weaf.EVENT_ASSIGNMENT_ID
and trunc(sysdate) between warf.effective_start_date and warf.effective_end_date
and trunc(sysdate) between weaf.effective_start_date and weaf.effective_end_date
and we.event_id = weaf.event_id