Need Tuning on SQL query

Question

Dear Guru,
We are facing a issue in performance part, we have a view as below and taking 9 minutes to throw output when try to query the below view.
let us know your valuable suggestion ASAP
CREATE OR REPLACE VIEW VW_WUF_HISTORY
(SPR, JOB_REFERENCE, JOB_CROSS_REFERENCE, JOB_TYPE_CODE, JOB_STATUS,
JOB_STATUS_REASON_CODE, FLOW_CREATED_DATE, FILE_CREATED_DATE, PROCESS_ID, WUF_FLOW_TYPE,
ADDITIONAL_INFORMATION, DATE_OF_ACTION, APPOINTMENT_DATE, APPOINTMENT_TIME_CODE, EARLIEST_APPOINTMENT_TIME,
LATEST_APPOINTMENT_TIME)
AS
SELECT SPR ,
JOB_REFERENCE ,
JOB_CROSS_REFERENCE ,
JOB_TYPE_CODE ,
JOB_STATUS ,
JOB_STATUS_REASON_CODE ,
FLOW_CREATED_DATE ,
FILE_CREATED_DATE ,
NVL(PROCESS_ID, USER_ID) PROCESS_ID,
WUF_FLOW_TYPE ,
ADDITIONAL_INFORMATION ,
DECODE(DATE_OF_ACTION, NULL,DATE_OF_ACTION, TO_DATE((TO_CHAR(DATE_OF_ACTION,'DD/MM/YYYY') ||' '|| RPAD(TIME_OF_ACTION,6,0)), 'DD/MM/YYYY HH24:MI:SS')) DATE_OF_ACTION,
APPOINTMENT_DATE ,
APPOINTMENT_TIME_CODE ,
EARLIEST_APPOINTMENT_TIME ,
LATEST_APPOINTMENT_TIME
FROM AR_FILE_COMPARE
WHERE FLOW_REF IN ('D2033001')
AND WUF_FLOW_TYPE IN ('N', 'R')
UNION ALL
SELECT SPR ,
JOB_REFERENCE ,
JOB_CROSS_REFERENCE ,
JOB_TYPE_CODE ,
JOB_STATUS ,
JOB_STATUS_REASON_CODE ,
FLOW_CREATED_DATE ,
FILE_CREATED_DATE ,
NVL(PROCESS_ID, USER_ID) PROCESS_ID ,
WUF_FLOW_TYPE ,
ADDITIONAL_INFORMATION ,
DECODE(DATE_OF_ACTION, NULL,DATE_OF_ACTION, TO_DATE((TO_CHAR(DATE_OF_ACTION,'DD/MM/YYYY') ||' '|| RPAD(TIME_OF_ACTION,6,0)), 'DD/MM/YYYY HH24:MI:SS')) DATE_OF_ACTION,
APPOINTMENT_DATE ,
APPOINTMENT_TIME_CODE ,
EARLIEST_APPOINTMENT_TIME ,
LATEST_APPOINTMENT_TIME
FROM TR_OFILE_COMPARE
WHERE FLOW_REF IN ('D2033001')
AND WUF_FLOW_TYPE IN ('N', 'R')
UNION ALL
SELECT
A.SPR ,
A.JOB_REFERENCE ,
A.JOB_CROSS_REFERENCE ,
A.JOB_TYPE_CODE ,
A.JOB_STATUS ,
A.JOB_STATUS_REASON_CODE ,
A.CREATED_DATE FLOW_CREATED_DATE,
NULL FILE_CREATED_DATE,
NVL(PROCESS_ID, USER_ID) PROCESS_ID ,
A.WUF_FLOW_TYPE ,
A.ADDITIONAL_INFORMATION ,
DECODE(B.DATE_OF_ACTION, NULL,B.DATE_OF_ACTION, TO_DATE((TO_CHAR(B.DATE_OF_ACTION,'DD/MM/YYYY') ||' '|| RPAD(B.TIME_OF_ACTION,6,0)), 'DD/MM/YYYY HH24:MI:SS')) DATE_OF_ACTION,
C.APPOINTMENT_DATE ,
C.APPOINTMENT_TIME_CODE ,
C.EARLIEST_APPOINTMENT_TIME ,
C. LATEST_APPOINTMENT_TIME
FROM TR_WUF_JOB_DETAIL A ,
TR_WUF_JOB_VISIT B ,
TR_WUF_NEW_APPT C
WHERE A.SPR = B.SPR (+)
AND A.SPR = C.SPR (+)
AND A.JOB_REFERENCE = B.JOB_REFERENCE (+)
AND A.JOB_REFERENCE = C.JOB_REFERENCE (+)
AND A.CREATED_DATE = B.CREATED_DATE (+)
AND A.CREATED_DATE = C.CREATED_DATE (+)
AND A.EXCEP_CODE IS NULL
AND WUF_FLOW_TYPE IN ('N', 'R')
/

Answer 1

What were you expecting the response time to be?
Maybe 9 minutes is excellent.Yes 9 minutes is excellent!
With 9 minuts I wouldn't been able to read half of it.