HELP: Duplicate name when using in GROUP BY

Question

I have three table and Select and insert statments as follows.. my problem is when I add the bolded lines, I get duplicate Estimator name
and id, I tried DISTINCT but didn't work.. can you look at it?
It is when I add the GROUP BY , and I can't go without that as it complains.. What are my choices?
thanks,
SELECT ESTIMATOR_NAME, estimator_id , TRUNC(AVG( result1 ),1) avg_new
, TRUNC(AVG( result2 ),1) avg_notified , result1 + result 2
FROM ( SELECT e.ESTIMATOR_NAME, e.estimator_id,
j.request_id
,MAX( DECODE(s.request_wflow_status,'New'
,NVL(end_date,SYSDATE)-start_date,NULL) ) result1
,MAX( DECODE(s.request_wflow_status,'Estimator
Notified'
,NVL(end_date,SYSDATE)-start_date,NULL) ) result2
FROM pm_estimators e, cc_requests j,
cc_request_status s
WHERE e.Estimator_id = j.Estimator_id AND
j.request_id = s.request_id
GROUP BY e.ESTIMATOR_NAME, e.estimator_id,
j.request_id)
GROUP BY ESTIMATOR_NAME, estimator_id, result1 +
result 2
Thank you,
My tables look like these...
CREATE table cc_request_status ( request_id number,
request_wflow_status varchar2(30), start_date Date,
End_date Date )
CREATE table pm_estimators ( Estimator_id number,
Estimator_name varchar2(100) )
CREATE table cc_requests (request_id number,
Estimator_id number)
insert into cc_request_status (request_id,
request_wflow_status, Start_date, End_date) values
(11,'New','03-Mar-07','09-Mar-07)
insert into cc_request_status request_id,
request_wflow_status, Start_date , End_date ) values
(11,'Estimator Notified','09-Mar-07','23-Mar-07)
insert into cc_request_status (request_id ,
request_wflow_status, Start_date, End_date) values
(12,'New','02-May-07','12-May-07)
insert into cc_request_status (request_id ,
request_wflow_status , Start_date , End_date ) values
(12,'Estimator Notified','12-May-07','21-May-07)
insert into cc_request_status ( request_id ,
request_wflow_status, Start_date ) values (
13,'New','02-May-07' )
insert into cc_request_status (request_id ,
request_wflow_status , Start_date , End_date ) values
(14,'New','01-May-07','26-May-07)
insert into cc_request_status (request_id ,
request_wflow_status , Start_date ) values
(14,'Estimator Notified','26-May-07')
insert into pm_estimators(Estimator_id,Estimator_name) values (3, 'JC Construction')
insert into pm_estimators(Estimator_id,Estimator_name) values (4, 'ABC Construction')
insert into pm_estimators(Estimator_id,Estimator_name) values (5, 'LM Decking')
insert into cc_requests (request_id, Estimator_id) values (100,3)
insert into cc_requests (request_id, Estimator_id) values (200,3)
insert into cc_requests (request_id, Estimator_id) values (300,3)
insert into cc_requests (request_id, Estimator_id) values (400,2)
insert into cc_requests (request_id, Estimator_id) values (125,2)
insert into cc_requests (request_id, Estimator_id) values (224,2)
insert into cc_requests (request_id, Estimator_id) values (344,3)
insert into cc_requests (request_id, Estimator_id) values (299,3)

Answer 1

try this
write a query which has result+1result2 (with alias) in the select clause and in the outer query use the alias name in group by clause
hope this helps
/rms