Getting an error - group function not allowed here

Question

Below is the merge statement...
getting an error - group function not allowed here
WHY????
merge into summary
using
(select
a.user_id,
min(a.start_time_utc),
max(a.end_time_utc),
sum(a.duration_seconds),
/*total_upload
total_download
total_traffic,*/
max(r.package_id),
last_usage_charge, -------hard coded
max(r.peak_rate),
max(r.bst_plantype),
max(r.free_value), ---for free value
a.IsPeak,
sum(a.TotalDiscount)
from aaa_sessions a,rate_plan r,subscriber_info si
where
si.EXTERNAL_ID=a.USER_ID
and
si.PACKAGE_ID=r.PACKAGE_ID
group by
user_id,bst_plantype,ispeak)t ------do we need to use alias here
on
(summary.user_id=t.user_id
and
summary.type_of_summary=t.bst_plantype
and
summary.ispeak=t.ispeak)
When matched then
update
set
start_date =decode((t.start_time_utc-summary.start_date)-abs(t.start_time_utc-summary.start_date),0,summary.start_date,t.start_time_utc),
end_date=decode((t.end_time_utc-summary.end_date)-abs(t.end_time_utc-summary.end_date),0,t.end_time_utc,s.end_date),
total_duration=summary.total_duration+sum(duration_seconds),
total_upload=summary.total_upload+sum(upload_bytes),
total_download=summary.total_download+sum(download_bytes),
total_traffic=summary.total_upload+sum(upload_bytes)+summary.total_download+sum(download_bytes)
When not matched then
INSERT
(user_id ,
start_date,
end_date,
total_duration,
/*total_upload
total_download
total_traffic,*/
rate_plan_id,
last_usage_charge,
peak_rate,
type_of_summary,
IsPeak,
TotalDiscount)
VALUES
(t.user_id,
t.start_time_utc,
t.end_time_utc,
t.duration_seconds,
/*t.output_bytes,
t.input_bytes,
t.output_bytes+aa.input_bytes,*/
t.PACKAGE_ID,
1, ---hard coded the value
t.PEAK_RATE,
t.BST_PLANTYPE,
t.ispeak,
t.free_value);

Answer 1

This is the query,...
Its giving no complilation errors..
I have not used aggregate functions in the insert/update..
have used only decode...
and nowhere i found that aggegate functions not allowed in the insert/update stmts of merge..
Can u please post a link where it is mentioned...
MERGE INTO summary
USING (SELECT a.user_id, MIN (a.start_time_utc) stc,
MAX (a.end_time_utc) etc, SUM (a.duration_seconds) ds,
SUM (a.download_bytes) download,
SUM (a.upload_bytes) upload, MAX (r.package_id) pkg_id,
MAX (r.peak_rate) p_rate, MAX (r.offpeak_rate)
ofp_rate,
MAX (r.bst_plantype) plan_type,
SUM (r.free_value) free_val, a.ispeak,
MAX (r.peak_pulse) p_pulse,
MAX (r.offpeak_pulse) ofp_pulse
FROM aaa_sessions a, rate_plan r, subscriber_info si
WHERE si.external_id = a.user_id
AND si.package_id = r.package_id
GROUP BY user_id, bst_plantype, ispeak) t
ON ( summary.user_id = t.user_id
AND summary.type_of_summary = t.plan_type
AND summary.rate_plan_id = t.pkg_id
AND summary.ispeak = t.ispeak)
WHEN MATCHED THEN
UPDATE
SET start_date =
DECODE ( (t.stc - summary.start_date)
- ABS (t.stc - summary.start_date),
0, summary.start_date,
t.stc
end_date =
DECODE ( (t.etc - summary.end_date)
- ABS (t.etc - summary.end_date),
0, t.etc,
summary.end_date
total_duration = summary.total_duration + t.ds,
total_download = summary.total_download + t.download,
total_upload = summary.total_upload + t.upload,
total_traffic =
summary.total_upload
+ t.upload
+ summary.total_download
+ t.download,
last_usage_charge =
DECODE (t.plan_type,
0, (t.ds - t.free_val)
/ DECODE (t.ispeak, 0, t.ofp_pulse, p_pulse)
* DECODE (t.ispeak, 0, t.ofp_rate, t.p_rate),
((t.download + t.upload) - t.free_val
* DECODE (t.ispeak, 0, t.ofp_rate, t.p_rate)
WHEN NOT MATCHED THEN
INSERT (user_id, start_date, end_date, total_duration,
total_download, total_upload, total_traffic, rate_plan_id,
last_usage_charge, peak_rate, type_of_summary, ispeak,
totaldiscount)
VALUES (t.user_id, t.stc, t.etc, t.ds, t.download, t.upload,
t.download + t.upload, t.pkg_id,
DECODE (t.plan_type,
0, (t.ds - t.free_val)
/ DECODE (t.ispeak, 0, t.ofp_pulse, p_pulse)
* DECODE (t.ispeak, 0, t.ofp_rate, t.p_rate),
((t.download + t.upload) - t.free_val
* DECODE (t.ispeak, 0, t.ofp_rate, t.p_rate)
t.p_rate, t.plan_type, t.ispeak, t.free_val);
COMMIT;