Strange Condition Oracle Merge

Question

I have an Oracle Merge statement. The condition I am facing is that the statement is updating the table as well as inserting the record that its updated. I have duplicates in the table for this reason. Can someone please advice why this condition occurs? the primary key constraint of the table is disabled.

Answer 1

The Merge statement is attached below. I am selecting my query from a view thats based on a table. My aim is to generate a summary at a level higher than that of the table. date_key here refers to the weekend date. ITs used instead of a week id.
My problem is that the table has duplicate records after the merge. when i run the select part of this merge, it doesnt get me any duplicates.
MERGE INTO WEEKLY_PGROUP_SUMMARY w
USING (
SELECT date_key, ccid, year_id, period_id, week_id, company, country,
location, brand, mainbrand, pgroup,
sales_qty, sales_cost, sales_value,
fp_sales_qty, fp_sales_cost, fp_sales_value,
md_sales_qty, md_sales_cost, md_sales_value,
sreturns_qty, sreturns_cost, sreturns_value,
grn_qty, grn_cost, grn_value,
tfrin_qty, tfrin_cost, tfrin_value,
tfrout_qty, tfrout_cost, tfrout_value,
intake_qty, intake_cost, intake_value,
preturns_qty, preturns_cost, preturns_value,
adjm_qty, adjm_cost, adjm_value,
adjw_qty, adjw_cost, adjw_value,
adjc_qty, adjc_cost, adjc_value,
adjt_qty, adjt_cost, adjt_value,
adjv_qty, adjv_cost, adjv_value,
stockob_qty, stockob_cost, stockob_value,
fp_stockob_qty, fp_stockob_cost, fp_stockob_value,
md_stockob_qty, md_stockob_cost, md_stockob_value,
tm_stockob_qty, tm_stockob_cost, tm_stockob_value,
stockcl_qty, stockcl_cost, stockcl_value,
fp_stockcl_qty, fp_stockcl_cost, fp_stockcl_value,
md_stockcl_qty, md_stockcl_cost, md_stockcl_value,
se_stockcl_qty, tm_stockcl_cost, tm_stockcl_value,
tm_stockcl_qty, se_stockcl_cost, se_stockcl_value,
co_stockcl_qty, co_stockcl_cost, co_stockcl_value,
currency, exrate1, exrate2, exrate3, exrate4, exrate5
FROM generate_pgroup_summary_v ) v
-- On condition includes all fields that are indexed
ON (v.date_key = w.date_key AND v.ccid = w.ccid AND v.brand = w.brand
AND v.pgroup = w.pgroup)
WHEN MATCHED THEN
UPDATE
SET w.currency = v.currency,
w.exrate1 = v.exrate1,
w.exrate2 = v.exrate2,
w.exrate3 = v.exrate3,
w.exrate4 = v.exrate4,
w.exrate5 = v.exrate5,
w.sales_qty = v.sales_qty,
w.sales_cost = v.sales_cost,
w.sales_value = v.sales_value,
w.fp_sales_qty = v.fp_sales_qty,
w.fp_sales_cost = v.fp_sales_cost,
w.fp_sales_value = v.fp_sales_value,
w.md_sales_qty = v.md_sales_qty,
w.md_sales_cost = v.md_sales_cost,
w.md_sales_value = v.md_sales_value,
w.sreturns_qty = v.sreturns_qty,
w.sreturns_cost = v.sreturns_cost,
w.sreturns_value = v.sreturns_value,
w.grn_qty = v.grn_qty,
w.grn_cost = v.grn_cost,
w.grn_value = v.grn_value,
w.tfrin_qty = v.tfrin_qty,
w.tfrin_cost = v.tfrin_cost,
w.tfrin_value = v.tfrin_value,
w.tfrout_qty = v.tfrout_qty,
w.tfrout_cost = v.tfrout_cost,
w.tfrout_value = v.tfrout_value,
w.intake_qty = v.intake_qty,
w.intake_cost = v.intake_cost,
w.intake_value = v.intake_value,
w.preturns_qty = v.preturns_qty,
w.preturns_cost = v.preturns_cost,
w.preturns_value = v.preturns_value,
w.adjm_qty = v.adjm_qty,
w.adjm_cost = v.adjm_cost,
w.adjm_value = v.adjm_value,
w.adjw_qty = v.adjw_qty,
w.adjw_cost = v.adjw_cost,
w.adjw_value = v.adjw_value,
w.adjc_qty = v.adjc_qty,
w.adjc_cost = v.adjc_cost,
w.adjc_value = v.adjc_value,
w.adjt_qty = v.adjt_qty,
w.adjt_cost = v.adjt_cost,
w.adjt_value = v.adjt_value,
w.adjv_qty = v.adjv_qty,
w.adjv_cost = v.adjv_cost,
w.adjv_value = v.adjv_value,
w.stockob_qty = v.stockob_qty,
w.stockob_cost = v.stockob_cost,
w.stockob_value = v.stockob_value,
w.fp_stockob_qty = v.fp_stockob_qty,
w.fp_stockob_cost = v.fp_stockob_cost,
w.fp_stockob_value = v.fp_stockob_value,
w.md_stockob_qty = v.md_stockob_qty,
w.md_stockob_cost = v.md_stockob_cost,
w.md_stockob_value = v.md_stockob_value,
w.tm_stockob_qty = v.tm_stockob_qty,
w.tm_stockob_cost = v.tm_stockob_cost,
w.tm_stockob_value = v.tm_stockob_value,
w.stockcl_qty = v.stockcl_qty,
w.stockcl_cost = v.stockcl_cost,
w.stockcl_value = v.stockcl_value,
w.fp_stockcl_qty = v.fp_stockcl_qty,
w.fp_stockcl_cost = v.fp_stockcl_cost,
w.fp_stockcl_value = v.fp_stockcl_value,
w.md_stockcl_qty = v.md_stockcl_qty,
w.md_stockcl_cost = v.md_stockcl_cost,
w.md_stockcl_value = v.md_stockcl_value,
w.se_stockcl_qty = v.se_stockcl_qty,
w.se_stockcl_cost = v.se_stockcl_cost,
w.se_stockcl_value = v.se_stockcl_value,
w.tm_stockcl_qty = v.tm_stockcl_qty,
w.tm_stockcl_cost = v.tm_stockcl_cost,
w.tm_stockcl_value = v.tm_stockcl_value,
w.co_stockcl_qty = v.co_stockcl_qty,
w.co_stockcl_cost = v.co_stockcl_cost,
w.co_stockcl_value = v.co_stockcl_value,
w.modifiedon=stime
WHEN NOT MATCHED THEN
INSERT (date_key, ccid, year_id, period_id, week_id,
company, country,location, brand, mainbrand,
pgroup,
sales_qty, sales_cost, sales_value,
fp_sales_qty, fp_sales_cost, fp_sales_value,
md_sales_qty, md_sales_cost, md_sales_value,
sreturns_qty, sreturns_cost, sreturns_value,
grn_qty, grn_cost, grn_value,
tfrin_qty, tfrin_cost, tfrin_value,
tfrout_qty, tfrout_cost, tfrout_value,
intake_qty, intake_cost, intake_value,
preturns_qty, preturns_cost, preturns_value,
adjm_qty, adjm_cost, adjm_value,
adjw_qty, adjw_cost, adjw_value,
adjc_qty, adjc_cost, adjc_value,
adjt_qty, adjt_cost, adjt_value,
adjv_qty, adjv_cost, adjv_value,
stockob_qty, stockob_cost, stockob_value,
fp_stockob_qty, fp_stockob_cost, fp_stockob_value,
md_stockob_qty, md_stockob_cost, md_stockob_value,
tm_stockob_qty, tm_stockob_cost, tm_stockob_value,
stockcl_qty, stockcl_cost, stockcl_value,
fp_stockcl_qty, fp_stockcl_cost, fp_stockcl_value,
md_stockcl_qty, md_stockcl_cost, md_stockcl_value,
se_stockcl_qty, tm_stockcl_cost, tm_stockcl_value,
tm_stockcl_qty, se_stockcl_cost, se_stockcl_value,
co_stockcl_qty, co_stockcl_cost, co_stockcl_value,
currency, exrate1, exrate2, exrate3, exrate4, exrate5,
modifiedon)
values
(v.date_key, v.ccid, v.year_id, v.period_id, v.week_id, v.company, v.country,
v.location, v.brand, v.mainbrand, v.pgroup,
v.sales_qty, v.sales_cost, v.sales_value,
v.fp_sales_qty, v.fp_sales_cost, v.fp_sales_value,
v.md_sales_qty, v.md_sales_cost, v.md_sales_value,
v.sreturns_qty, v.sreturns_cost, v.sreturns_value,
v.grn_qty, v.grn_cost, v.grn_value,
v.tfrin_qty, v.tfrin_cost, v.tfrin_value,
v.tfrout_qty, v.tfrout_cost, v.tfrout_value,
v.intake_qty, v.intake_cost, v.intake_value,
v.preturns_qty, v.preturns_cost, v.preturns_value,
v.adjm_qty, v.adjm_cost, v.adjm_value,
v.adjw_qty, v.adjw_cost, v.adjw_value,
v.adjc_qty, v.adjc_cost, v.adjc_value,
v.adjt_qty, v.adjt_cost, v.adjt_value,
v.adjv_qty, v.adjv_cost, v.adjv_value,
v.stockob_qty, v.stockob_cost, v.stockob_value,
v.fp_stockob_qty, v.fp_stockob_cost, v.fp_stockob_value,
v.md_stockob_qty, v.md_stockob_cost, v.md_stockob_value,
v.tm_stockob_qty, v.tm_stockob_cost, v.tm_stockob_value,
v.stockcl_qty, v.stockcl_cost, v.stockcl_value,
v.fp_stockcl_qty, v.fp_stockcl_cost, v.fp_stockcl_value,
v.md_stockcl_qty, v.md_stockcl_cost, v.md_stockcl_value,
v.se_stockcl_qty, v.tm_stockcl_cost, v.tm_stockcl_value,
v.tm_stockcl_qty, v.se_stockcl_cost, v.se_stockcl_value,
v.co_stockcl_qty, v.co_stockcl_cost, v.co_stockcl_value,
v.currency, v.exrate1, v.exrate2, v.exrate3, v.exrate4, v.exrate5,
stime);