ORACLE Query Get Last ID Using MIN Based On Quantity Consumed By ID - oracle

Question

I have Incoming Stock transaction data using Oracle:
ID | DESCRIPTION | PART_NO | QUANTITY | DATEADDED
TR5 | FG | P0025 | 5 | 06-SEP-2017 08:20:33 <-- just now added
TR4 | Test | TEST1 | 8 | 05-SEP-2017 15:11:15
TR3 | FG | GSDFGSG | 10 | 31-AUG-2017 16:26:04
TR2 | FG | GSDFGSG | 2 | 31-AUG-2017 16:05:39
TR1 | FG | GSDFGSG | 2 | 30-AUG-2017 16:30:16
And now I'm grouping that data to be:
TR_ID | PART_NO | TOTAL
TR1 | GSDFGSG | 14
TR4 | TEST1 | 8
TR5 | P0025 | 5 <-- just now added
Query Code:
SELECT MIN(TRANSACTION_EQUIPMENTID) as TR_ID,
PART_NO,
SUM(T.QUANTITY) AS TOTAL
FROM WA_II_TBL_TR_EQUIPMENT T
GROUP BY T.PART_NO
As you can see on that data and query code, I'm show TR_ID using MIN to get first ID on first transaction.
And now I have Outgoing transaction data:
Assume I try to get quantity 8
ID_FK | QUANTITY
TR1 | 8
And now I want to get last ID due to quantity 8 has been consumed
ID | DESCRIPTION | PART_NO | QUANTITY
TR3| FG | GSDFGSG | 10 <-- CONSUMED 4+2+2, TOTAL 8
TR2| FG | GSDFGSG | 2 <-- CONSUMED 2+2, TOTAL 4
TR1| FG | GSDFGSG | 2 <-- CONSUMED 2
As you can see above, TR1, TR2 has been consumed. Now I want the query
SELECT MIN(TRANSACTION_EQUIPMENTID) as TR_ID,
PART_NO,
SUM(T.QUANTITY) AS TOTAL
FROM WA_II_TBL_TR_EQUIPMENT T
GROUP BY T.PART_NO
get the last id is : TR3, due to TR1 & TR2 has been consumed.
How to do that in query?

Answer 1

Take minimum id where growing sum is greater than 8. Use analytic sum():
select min(id) id
from (select t.*,
sum(quantity) over (partition by part_no order by id) sq
from t
where part_no = 'GSDFGSG'
)
where sq >= 8
Test data, output:
create table t(ID varchar2(3), DESCRIPTION varchar2(5),
PART_NO varchar2(8), QUANTITY number(5), DATEADDED date);
insert into t values ('TR4', 'Test', 'TEST1', 8, timestamp '2017-09-05 15:11:15');
insert into t values ('TR3', 'FG', 'GSDFGSG', 10, timestamp '2017-08-31 16:26:04');
insert into t values ('TR2', 'FG', 'GSDFGSG', 2, timestamp '2017-08-31 16:05:39');
insert into t values ('TR1', 'FG', 'GSDFGSG', 2, timestamp '2017-08-30 16:30:16');
insert into t values ('TR5', 'FG', 'GSDFGSG', 3, timestamp '2017-08-31 17:00:00');
Edit:
Add part_no and total columns and group by clause:
select min(id) id, part_no, min(sq) total
from (select t.*,
sum(quantity) over (partition by part_no order by id) sq
from t
where part_no = 'GSDFGSG'
)
where sq >= 8
group by part_no
ID PART_NO TOTAL
--- -------- ----------
TR3 GSDFGSG 14