Oracle SQL - Running Sum based on group by and condition - sql

Question

I have table that looks like
ID SEQ LABEL COUNT
1 1 0 3
1 2 0 2
1 3 0 6
1 4 1 2
1 5 0 3
1 6 0 5
2 1 0 2
2 2 1 1
2 3 0 3
I would like to create a column called running_count. It calculates cumulative sum of the column count till the Label is 1 and then reset and start cumulative sum again.
Expected Output:
ID SEQ LABEL1 COUNT1 RUNNING_COUNT
1 1 0 3 3
1 2 0 2 5
1 3 0 6 14
1 4 1 2 16
1 5 0 3 3
1 6 0 5 8
2 1 0 2 2
2 2 1 1 3
2 3 0 3 3
I tried the following query
SELECT A.*, SUM(COUNT1) over (partition by ID,LABEL1 order by SEQ) as RUNNING_COUNT FROM TABLE_1 A
The problem here is that the cumulative sum stops in previous row(Seq) for Label = 1. I need to get the running sum till Label = 1 for Each ID based on Seq.
The Wrong Output I am getting
ID SEQ LABEL1 COUNT1 RUNNING_COUNT
1 1 0 3 3
1 2 0 2 5
1 3 0 6 14
1 4 1 2 2
1 5 0 3 3
1 6 0 5 8
2 1 0 2 2
2 2 1 1 1
2 3 0 3 3

Answer 1

You could make a first window sum() to define the groups, then use it as partition for the outer query:
select
t.*,
sum(count1) over(partition by id, grp order by seq) running_count
from (
select
t.*,
sum(label) over(partition by id order by seq desc) grp
from mytable t
) t
Demo on DB Fiddle:
ID | SEQ | LABEL | COUNT1 | GRP | RUNNING_COUNT
-: | --: | ----: | -----: | --: | ------------:
1 | 1 | 0 | 3 | 1 | 3
1 | 2 | 0 | 2 | 1 | 5
1 | 3 | 0 | 6 | 1 | 11
1 | 4 | 1 | 2 | 1 | 13
1 | 5 | 0 | 3 | 0 | 3
1 | 6 | 0 | 5 | 0 | 8
2 | 1 | 0 | 2 | 1 | 2
2 | 2 | 1 | 1 | 1 | 3
2 | 3 | 0 | 3 | 0 | 3