I'm trying to write a query that will calculate remaining total points for each day when some points have been completed.
Story points completed in a day
So if my total is 100 points, it should show 99, 97.5, 94.5 as I want to use it in a burndown graph in Power BI.
If I use LAG, it will calculate the remaining for each row separately, instead of using 'updated' total from previous row.
Also - for rest of the days with no change in points it should show most recent remaining total.
Any ideas?
You can use SUM() OVER window function:
With MyTbl as (
select *
from (values
('2022-06-08', 1.0)
,('2022-06-13', 1.5)
,('2022-06-14', 3.0)
) T(Created, StoryPoints)
)
select
M.*,
RemainingPoints=100-SUM(StoryPoints) over (order by Created rows between unbounded preceding and current row)
from MyTbl M