Cumulative sum over partition by specific column

[Lenastray]

Hello:
I’m struggling with a method for solving a partition problem in Dax.

I have 2 tables. Table A has a column that I want to calculate the cumulative total. Table B is a Calendar table that has a huge number of columns (date, day, month, year, isholiday, isweekend, ...)

I need to calculate the cumulative total from the specific column from Table A, partitioning by an specific column from column B. This columns marks specific events over time by an ID.


Thanks to all in advance

[JamesPower]

Sounds like you're trying to do something like: https://community.powerbi.com/t5/DAX-Commands-and-Tips/Cumulative-sum-over-partition-by-specific-col...

And otherwise https://stackoverflow.com/questions/49322212/dax-equivalent-to-t-sql-avg-overpartition-by

with 'sum' instead of 'avg'.

[Lenastray]

Please help : (

[Lenastray]

To be more specific. Table B is a dimension and table A is a fact table. Both are related in the model by the equivalent date column.