Hello friends,
I hope someone can help me out with this problem. I don't know how I can implement this calculated column in PowerBI.
Should I use DAX? calculated function? data modelling? should I do this in ETL instead of Power BI?
Please see exhibit A below. 
I have a column (Column3) that needs to be calculated by two other columns from a previous row. Previous row is denoted by smaller value in Column 0
Not only that, the calculated column would restart for each group of Column 0, so previous row actually gets restart whenever column 0 is 1 again. I can add another column to denote each group of rows. (for rows with Column0 1-3)
Any pointers is greatly appreciated! Thank you!
Column 0 | Column 1 | Column2 | Column3 = ( Column 1 + Column 2 ) of previous row Restart previous row value when Column 0 value is 1 |
3 | 60 | 600 | = 50+500 = 550 |
2 | 50 | 500 | = 40 + 400 = 440 |
1 | 40 | 400 |
|
3 | 30 | 300 | = 20+200 = 220 |
2 | 20 | 200 | = 10 + 100 = 110 |
1 | 10 | 100 |
|