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Frequent Visitor

## DAX calculation

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 rowRestart 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
1 ACCEPTED SOLUTION
Community Champion

@quyen103

Add an Index Column in the Query Editor as shown in the image below...

Then create this COLUMN

```Column 3 =
VAR CurIndex = 'Table'[Index]
RETURN
IF (
'Table'[Column0] = 1,
BLANK (),
CALCULATE (
SUM ( 'Table'[Column1] ) + SUM ( 'Table'[Column2] ),
FILTER ( 'Table', 'Table'[Index] = CurIndex + 1 )
)
)```

Hope this helps!

3 REPLIES 3
Community Champion

@quyen103

Add an Index Column in the Query Editor as shown in the image below...

Then create this COLUMN

```Column 3 =
VAR CurIndex = 'Table'[Index]
RETURN
IF (
'Table'[Column0] = 1,
BLANK (),
CALCULATE (
SUM ( 'Table'[Column1] ) + SUM ( 'Table'[Column2] ),
FILTER ( 'Table', 'Table'[Index] = CurIndex + 1 )
)
)```

Hope this helps!

Frequent Visitor

Sean,

Thank you so much my friend, super contributor Sean 🙂

I really appreciate the video and code response.  Can't get any clearer than this.. !!

Microsoft

Hi @quyen103,

Please mark the right reply as answer. which will help more people to find solution.

Best Regards,
Angelia

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