Forum Discussion
Self referencing calculated column (referencing previous row) - Power M help
Good evening,
hope you guys can help me! I inherited an old heavy-hard coded file with various cell references and formulas I am now trying to automate.
I need one last step with my PQ query, I need to add a calculated column that is referencing to the previous row of itself to complete a calculation. ImkeF, I am mentioning you since I have seen a post which you already solved with a very similar issue (https://community.powerbi.com/t5/Desktop/Calculated-column-with-previous-row-referencing-same-calculated/td-p/629974/jump-to/first-unread-message)
Here below an example of what I need to calculate --> AVAILABLE is the calculated column I need (see on the right the calculation)
| PRODUCT ID | ON-ORDER | ON-HAND | AVAILABLE | |
ABC | 31 | 500 | 469 | (ONHAND[i] - ONORDER[i]) |
| ABC | 29 | 500 | 440 | (AVAILABLE[i-1] - ONORDER[i]) |
| ABC | 4 | 500 | 436 | (AVAILABLE[i-1] - ONORDER[i]) |
| DEF | 26 | 780 | 751 | (ONHAND[i] - ONORDER[i]) |
| DEF | 25 | 780 | 726 | (AVAILABLE[i-1] - ONORDER[i]) |
| DEF | 89 | 780 | 637 | (AVAILABLE[i-1] - ONORDER[i]) |
| DEF | 168 | 780 | 469 | (AVAILABLE[i-1] - ONORDER[i]) |
| GHI | 56 | -36 | -92 | (ONHAND[i] - ONORDER[i]) |
| GHI | 56 | -36 | -148 | (AVAILABLE[i-1] - ONORDER[i]) |
| LMN | 348 | 220 | -128 | ..... |
| LMN | 26 | 220 | -154 | ..... |
| LMN | 125 | 220 | -279 | ..... |
Thank you already for the help.
Federico
Hi Federaske ,
Please add an index column in the query editor, and then use DAX to create the following new column:
Column = var on_order= CALCULATE(SUM('Table'[ON-ORDER]),FILTER(ALLEXCEPT('Table','Table'[PRODUCT ID]),EARLIER('Table'[Index])>='Table'[Index])) return 'Table'[ON-HAND]-on_orderBest Regards,
Liang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
3 Replies
- lbendlin
Super User
You must have an index column somewhere. Please include it in your sample data.
V-lianl-msftCommunity Support
Hi Federaske ,
Please add an index column in the query editor, and then use DAX to create the following new column:
Column = var on_order= CALCULATE(SUM('Table'[ON-ORDER]),FILTER(ALLEXCEPT('Table','Table'[PRODUCT ID]),EARLIER('Table'[Index])>='Table'[Index])) return 'Table'[ON-HAND]-on_orderBest Regards,
Liang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.Hi Liang,
thank you very much! Works perfectly.
Thanks again,
Bye,
Federico
