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Anonymous's avatar
Anonymous
Not applicable
4 years ago
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using index columns to combine data from two tables

I need to combine data from two tables. Table A looks like this where Index Start and Index Stop map to Index in Table B.  Table B looks like this. The Index column lists only the values that...
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  • Anonymous's avatar
    Anonymous
    4 years ago

    Hi Anonymous ,

     

    I think you can add a custom column in Table A by this code in Power Query Editor.

    Index =

{Number.From([Index Start])
..
if 
[Index End] = null 
then
List.Max(#"Table B"[Index]) 
else 
Number.From([Index End])}

     

    Then expand Index in Table A.

    And then merge Table A and Table B by Index columns.

    For reference: merge-queries-overview

     

    Best Regards,
    Rico Zhou

     

    If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

     

     

KratosBI's avatar
KratosBI
Icon for Advocate II rankAdvocate II
4 years ago

You will need to pivot table A to then join to table B, so the results look like this:

 

User_ID, Index

4383961,3

4383961,4

4383961,5

4383961,6

4383961,7

4383961,8

4383961,9

 

I have seen this done in Power Query, but my Google-Foo failed me for an example.

 

Your biggest challenge will be getting the right # of records to fill in for table A. 

 

After you get the right num of columns, go to 'column by example' to figure it out how to fill in the missing values for the index. 

Power BI- Column From Example. In this article, we learn about the… | by Vaishali Goilkar | Medium

 

I hope this helps. Good luck.