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Anonymous's avatar
Anonymous
Not applicable
6 years ago
Solved

Power BI Date Range Lookup

I have below two tables. I need to lookup on my date range table and fetch the Interest rate if the business date lies between the from date and to date. The expected output looks like below....
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  • Greg_Deckler's avatar
    Greg_Deckler
    6 years ago

    Generally I do something like:

     

    Interest Rate Column =
  VAR __Date = 'Table1'[Business Date]
  VAR __ID = 'Table1'[Loan ID]
  VAR __Rate = 
    MAXX(
       FILTER(
         ALL('Table2'),
         'Table2'[Loan ID] = __ID && 
           'Table2'[From Date] <= __Date &&
             'Table2'[To Date] >= __Date
       ),
       [Interest Rate]
    )
RETURN
  __Rate

     

Greg_Deckler's avatar
Greg_Deckler
Community Champion
4 years ago

JulieP I would recommend starting a new thread in the Power Query forum and tagging people like ImkeF edhans I don't know the Power Query way to do that, just the DAX way.

JulieP's avatar
JulieP
Frequent Visitor
4 years ago

Hi, Greg  Thank you for the referral.

 

For my learning, how would you do this in DAX?

  • edhans's avatar
    edhans
    Community Champion
    4 years ago

    I answered your question in the PQ forum. DAX would be relatively simple. This is from memory:

     

    A Lookup Measure =
VAR varCurrentDate = ThisTable[EndDate]
VAR Result =
    MAXX (
        FILTER (
            TheLookUpTable,
            TheLookupTable[StartDate] <= varCurrentDate
                && TheLookupTable[EndDate] >= varCurrentDate
        ),
        TheLookupTable[TermCode]
    )
RETURN
    Result

     

    NOt super efficient. You should never filter an entire table, but the lookup table is probably pretty small though. Greg_Deckler could likely do it more efficiently in DAX though than I can.

    • JulieP's avatar
      JulieP
      Frequent Visitor
      4 years ago

      Appreciate the input! 

       

      Have a great day! 🙂