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Anonymous's avatar
Anonymous
Not applicable
8 years ago
Solved

Subtracting Dates within Two Different Tables

Hello,

 

 

I have a report I'm working on using DirectQuery. I'd like to subtract the difference in two dates that reside in two tables but based off a variable in one of the tables.

 

So, we have a table for Equipment and a table for SCalls. I need to find the difference in the Equipment Create Date and the SCall Date for when the SCall Type is a certain value.

 

Can I do this in DirectQuery?

 

Thanks,

Michelle

  • Anonymous's avatar
    Anonymous
    8 years ago

    Anonymous,

    Create similar measures as below. If the DAX don't help, please share dummy data of your tables.

    Measure = CALCULATE(max(SCCalls[Create Date]),FILTER(SCCalls,SCCalls[Scall Type]="test2"))
    Difference = DATEDIFF(MAX(SCEquipments[Create Date]),SCEquipments[Measure],DAY)



    Regards,
    Lydia

  • Anonymous's avatar
    Anonymous
    8 years ago

    Anonymous,

    What if the type of CallTypeID? If it is numerical type, change your DAX to the following:

    Measure= CALCULATE(MAX(SCCalls[CreateDate]), FILTER(SCCalls, SCCalls[CallTypeID]=55))

    Regards,
    Lydia

  • Anonymous's avatar
    Anonymous
    8 years ago

    Anonymous,

    Right-click on your table , then select "New Measure" and apply your DAX.

    Regards,
    Lydia

11 Replies

  • Anonymous's avatar
    Anonymous
    Not applicable
    8 years ago

    Anonymous,

    Is there any relationship between the Equipment table and SCalls table?

    You should be able to use DAX or Power BI query code to achieve the above requirement, please share dummy data of the two tables and post expected result so that we can provide you appropriate DAX formula or Power Query code.

    Regards,
    Lydia

    • Anonymous's avatar
      Anonymous
      Not applicable
      8 years ago

      Anonymous,

       

      Yes, they are related by EquipmentID field. The formula I'm using is:

       

      VALUE(DATEDIFF(SCEquipments[CreateDate],SCCalls[CreateDate],DAY))

       

      The error it's producing is: A single value for column "CreateDate" in table "SCCalls" cannot be determined. This can happen when a measure formula refers to a column that contains many values without specifying an aggregation such as min, max, count, or sum to get a single result.

       

      The issue is that each equipment can have multiple service calls. I'd like to subtract the dates from every service call and then filter the calls down to what I'm looking for but it seems I have to filter within the formula instead.

      • Anonymous's avatar
        Anonymous
        Not applicable
        8 years ago

        Anonymous,

        Create similar measures as below. If the DAX don't help, please share dummy data of your tables.

        Measure = CALCULATE(max(SCCalls[Create Date]),FILTER(SCCalls,SCCalls[Scall Type]="test2"))
        Difference = DATEDIFF(MAX(SCEquipments[Create Date]),SCEquipments[Measure],DAY)



        Regards,
        Lydia

    • KR300's avatar
      KR300
      Helper III
      3 years ago

      I have 2 tables 
      AA tables has                                                 BB table has
      ArrivalDateTime                                             EventDateTime
      10/15/2022 07:46:36 PM                               10/15/2022 07:46:36 PM 
      10/15/2022  11:49:23 AM                               10/15/2022  11:52:23 PM

      10/15/2022 10:43:04 PM                               10/15/2022 10:54:04 PM

      10/15/2022 11:38:45 PM                               10/16/2022 00:01:45 PM

      10/15/2022 10:49:45 PM                               10/15/2022 11:01:45 PM
      10/15/2022 11:51:45 PM                               10/16/2022 00:10:45 PM

      can we do time difference calculations like this ( if we have Common column which has Many to Many Relation) ( whatif we have Many to One Reation ).

      I have one more tables which has EndDateTime
      can we lookup these columns into main tables?