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AvPowerBI's avatar
AvPowerBI
Post Patron
6 years ago
Solved

How to write similar DAX query as per Subquery in SQL Server

Hi,   How would I write a smilar DAX query based on the below T-SQL query:   SELECT a.CustomerName ,SUM(a.AvailableFlag) AS AvailableDays FROM ( SELECT DISTINCT ec.CalendarKey ,ec.Ava...
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  • HotChilli's avatar
    HotChilli
    6 years ago

    Repeating values like this are generally indicative of a relationship issue.

    Here the Visits table can't filter the PersonCalendar due to the direction of the relationship.

    Solutions : change the direction to 'bidirectional' between Visits and PersonCalendar . Will work but may cause relationship problems for other results

    OR

    rework the data model. This would depend upon what you are trying to report on

    OR

    use CROSSFILTER to filter the PersonCalendar for just this measure e.g.

    FiltAvailDays = CALCULATE([AvailableDays], CROSSFILTER(PersonCalendar[PersonIdDateKey], Visits[PersonIdDateKey], Both))

v-yingjl's avatar
v-yingjl
Community Support
6 years ago

Hi AvPowerBI ,

I have tried but not certain:

table =
VAR tab =
    CALCULATETABLE (
        VALUES ( ec[calendarkey] ),
        VALUES ( ec[availableflag] ),
        VALUES ( c[customername] ),
        FILTER (
            CROSSJOIN ( ec, b ),
            ec[db] = v[db]
                && ec[personid] = v[personid]
                && ec[personday] = FORMAT ( v[arrivedttm], "General Date" )
        ),
        FILTER ( CROSSJOIN ( v, c ), v[db] = c[db] && v[callno] = c[callno] ),
        OR ( YEAR ( v[arrivedttm] ) = 2019, YEAR ( v[arrivedttm] ) = 2020 )
            && ec[db] = 'UK'
    )
RETURN
    SUMMARIZE (
        tab,
        'c'[customername],
        "AvailableDays", SUM ( 'ec'[availableflag] )
    )

 

Refer the following articles:

  1. from-sql-to-dax-projection 
  2. from-sql-to-dax-joining-tables/ 
  3. from-sql-to-dax-in-and-exists/ 
  4. from-sql-to-dax-grouping-data/ 
  5. from-sql-to-dax-filtering-data/ 

 

Best Regards,
Yingjie Li

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

AvPowerBI's avatar
AvPowerBI
Post Patron
6 years ago

Hi V-yingl,

 

Thanks for your help so far, I've tried the way you have mentioned but was having issues implenting it and didn't realise it would be that complex the DAx query to get the result I wanted.

I have therefore provided an example and added the spreadsheet and pbix file on One Drive, you will see the results of what I want from the oneshare link below

 

https://1drv.ms/u/s!Aknl2UdxdHn0cTzGDcZPqkEDXcI?e=KXvDVU 

 

 

 

Wish to have the below Results, when the Dimension is CustomerName but it keeps repeating the same value of 6

 

 

Thanks

 

  • AvPowerBI's avatar
    AvPowerBI
    Post Patron
    6 years ago

    Wish to have the below Results, when the Dimension is CustomerName but it keeps repeating the same value of 6

     

    • HotChilli's avatar
      HotChilli
      Community Champion
      6 years ago

      Repeating values like this are generally indicative of a relationship issue.

      Here the Visits table can't filter the PersonCalendar due to the direction of the relationship.

      Solutions : change the direction to 'bidirectional' between Visits and PersonCalendar . Will work but may cause relationship problems for other results

      OR

      rework the data model. This would depend upon what you are trying to report on

      OR

      use CROSSFILTER to filter the PersonCalendar for just this measure e.g.

      FiltAvailDays = CALCULATE([AvailableDays], CROSSFILTER(PersonCalendar[PersonIdDateKey], Visits[PersonIdDateKey], Both))

      • AvPowerBI's avatar
        AvPowerBI
        Post Patron
        6 years ago

        Thanks HotChilli,

        I will have a look at these DAX functions you have mentoned, just wanted to check was you able to access the OneDrive folder I mentioned on the above post?

         

        I am currently in a transition from QlikView to Power BI, where Qlikview had a function called Cyclic which you could cycle though different Dimensions and it would automatically work out the value for you, not having the same luck in Power BI I'm afraid.