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ryan_smith_ww
Frequent Visitor

DAX in 1st table for data in the third table. (SQL query given. Looking for Equivalent DAX)

Hi,

 

I've got three tables in PowerBI TableA, TableB and TableC. Relationship is one-to-many in the order TableA --> TableB --> TableC.

I want to have a measure in tableA that will use rows of TableC

I'm trying to get DAX equivalent of the below SQL. Any help will be highly appreciated as I haven't had much success.

 

 

 

DECLARE @CurrentPeriodStartDate DATE = DATEADD(DAY,(DATEPART(DAY,DATEADD(MONTH,-1,GETDATE()))*-1)+1,DATEADD(MONTH,-1,GETDATE())) -- 2021-05-01

DECLARE @PeriodStartDate DATE = DATEADD(DAY,(DATEPART(DAY,DATEADD(MONTH,-4,GETDATE()))*-1)+1,DATEADD(MONTH,-4,GETDATE())) -- 2021-02-01

DECLARE @PeriodEndDate DATE = DATEAdd(month,2,@PeriodStartDate) -- 2021-04-01


DECLARE @QuarterTotal INT =
(
select COUNT(*) from TableA a
inner join TableB b
on a.Id = b.TableAId
inner join TableC c
on b.Id = c.TableBId
where c.PeriodStartDate between @PeriodStartDate and @PeriodEndDate
)

DECLARE @CurrentPeriodTotal INT =
(
select COUNT(*) from TableA a
inner join TableB b
on a.Id = b.TableAId
inner join TableC c
on b.Id = c.TableBId
where c.PeriodStartDate = @CurrentPeriodStartDate

)


Measure in TableA = SELECT CASE WHEN @QuarterTotal = 3 AND @CurrentPeriodTotal = 1 THEN 0
ELSE 1 END

 

 

 

 

1 ACCEPTED SOLUTION
wdx223_Daniel
Super User
Super User

with the relationship, just simply use RELATEDTABLE to get rows of TableC

View solution in original post

6 REPLIES 6
wdx223_Daniel
Super User
Super User

with the relationship, just simply use RELATEDTABLE to get rows of TableC

Thanks. I got the solution using RELATEDTABLE.

amitchandak
Super User
Super User

@ryan_smith_ww , TableA, TableB, and TableC should in power bi on keys.

 

You need to have date tables. 2 are needed here. One joined with periodstartdate of Table3

 

refer this video, how you can get two-period filters 

How to use two Date/Period slicers :https://www.youtube.com/watch?v=WSeZr_-MiTg

Thanks @amitchandak . TableA, TableB and TableC are in PowerBI with relationships defined between them. Unfortunately I'm still not clear on how do I convert the SQL shared above to equivalent DAX for the measure.

@ryan_smith_ww , Please share relationship digram, based on that I suggest

@amitchandak Here's the basic diagram for the Three tables. Thanks for your help.

ryan_smith_ww_0-1624930514407.png

 

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