Count unique values

[Cactus26]

Hi,

I am struggling with creation of the measure which will be recalculated after the filters in report via slicers will be selected.

I was able to get the same effect using calculated columns, however I had to hard code the filters in formulas which I wanted to use.

I need two measures which will calculate from the one column (string):

1. number of unique values but count only those which are available in column just one time

2. number of values which were repeated 3 or more times in column

Let's say, in colum A we store following information:

AA2

AA4

AA4

AA7

AA7

AA7

AA8

AA7

For 1 measure I will get: 2 (because just AA2 and AA8 are unique and not repeated)

For measure 2 I will get:  1 (because just AA7 is repeated 3 or more times)

Thanks a lot!

[Ashish_Mathur]

Hi,

Try this

Measure 1

=COUNTROWS(FILTER(VALUES(Data[Data]),COUNTA([Data])=1))

Measure 2

=COUNTROWS(FILTER(VALUES(Data[Data]),COUNTA([Data])>=3))

[AlbertoFerrari · Accepted solution]

Hi,

Something like this should work (did not test it, writing it blind)

COUNTROWS ( 
    FILTER ( 
        VALUES ( Table[YourColumn] ),
        CALCULATE ( COUNTROWS ( Table ) = 1
     )
)

and 

COUNTROWS ( 
    FILTER ( 
        VALUES ( Table[YourColumn] ),
        CALCULATE ( COUNTROWS ( Table ) >= 3
     )
)

Of course, by playing with the condition of FILTER, you can achievev different results. 


Have fun with DAX!

Alberto Ferrari
http://www.sqlbi.com

[Cactus26]

@AlbertoFerrari 

Wow, it works like a charm! Thank you!!

[Anonymous]

hi @Cactus26,

Does this solve your issue..

Count Measure_1 =if(COUNT(Test[test])<=1,count(Test[test]),blank())

Count Measure_2 =if(COUNT(Test[test])<=3,count(Test[test]),blank())

  I have put your test data in a table name Test & in a column in it name test.

Regards

[Cactus26]

Hi @Anonymous,

Unfortunately it did not work 😕 I am just receving blank as a value.

I have also tried with COUNTA as there are string in this column but the same.

I am out of ideas how it can be solved.

[Anonymous]

HI @Cactus26

  It will work you need to bring both measure & the column on a table visual.

Regards

[Cactus26]

Hi @Anonymous,

I wanted to upload the sample file from PowerBI but is impossible.So, I will put screenshots then, it will be easier to explain.

Raw table:

Test      Country       Week

AA2	A	1
AA4	A	1
AA4	B	1
AA7	B	1
AA7	B	1
AA7	A	1
AA8	A	1
AA7	A	2

Measures:

Measure_1 = if(CALCULATE(COUNTA('Table'[Test])<=1),1,0)

Measure_2 = if(CALCULATE(COUNTA('Table'[Test])>=3),1,0)

Measure_3 = [Measure_2]/[Measure_1]

Basically, I need to create measures which will be dynamically changed after filters in slicers will be applied (week, country and many more not mentioned), so it is why I cannot make it as a calculated column as the values will be changed regardless of the filters. Using mentioned solution by you I am getting something like:

Here no filters where chosen. So I am expecting in Measure_1 for Total: 2 but is 0 and Measure_3 equal 0.5 but is infinity.

Measure_1 has to count the unique values (which has no duplicates) and this measure will be represented as KPI, as one value

Measure_2 has to count the number of values which occured 3 or more times.

Maybe you are right but sill I am not satisifed with the results and perhaps I do not understand it as I am still learning.

Thanks a lot!

[CahabaData]

Your post is a little unclear/confusing to me.  To clarify;

i.e. If the slicer selection is Week 2 - then your Table Visual will display just 1 row AA7 ... and therefore a COUNTROW measure is = 1

is this correct?

[Cactus26]

Hi @CahabaData

Generally I am not interested in showing Table Visual but to visualise one number for each measure not like  break down per each item like I showed in the screenshot.

Let's say when we filter week 2, only item AA7 will be filtered, so measure_1=1 (because AA7 is unique after filter set), measure_2=0(because there is just one item AA7 and for this measure I am interested in items which are repeated 3 or more times) and measure_3=0.

But let presume that we filter data and we have situation where such items are listed: AA2, AA7, AA7, AA7, AA7, AA3, then measure_1=2 (because AA2 and AA3 are unique), measure_2=1(becasue AA7 is repeated 4 times) and measure_3=1/2

I was thinking if we should create some variables to make it works correctly.

In calculated column I could do like this but unfortunatelty those numbers are static in column:

IF(
CALCULATE(
COUNTA('Table'[Test]);
FILTER('Table'; 'Table'[Test] = EARLIER('Table'[Test]))
)>=3;
1;
0
)

I hope that it more clear now.

[Cactus26]

@Anonymous

Is there a way to get one number of your proposition per each measure? It works just when it has reference to items in table but I need the total count for measure_1 and measure_2

Count Measure_1 =if(COUNT(Test[test])<=1,count(Test[test]),blank())

Count Measure_2 =if(COUNT(Test[test])<=3,count(Test[test]),blank())

I tried like this:

Measure_1 = SUMX('Table';IF(CALCULATE(COUNTA('Table'[Test]); FILTER('Table';COUNTA('Table'[Test])<=1))=0;0;1)) but it does not sum