topic Re: Distinctcount on two filter values in DAX Commands and Tips

Distinctcount on two filter values

YBavré — Wed, 19 Oct 2022 08:42:54 GMT

Hi, I wonder if someone could help me with this issue.

I have the folowing table:

Enterprise_Nbr	LOB (Line_of_business)
1	A
2	B
3	B
1	B
4	C
5	B
2	B
1	C

I need to count the number of distinct Enterprise_Nbr which have LOB "A" and "B"

When I use the formula

X= CALCULATE(DISTINCTCOUNT(ENHANCED_CKI_CUSTOMER[Enterprise_Nbr]), FILTER(ENHANCED_CKI_PRODUCTS, ENHANCED_CKI_PRODUCTS[LOB] = "A" || ENHANCED_CKI_PRODUCTS[LOB] = "B"))

it returns X = 4 (being Enterprise_Nbrs 1, 2 3 and 5)

In fact I expect to get X = 1 (being just Enterprise_Nbr 1, as it is the only one that has LOB "A" and "B"

How ca I solve this?

Thanks for the help.

Re: Distinctcount on two filter values

tamerj1 — Wed, 19 Oct 2022 09:49:07 GMT

Hi YBavré

please try

X = COUNTROWS ( FILTER ( VALUES ( ENHANCED_CKI_CUSTOMER[Enterprise_Nbr] ), COUNTROWS ( INTERSECT ( CALCULATETABLE ( VALUES ( ENHANCED_CKI_PRODUCTS[LOB] ) ), { "A", "B" } ) ) = 2 ) )

Re: Distinctcount on two filter values

speedramps — Wed, 19 Oct 2022 10:26:18 GMT

Try this ...

Has A and B =

Var tempA =

CALCULATE(

ISEMPTY('Table'),

'Table'[LOB (Line_of_business)] = "A"

)

Var tempB =

CALCULATE(

ISEMPTY('Table'),

'Table'[LOB (Line_of_business)] = "B"

)

RETURN

INT(NOT(tempA || tempB) )

Your answer =

CALCULATE(

DISTINCTCOUNT('Table'[Enterprise_Nbr]),

FILTER('Table',[Has A and B] =1))

Thanks for reaching out for help.

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Re: Distinctcount on two filter values

speedramps — Wed, 19 Oct 2022 10:32:54 GMT

Thanks Tamerj1 for your suggestion,

In this case

ISEMPTY('Table') is more efficient than COUNTROWS because it just requires one attempted read for A and one for B.

Whereas COUNTROWS will have to scan all the records for the context.

Thanks.

Re: Distinctcount on two filter values

tamerj1 — Wed, 19 Oct 2022 11:02:23 GMT

speedramps

Counting the rows of a table of maximum two rows in not significant

Re: Distinctcount on two filter values

speedramps — Wed, 19 Oct 2022 11:17:52 GMT

Thanks Tamerj1

I dont mind other Super Super offering a better solution but ISEMPTY is the the best practice for cheching if a scenario does or does not exist.

Please dont assume there is just one record per enterprise and teach newbees to use COUNTROWS.

The clue is the command names !

ISEMPTY is a boolean checks if the table expression is empty

where as COUNTROWS is computative.

Please use ISEMPTY for checking and COUNTROWS for computations.

No, if, buts or any excuses ... ISEMPTY is the better solution. OK? 😀😀😀

Re: Distinctcount on two filter values

YBavré — Thu, 20 Oct 2022 09:33:00 GMT

Hi speedramps , thank you for trying helping me with this issue. However, it does not seem to be functionning when I aplpy it on my dataset.

I'm totally new on this forum, so I do not know yet all the rules, but I keep your tips in mind.

Re: Distinctcount on two filter values

YBavré — Thu, 20 Oct 2022 09:34:01 GMT

tamerj1 thnaks a lot: it does the job and I get the resut I was looking for.

Best regards.

Re: Distinctcount on two filter values

tamerj1 — Thu, 20 Oct 2022 11:07:21 GMT

YBavré
As per speedramps recommendation, the following should perform faster.

X = COUNTROWS ( FILTER ( VALUES ( ENHANCED_CKI_CUSTOMER[Enterprise_Nbr] ), ISEMPTY( EXCEPT ( { "A", "B" }, CALCULATETABLE ( VALUES ( ENHANCED_CKI_PRODUCTS[LOB] ) ) ) ) ) )

Re: Distinctcount on two filter values

YBavré — Thu, 20 Oct 2022 10:11:36 GMT

Hi tamerj1 , I get the error message "a table of multiple values was supplied where a single value was expected" when I run your latest measure...

Re: Distinctcount on two filter values

tamerj1 — Thu, 20 Oct 2022 11:08:41 GMT

YBavré
Sorry I should have used ISEPTY not ISBLANK. Updated in the reply

Re: Distinctcount on two filter values

YBavré — Thu, 20 Oct 2022 12:15:09 GMT

Yes, that does it, thanks again!