Calculated Column based on multiple filter criteria

[Anonymous]

Hello,

How to create a calculated column flagging whether or not a particular calendar Week is shared between two calendar months or not (end of month scenario), without considering Saturdays and Sundays.

I want to try with approach of distinct count of Month numbers for a Week - If it is 2, then YES, else NO.

Example:
Week 13 is shared between March and April discounting Sat and Sun, thus Yes is needed.
Week 17 is Not shared between April and May discounting Sat and Sun, thus No is needed.
Table Dim_Date

Date	Week Number	Month Number	Weekday	Calculate_Week shared between months?
04-Apr-21	13	4	Sun	Yes
03-Apr-21	13	4	Sat	Yes
02-Apr-21	13	4	Fri	Yes
01-Apr-21	13	4	Thu	Yes
31-Mar-21	13	3	Wed	Yes
30-Mar-21	13	3	Tue	Yes
29-Mar-21	13	3	Mon	Yes
02-May-21	17	5	Sun	No
01-May-21	17	5	Sat	No
30-Apr-21	17	4	Fri	No
29-Apr-21	17	4	Thu	No
28-Apr-21	17	4	Wed	No
27-Apr-21	17	4	Tue	No
26-Apr-21	17	4	Mon	No

I tried below code but it resulted into "No" for Week 13 above too. It does look fishy to me but unable to fix this. Any help would be great.

Calculate_Week shared between months? = 
IF(
       CALCULATE(
           CALCULATE(DISTINCTCOUNT(Dim_Date[Month Number]), 
                     ALLEXCEPT(Dim_Date,Dim_Date[Week Number])),
            FILTER(Dim_Date,
                   OR( Dim_Date[Weekday] <> "Sun", Dim_Date[Weekday] <> "Sat"))
       )     
 = 2, "Yes", "No"
 )

Thanks

Nirmit

[Anonymous]

Hi @Anonymous 

Many thanks for taking time out to explain this with example. Indeed it should be the inner ALLEXCEPT() removing all other context filters. Though I do need to understand these nuances in more detail!

Regards

Nirmit

[Anonymous]

Hi @Anonymous ,

Based on my test, if you use the following formula to modify your second method, the result is correct.

Column =
VAR _week = [Week Number]

RETURN
    IF (
        CALCULATE (
            CALCULATE (
                DISTINCTCOUNT ( Dim_Date[Month Number] ),
                FILTER ( 'Dim_Date', 'Dim_Date'[Week Number] = _week )
            ),
            FILTER ( Dim_Date, NOT ( Dim_Date[Weekday] IN { "Sun", "Sat" } ) )
        ) = 2,
        "Yes",
        "No"
    )

So I think it could be related to the context with ALLEXCEPT() —— The two groups of expression consider or ignore the filters made on related tables, respectively.As the official document said, ALLEXCEPT() removes all context filters in the table except filters that have been applied to the specified columns.

For more details, please refer to thread:

https://community.powerbi.com/t5/Desktop/Filter-and-Allexcept/td-p/76403

https://www.sqlbi.com/articles/order-of-evaluation-in-calculate-parameters/

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

[Anonymous]

Hi @amitchandak 

Thanks much for quick help. Really appreciate. It works exactly like required.

I used the FILTER syntax you provided and sourrounded it with ALLEXCEPT- this works
But ALLEXCEPT sourrounded by FILTER - this does not work 

Would be very helpful if you could explain a bit on this. Thanks in advance.

This works:

Week shared between months = 
IF(
       CALCULATE(
           CALCULATE
                    ( 
                    DISTINCTCOUNT(Dim_Date[Month Number]), 
                    FILTER(Dim_Date, NOT (Dim_Date[Weekday] IN {"Sun", "Sat"}))
                     ),
                    ALLEXCEPT(Dim_Date,Dim_Date[Week])
                )
 = 2, "Yes", "No"
 )

This does NOT work. (Result of IF is 12 always)

IF(
       CALCULATE(
           CALCULATE
                    ( 
                    DISTINCTCOUNT(Dim_Date[Month Number]), 
                    ALLEXCEPT(Dim_Date,Dim_Date[Week])
                     ),
                   FILTER(Dim_Date, NOT (Dim_Date[Weekday] IN {"Sun", "Sat"}))
                )
 = 2, "Yes", "No"
 )

Thanks

Nirmit

[amitchandak · Accepted solution]

@Anonymous ,

Var _week = [Week]
return
if(calculate(distinctCOUNT(Dim_Date[Month Number]), filter(Dim_Date, Dim_Date[Week] =_week && not( Dim_Date[Weekday] in{"Sun", "Sat"}))) =2, "Yes", "No")