Change Table Columns Based on Slicer Selection

[sharmil_28]

I have two table 
1. Fact Main

2. Dim Calendar for Slicer

If slected value is Jan-25 ,
show Val_1 to Val_31 columns in table/matrix visual
If slected value is Feb-25 ,
show Val_1 to Val_29 columns in table/matrix visual
If slected value is June-25 ,
show Val_1 to Val_30 columns in table/matrix visual

Basically what I need to change Table(visual) columns based on Slicer Selection. 
(display of columns depends on the number of days of selected month from the slicer.)
Thank you.

[speedramps]

He @sharmil_28 

It is best practice to ALWAYS ALWAYS ALWAYS use dates and calendars for Power BI date intellegence.

Rather that faff about with date, month or year column as val1, val2, val3 etc.

Dvelopers always mess up on 30/31 day months or leap year calculations when they use the val1, val2, val3.

It is much better to develop and test a good calendar table once and use it always. 

All reports use dates so please learn about calendar tables

Try this ...

Create a calendar table

Calendar = CALENDAR(DATE(2025,1,1), DATE(2025,12,31)) 

Add a Day column

Day = 
FORMAT('Calendar'[Date],"DD")

Add a Period column

Period = 
FORMAT('Calendar'[Date],"Mmm") 
& "-" &
FORMAT('Calendar'[Date],"YY") 

Add a Start of Month column

Start of month = 
STARTOFMONTH('Calendar'[Date])

Sort the Period column by Start of Month

Insert a Date on your fact table if you dont already have a Date column

Create a One to many relationship from the Calendat{Date] to the Fact[Date]

Crate a Total measure

Total = 
SUM(Facts[Value]) + 0

Draw a Matrix visual

Test February

Test June

Test July

Learn more for free about Calndar tables here:-

https://www.youtube.com/watch?v=CJ2y6v4mQZk

Please click thumbs up because I have tried to help.

Then click [accept solution] if it works. (you can see from the screen prints it does works)

Thank you

[sharmil_28]

@speedramps 
Thank you so much for your solution.
I have [Date] column in Fact table but its only contains the 1st date of the month. 

Any thoughts you have would be helpful. Thank you.

[speedramps · Accepted solution]

Hi again @sharmil_28 

Are you saying your fact table looks like this with 31 "val" columns 

If yes then selcet the start of month column in tyeh trasnform menu Unpivot the other columns

Relace the "val" text with nothing and then Change the column data type to a whole numbner 

Add a customer colum to add the start of month and "val" number to get the date

Date.AddDays([Start of month],[Attribute])

Learn more about Power Query here 

https://www.youtube.com/watch?v=i66yyAl5_Jc

All reports use dates, so it is very important that you learn how to convert years, months and days from column values to dates. So you can leaverage Power BI date intelligence. 

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[sharmil_28]

@speedramps 
Hello, 
Apologize for not providing sufficient details earlier. I understand this may have caused confusion. 
Appreciate your help! The solution was exactly what I needed.
I'am greatful for your assistance.
Also thank you for the detailed information about how to post the query.  I'll make sure to be more careful next time.
Thank you!