How to get last week value per each category

[NKBI2022]

Hi All..

I want to return the last week value per category. Here are the data and the example:

WeekNo	Value	Category
1	1	A
2	2	A
3	1	A
1	2	B
3	1	B

I want to create a table that shows the selected week value and the n-1 selected week value. I'm currently using this measure:

LastWeekValue = calculate( sum('table'[Value]), FILTER(ALL('table'), 'table'[WeekNo]= SELECTEDVALUE('table'[WeekNo]) - 1))

And here's the result of the measure:

Assuming that the selected week no is 3

Category	SelectedWeekValue	LastSelectedWeekValue
A	1	2
B	1	2

The measure is showing the right sum of value on previous week. However, the value is showing the same value on each category. (Category B shows value = 2, eventhough that it actually has no value on week 2).

Here's the desired output looks like :

Assuming that the selected week no is 3

Category	SelectedWeekValue (week no 3)	LastSelectedWeekValue (week no 2)
A	1	2
B	1	0

Please help me to solve this.

Thank you so much!!!!!

[v-cgao-msft · Accepted solution]

Hi @NKBI2022 ,

Please try like:

LastWeekValue = 
VAR _lastweek = SELECTEDVALUE('Table'[WeekNo]) - 1
VAR _last_week_value = CALCULATE(SUM('Table'[Value]),'Table'[WeekNo]=_lastweek) + 0
RETURN
_last_week_value

Best Regards,
Gao
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly. If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

How to get your questions answered quickly -- How to provide sample data