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!!!!!

[Anonymous · 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

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