how to calculate with specific filter

[alson2002]

Hello Team,

I tried to get the previous row value of column "P" based on column "Year" with below DAX to add NEW column "Previous_P",

Statistic Group ID	Year	P
112042	2021	0
112042	2022	0
112042	2023	0
112042	2024	164.74
112042	2025	159.8
112042	2026	155.01
112042	2027	150.36
112042	2028	145.85
137165	2021	0
137165	2022	0
137165	2023	0
137165	2024	0
137165	2025	8525.5
137165	2026	8270.5
137165	2027	8024
137165	2028	7862.5

Previous_P = SUMX(FILTER(Sheet1,Sheet1[Year]=EARLIER(Sheet1[Year])-1),Sheet1[P])

after applying above DAX, I could get the below result:

but what I want is to get "previous_P" with group of different value of "Statistic Group ID".

I tried to use DAX as below, but could not get the expected data:

Previous_P = 
CALCULATE(
SUMX('Sheet1',Sheet1[P]),
FILTER(Sheet1,Sheet1[Year]=(Sheet1[Year])-1),ALLEXCEPT(Sheet1,Sheet1[Statistic Group ID])
)

Could you support to propose how I can get the expected data?

Thank you!

[amitchandak · Accepted solution]

@alson2002 , Try like 

Previous_P = SUMX(FILTER(Sheet1,Sheet1[Year]=EARLIER(Sheet1[Year])-1 && Sheet1[Statistic Group ID] =  earlier(Sheet1[Statistic Group ID] ) ),Sheet1[P])

[alson2002]

Great, thank you!!!