Find value from column X corresponding the max value in column y

[user555]

I have a small problem that I cant solve in efficient way. I want to create a new column "lastDatesales" which has "sum of sales "corresponding to the last purchase dates sales a company has. For example, company "a":s last purchase date was 10.1.2019, so I want to get the corresponding sales from that date to each row the company has.

My current solution is: 

lastDatesales = maxx(filter(Sheet1;Sheet1[company]=earlier(Sheet1[company]));if(Sheet1[date]=maxx(filter(Sheet1;Sheet1[company]=earlier(Sheet1[company]));Sheet1[date]);Sheet1[sales];0))

date	sales	company	lastDatesales (correct answer)
1.1.2019	100	a	200
10.1.2019	200	a	200
1.1.2018	300	b	600
15.1.2018	600	b	600

[v-juanli-msft · Accepted solution]

Hi @user555 

Modify az38's solution as below, then it can use to create a column

lastDatesales = 
var _lastDate = calculate(MAX(Sheet1[date]),ALLEXCEPT(Sheet1,Sheet1[company]))
return
LOOKUPVALUE(Sheet1[sales],Sheet1[company],Sheet1[company],Sheet1[date],_lastDate)

Measure may perform quicker than column.

Check the performance under View->Performance Analyzer.

Best Regards
Maggie
Community Support Team _ Maggie Li
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[user555]

Thanks a lot az38 and Maggie! Both answers were really helpful.

[az38]

hi @user555 

try a measure

lastDatesales = 
var _lastDate = calculate(MAX(Sheet1[date]);ALLEXCEPT(Sheet1;Sheet1[company]))
return
LOOKUPVALUE(Sheet1[sales];Sheet1[company];SELECTEDVALUE(Sheet1[company]);Sheet1[date];_lastDate)

do not hesitate to give a kudo to useful posts and mark solutions as solution