Generate number series based on other column number first number change

[THENNA_41]

I want Generate Number based on ther other column first number 1 chanage . attached sample input Data for reference 

Table 

task  task number
dd         1
ww        2
qw        3
ty         4
yu        5

if Number 1 changed to 2 order output look like

task task number calcaulted column
dd             2               2
ww           2                3
qw           3                4
ty          4                   5
yu        5                    6

if Number 1 changed to 3 order output look like

task task number calcaulted column
dd         3                       3
ww       2                        4
qw      3                        5
ty       4                        6
yu       5                        7

if Number 1 changed to 4 order output look like

task      task number       calcaulted column
dd           4                             4
ww          2                             5
qw         3                              6
ty          4                              7
yu        5                              8.

attached Sample Data Sample  

Thanks in advance . Looking For support

[v-zhangti · Accepted solution]

Hi, @THENNA_41 

You can try the following methods.

Column = 
Var _first=CALCULATE(MAX('Table'[task number]),FILTER('Table',[Index]=1))
Return
IF([Index]=1,[task number],CALCULATE(COUNT('Table'[task]),FILTER('Table',[Index]<EARLIER('Table'[Index])))+_first)

Is this the result you expect?

Best Regards,

Community Support Team _Charlotte

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[wdx223_Daniel]

CalculatedColumn=VAR _start=MAXX(TOPN(Table,Table[task],ASC),Table[task number]) RETURN COUNTROWS(FILTER(Table,Table[task]<EARLIER(Table[task])))+_start

[THENNA_41]

 I got Error  cannot  find the type  task priority