Calculate the difference of values in a column within a same value in another column

[renanc]

Hi everybody,

I am trying to calculate the difference of the KM between the checklists, for the same car plate (DescPlaca), and I am trying to do the Context in the same way I would do for DATEDIFF, but for some reason it does not work. Can anybody help me with this, please?
I wanna calculate the "Digite a KM" value less the Previous checklist "Digite a KM" value, for this, I have to use IdChecklist, so the IdChecklist for the first term has to be bigger than IdChecklist for the second term, and DescPlaca has to be equal.
I am trying to use the following dax. can anybody spot what is wrong, please?

Diferenca KM =

CALCULATE(

FIRSTNONBLANK(fChecklists[IdChecklist],0),

FILTER(

ALL(fChecklists),

fChecklists[IdChecklist] > EARLIER([IdChecklist])

&& fChecklists[DescPlaca]=EARLIER([DescPlaca])

&& fChecklists[DtCadastro] >= EARLIER([DtCadastro])

&& fChecklists[IdQuestionario] = EARLIER([IdQuestionario])

)

)

 

[renanc]

Hi @amitchandak, I was trying to create as a measure, now I tried to create anew column.
In the var _min calculation, the Dax recognizes the columns DescPlaca and IdQuestionario, but in the calculation in the return, these columns are not recognized. The following mesage appears: 

Parameter is not the correct type.

Cannot find name '[DescPlaca]'

[tamerj1]

@renanc 
You missed a comma "," after min([Digite a KM])

[amitchandak]

@renanc , A new column like

Diferenca KM =
var _min =
CALCULATE(
FIRSTNONBLANK(fChecklists[IdChecklist],0),
FILTER(
ALL(fChecklists),
fChecklists[IdChecklist] > EARLIER([IdChecklist])
&& fChecklists[DescPlaca]=EARLIER([DescPlaca])
&& fChecklists[DtCadastro] >= EARLIER([DtCadastro])
&& fChecklists[IdQuestionario] = EARLIER([IdQuestionario])
)
)
return
CALCULATE(
min([Digite a KM])
FILTER(
ALL(fChecklists),
fChecklists[IdChecklist] = _min
&& fChecklists[DescPlaca]=EARLIER([DescPlaca])
&& fChecklists[IdQuestionario] = EARLIER([IdQuestionario])
)
) - [Digite a KM]