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wes-shen-poal
Helper III
Helper III

days between previous date in a column based on condition of another column

Hi there,

 

I would like to create a new column, called Days_between_visits which calculates the number of days between a date in the ATA (Actual Time of Arrival) column and a previous date also in the ATA column, for each vessel in the VesselName column

 

For the first date of each vessel, Days_between_visits would be null as there is not previous date to calculate the difference with.

 

Is this possible? If so, please kindly assist with the DAX formula required the calculated column

 

Thanks,
Wes

 

Capture.JPG

1 ACCEPTED SOLUTION
Phil_Seamark
Employee
Employee

HI @wes-shen-poal

 

I think this calculated column might be close

 

New Column = 
VAR LastVisit = MAXX(
            FILTER(
                'Table',
                'Table'[VesselName] = EARLIER('Table'[VesselName]) && 
                'Table'[ATA] < EARLIER('Table'[ATA])),'Table'[ATA])
RETURN IF(LastVisit <> BLANK(),INT('Table'[ATA] - LastVisit))

To learn more about DAX visit : aka.ms/practicalDAX

Proud to be a Datanaut!

View solution in original post

3 REPLIES 3
Phil_Seamark
Employee
Employee

HI @wes-shen-poal

 

I think this calculated column might be close

 

New Column = 
VAR LastVisit = MAXX(
            FILTER(
                'Table',
                'Table'[VesselName] = EARLIER('Table'[VesselName]) && 
                'Table'[ATA] < EARLIER('Table'[ATA])),'Table'[ATA])
RETURN IF(LastVisit <> BLANK(),INT('Table'[ATA] - LastVisit))

To learn more about DAX visit : aka.ms/practicalDAX

Proud to be a Datanaut!

Anonymous
Not applicable

@Phil_Seamark I found this solution very helpful, but I had 2 rows that did not return a value that should have. Do you know why this might of happened?

Hi @Phil_Seamark

 

This is perfect. Thank you so much for your help.

 

Wes

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