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wes-shen-poal's avatar
wes-shen-poal
Icon for Helper III rankHelper III
8 years ago
Solved

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

 

Need Help
  • Phil_Seamark's avatar
    Phil_Seamark
    8 years ago

    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))

3 Replies

  • Phil_Seamark's avatar
    Phil_Seamark
    Icon for Microsoft Employee rankMicrosoft Employee
    8 years ago

    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))
    • Anonymous's avatar
      Anonymous
      Not applicable
      7 years ago

      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?