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mcraven1845's avatar
mcraven1845
Frequent Visitor
7 years ago
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convert excel formula to powerbi function - calc start date from end date - duration (D/W/M/Y)

  I need to check the duration to determine if it is days/weeks/months/years and then do a different forumla to get the start date.  I can do this in excel but I don't know what reserve words ...
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  • mcraven1845's avatar
    mcraven1845
    7 years ago

    Thank you for replying... I figure out a way first using the DAX side then I went back to the power query editor and created a function to add the new column with the desired results.  Going back and forth between syntax is keeping me on my toes.  

     

    Below is the function I created that is working.

     

    let StartUpgradeDate = (DurTime,DurCnt,UpgradeRpDate) => if DurTime="day" or DurTime="days" then
                                       Date.AddDays(UpgradeRpDate, (DurCnt*-1))
                               else if DurTime="week" or DurTime="weeks" then
                                       Date.AddWeeks(UpgradeRpDate, (DurCnt*-1))
                               else if DurTime="month" or DurTime="months" then
                                      Date.AddMonths(UpgradeRpDate, (DurCnt*-1))
                               else if DurTime="year" or DurTime="years" then
                                      Date.AddYears(UpgradeRpDate, (DurCnt*-1))
                               else ""
    in StartUpgradeDate

v-yuta-msft's avatar
v-yuta-msft
Icon for Community Support rankCommunity Support
7 years ago

mcraven1845 ,

 

In DAX, LOOKUPVALUE() is similar to VLOOPUP(), in addtion, I haven't found any reference about CALCWEEK(), CALCMONTH() and CALCYEAR(), however, you may refer to the time intelligence functions here.

 

Community Support Team _ Jimmy Tao

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

mcraven1845's avatar
mcraven1845
Frequent Visitor
7 years ago

Thank you for replying... I figure out a way first using the DAX side then I went back to the power query editor and created a function to add the new column with the desired results.  Going back and forth between syntax is keeping me on my toes.  

 

Below is the function I created that is working.

 

let StartUpgradeDate = (DurTime,DurCnt,UpgradeRpDate) => if DurTime="day" or DurTime="days" then
                                   Date.AddDays(UpgradeRpDate, (DurCnt*-1))
                           else if DurTime="week" or DurTime="weeks" then
                                   Date.AddWeeks(UpgradeRpDate, (DurCnt*-1))
                           else if DurTime="month" or DurTime="months" then
                                  Date.AddMonths(UpgradeRpDate, (DurCnt*-1))
                           else if DurTime="year" or DurTime="years" then
                                  Date.AddYears(UpgradeRpDate, (DurCnt*-1))
                           else ""
in StartUpgradeDate