Date Problem

[DavidG_NJ]

I am building a model for orders. Each day, I add the set of open orders with a Load Date,  Invoice Number and Expected Shipping Date (along with several other columns). The Expected Shipping Date might change over time until the order is shipped.

The business person wants to be able to select a range of load dates and then return the expected shipping dates based on invoice number in Excel. Using the example below, they would like to see the first ship date and the last ship date from the selected range of load dates (in chronological order by load date).  In this case, they want the first ship date to be 10/21/2021 since it is tied to the 10/13/2021 load date – the first record in the range. They want the last ship date to be 9/20/2021 since it is tied to the 10/20/2021 load date – the last record in the range.

I used the FIRSTDATE Dax function and it returns 9/20/2021 instead of 10/21/2021 which is the first ship date in the range.  The LASTDATE function returns 10/21/2021 instead of the expected 9/20/2021.

These functions seem to be acting as MIN and MAX. Is there any DAX function  or combination of functions that would allow me to return the first date and last date based on the chronological order of the load date?

David

[Anonymous · Accepted solution]

Hi @DavidG_NJ ,

You will need to calculate the first load date and last load date then get the ship date according to these two date.

formula should be like below:

first_ship = 
var first_load = calculate(MIN('Table'[load]),ALLSELECTED('Table'))
return
calculate(min('Table'[ship]),FILTER(ALLSELECTED('Table'),'Table'[load] = first_load))

last_ship = 
var last_load = calculate(MAX('Table'[load]),ALLSELECTED('Table'))
return
calculate(min('Table'[ship]),FILTER(ALLSELECTED('Table'),'Table'[load] = last_load))

Best Regards,

Jay

[johnt75]

You could use TOPN.

Earliest Ship Date =
SELECTCOLUMNS (
   TOPN( 1, Table, Table[Load Date], ASC )
   "@ship date", [Ship Date]
)
Latest Ship Date =
SELECTCOLUMNS (
   TOPN( 1, Table, Table[Load Date], DESC )
   "@ship date", [Ship Date]
)