Get value from previous record based on Period

[mkoontz]

I have a table that is by Contract, Period (YYYYMM). I have a measure that is grabbing the previous record based on the Period column. This works great when the previous record is in the same year, but when I go from 202101 to 202012, my measure will not work. I am looking for some guidance on the best approach to grab previous record when it switches years based on my Period column.

Previous Value =

    CALCULATE( [measure for column ($)],

        FILTER( ALL( dimDate ),

        dimDate[Period] = SELECTEDVALUE( dimDate[Period] ) - 1

    )

)

ex. 202101 - 1 ( will not get me the 202012 I am looking for). 

Any help would be greatly appreciated. Thanks in advance. I will continue looking on my end.

[amitchandak · Accepted solution]

@mkoontz , Create a rank on YYYYMM in you date table.

a new column

Period Rank = RANKX(all('Date'),'Period'[year period],,ASC,Dense)

try measures like these examples 

This Period = CALCULATE( [measure for column ($)], FILTER(ALL('Period'),'Period'[Period Rank]=max('Period'[Period Rank])))
Last Period = CALCULATE( [measure for column ($)], FILTER(ALL('Period'),'Period'[Period Rank]=max('Period'[Period Rank])-1))

[mkoontz]

@amitchandak Thank you for the quick reply. Greatly appreciated. Your solution worked great for me.

Thank you again.