Best practice using time intelligence on a table without continous dates?

[GoingIncognito]

Hi.

What would be the best practice of using time intelligence on a fact table that doesn't have continous dates? I need to count the difference of max interest of the last and penultimate month in the fact table. So like: max interest of last month - max interest of the month before? I do have a calendar table, but last date of calendar date can be later than than the fact tables last date.

I assume I could do something like date( year(fact_tables_column), month(fact_tables_column) -1, date(fact_tables_column))

but better version could be something along the lines of maxx(fact_table, calculate(max(interest), dateadd(calendar_table, -1, month))) ?

[amitchandak · Accepted solution]

Best is to have a calendar table.

you formula would look like

calculate(max(table[intRate]),filter(date,date[date]=max(fact[date])))
last month would be bit tricky
calculate(max(table[intRate]),filter(date,date[date]<=maxx(fact,dateadd(fact[date],-1,month))))
or
calculate(max(table[intRate]),filter(date,dateadd(date[date],-1,month)=max(fact[date])))

To get the best of the time intelligence function. Make sure you have a date calendar and it has been marked as the date in model view. Also, join it with the date column of your fact/s.

Refer
https://radacad.com/creating-calendar-table-in-power-bi-using-dax-functions
https://www.archerpoint.com/blog/Posts/creating-date-table-power-bi

https://www.sqlbi.com/articles/creating-a-simple-date-table-in-dax/

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