Hi,
I've pulled in a single date column called build_dates from SQL.
This is a record of all the properties/assets on our portfolio and goes well back into the 1900's.
I'm trying to figure out how to write a DAX formula that will show the last 12 months (of when the report was run) portfolio growth, month by month to put into a line chart. For example I have it in my head the following steps:
- Count the number of assets in the portfolio that is older than 12 months from today (store this in a variable maybe?)
- Count the number of assets built during the month of 12 months ago and add this to the existing portfolio number
- Same as step 2, but include the month of 11 months back as well
- Same as step 3, but include month of 10 months back as well.
But I'm not understanding how to program this, without effectively making 12-13 individual calculations. 0_o.
I have a DateTable created that I join to this import. This datetable has the calendarDate, Month, Year and various other columns often found in a DT.
Should I be using a YTD function maybe?
One of the things that has confused me, is that I was looking to use DATEADD() like you would in SQL. But it appears you cannot use DATEADD(TODAY(),n,x) to work out 12/11/10 months back from today.
Any guidance would be much appreciated please.
Thanks.
