Forum Discussion
What's the difference between Firstdate/Lastdate(Date.Date) and Max/Min(Date.Date)?
I'm curious to know what the difference is as using this equation
Calculate( [Total],
Filter(All(Date), Date[Date] < Firstdate(Date[Date]))
yeilds blank as a result but,
Calculate([Total],
Filter(All(Date), Date[Date] < Min(Date[Date])) gives the correct result.
I assume Firstdate/Lastdate is syntax candy and contains a calculate statement which changes the filter context but, why?
Hi SteveD2,
Firstdate() returns a table with only one value so can't find a value less than the value itself. So Date[Date] < Firstdate(Date[Date]) will return blank.Please refer to this blog: http://sqlblog.com/blogs/marco_russo/archive/2013/10/22/difference-between-lastdate-and-max-for-semi-additive-measures-in-dax.aspx.
In addtion, you can use
result = Calculate( MAX('Date'[Date]), LASTDATE('Date'[Date]))instead of
result = Calculate( MAX('Date'[Date]), FILTER('Date', 'Date'[Date] = MAX('Date'[Date])))Regards,
Jimmy Tao
1 Reply
Hi SteveD2,
Firstdate() returns a table with only one value so can't find a value less than the value itself. So Date[Date] < Firstdate(Date[Date]) will return blank.Please refer to this blog: http://sqlblog.com/blogs/marco_russo/archive/2013/10/22/difference-between-lastdate-and-max-for-semi-additive-measures-in-dax.aspx.
In addtion, you can use
result = Calculate( MAX('Date'[Date]), LASTDATE('Date'[Date]))instead of
result = Calculate( MAX('Date'[Date]), FILTER('Date', 'Date'[Date] = MAX('Date'[Date])))Regards,
Jimmy Tao