Forum Discussion
Date difference between dates in same column
Hi Greg_Deckler
i have used a slightly different formula, but your pattern works well:
Difference = VAR _CurrentDate = 'Table'[Extra_Fields.Log_MS_Date_Started] VAR _PreviousDate = MAXX( FILTER( 'Table', 'Table'[Extra_Fields.Log_MS_Date_Started] < EARLIER('Table'[Extra_Fields.Log_MS_Date_Started]) ), 'Table'[Extra_Fields.Log_MS_Date_Started] ) RETURN IF(_PreviousDate = BLANK(), 0, _CurrentDate - _PreviousDate)With kind regards from the town where the legend of the 'Pied Piper of Hamelin' is at home
FrankAT (Proud to be a Datanaut)cpereyra - If I had to guess, you are probably not including all of the filtering criteria that you need to. Like whatever that field is just to the left of your date field. Your filter criteria needs to include all of the row columns that you want to "group" together.
So, like:
FILTER( 'Table', [Column] = EARLIER([Column]) && [Column1] = EARLIER([Column1]) )
cpereyra See my article on Mean Time Between Failure (MTBF) which uses EARLIER: http://community.powerbi.com/t5/Community-Blog/Mean-Time-Between-Failure-MTBF-and-Power-BI/ba-p/339586.
The basic pattern is:
Column =
VAR __Current = [Value]
VAR __Previous = MAXX(FILTER('Table','Table'[Date] < EARLIER('Table'[Date])),[Value])
RETURN
__Current - __Previous
Hi Greg_Deckler
i have used a slightly different formula, but your pattern works well:
Difference = VAR _CurrentDate = 'Table'[Extra_Fields.Log_MS_Date_Started] VAR _PreviousDate = MAXX( FILTER( 'Table', 'Table'[Extra_Fields.Log_MS_Date_Started] < EARLIER('Table'[Extra_Fields.Log_MS_Date_Started]) ), 'Table'[Extra_Fields.Log_MS_Date_Started] ) RETURN IF(_PreviousDate = BLANK(), 0, _CurrentDate - _PreviousDate)With kind regards from the town where the legend of the 'Pied Piper of Hamelin' is at home
FrankAT (Proud to be a Datanaut)Hi, Thank you for getting back. I tried it but still incorrect. Any sugestion ?
cpereyra - If I had to guess, you are probably not including all of the filtering criteria that you need to. Like whatever that field is just to the left of your date field. Your filter criteria needs to include all of the row columns that you want to "group" together.
So, like:
FILTER( 'Table', [Column] = EARLIER([Column]) && [Column1] = EARLIER([Column1]) )
It looks like with this formula is picking up the day before rather than the previous date.
Again,
@cpereyra - If I had to guess, you are probably not including all of the filtering criteria that you need to. Like whatever that field is just to the left of your date field. Your filter criteria needs to include all of the row columns that you want to "group" together.
So, like:
FILTER( 'Table', [Column] = EARLIER([Column]) && [Column1] = EARLIER([Column1]) )
Greg_Deckler
What field would you use as [value]? Do I need a date table besides the date field?I'm new to dax. TIA.
cpereyra Depends on what you are trying to lookup, but in your case probably just use [Date] for [Value] in the formula.
