Comparing values in the same column with different data field

[EffePi]

I've this table that is incremented everyday with daily data. Now I would have a column in which I put the percentage difference between the values of "Positivi" column of the day with the values of one week earlier where possible(obviously for the first week it is impossible). How could I do this?

Thank you in advance

[v-shex-msft · Accepted solution]

Hi @EffePi,

It sounds like a general requirement to get the difference from current records with records before one week. I'd like to suggest you add a variable to get the last value before one week and compare it with the current one.

Measure =
VAR currDate =
    MAX ( Table[Date] )
VAR prevDate =
    CALCULATE (
        MAX ( Table[Date] ),
        FILTER ( ALLSELECTED ( Table ), [Amount] <> BLANK () && [Date] <= currDate - 7 ),
        VALUES ( Table[Category] )
    )
VAR prevAmount =
    CALCULATE (
        SUM ( Table[Amount] ),
        FILTER ( ALLSELECTED ( Table ), [Date] = prevDate ),
        VALUES ( Table[Category] )
    )
RETURN
    DIVIDE ( SUM ( Table[Amount] ) - prevAmount, prevAmount )

Regards,

Xiaoxin Sheng

[amitchandak]

@EffePi , if you want to do using measure, you can do with date table and measure like example

This Day = CALCULATE(sum('order'[Qty]), FILTER(ALL('Date'),'Date'[Date]=max('Date'[Date])))
Last Day = CALCULATE(sum('order'[Qty]), FILTER(ALL('Date'),'Date'[Date]=max('Date'[Date])-1))
Last Day = CALCULATE(sum('order'[Qty]), previousday('Date'[Date]))
7 behind Sales = CALCULATE(SUM(Sales[Sales Amount]),dateadd('Date'[Date],-7,DAy))

for week you need these columns in date table

Week Rank = RANKX(all('Date'),'Date'[Week Start date],,ASC,Dense)

measures
This Week = CALCULATE(sum('order'[Qty]), FILTER(ALL('Date'),'Date'[Week Rank]=max('Date'[Week Rank])))
Last Week = CALCULATE(sum('order'[Qty]), FILTER(ALL('Date'),'Date'[Week Rank]=max('Date'[Week Rank])-1))
Last year Week= CALCULATE(sum('order'[Qty]), FILTER(ALL('Date'),'Date'[Week Rank]=(max('Date'[Week Rank]) -52)))

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 :radacad sqlbi My Video Series Appreciate your Kudos.