Sum for last 7 working days

[Anonymous]

I need to calculate the change in qty between last 7 days and previous 7 days.  I am doing that by:

Qty Change 7d = calculate([Returned Qty],DATESBETWEEN('DateTable'[Date],TODAY()-8,TODAY()) - calculate([Returned Qty],DATESBETWEEN('DateTable'[Date],TODAY()-7,TODAY()-15))

I am using a Date Dim table and I do have week names and week numbers in the table. How do I change the DAX to only include last 7 working days (and 7 working days prior to that) & exclude Saturday and Sunday? 

Many Thanks. 

[Anonymous]

Hi all, I've created a table showing the balance and two measures to show the rpevious days balance and the difference between the two balances.

I'm trying to create a measure which works out the net difference for the last 7 days. Could someone please help?

[v-ljerr-msft · Accepted solution]

Hi @Anonymous,

Based on my test, you should be able to follow steps below to get your expected. 

1. Use the formula below to add a calculate column in your DateTable that is 1 for workdays and 0 for non-workdays.

IsWorkday = SWITCH(WEEKDAY('DateTable'[Date]),1,0,7,0,1)

2. User the formula below to create a measure to calculate the workdays between a date and Today.

Count Of Workday =
COUNTROWS (
    FILTER (
        ALL ( 'DateTable' ),
        'DateTable'[Date] <= TODAY ()
            && 'DateTable'[Date] >= MAX ( 'DateTable'[Date] )
            && 'DateTable'[IsWorkday] = 1
    )
)

3. Then you should be able to use the formula below to create the measure to calculate the change in qty between last 7 days and previous 7 days.

Qty Change 7d =
CALCULATE (
    [Returned Qty],
    FILTER ( 'DateTable', [Count Of Workday] > 0 && [Count Of Workday] <= 8 )
)
    - CALCULATE (
        [Returned Qty],
        FILTER ( 'DateTable', [Count Of Workday] > 8 && [Count Of Workday] <= 15 )
    )

Regards

[Anonymous]

Awesome.. Thanks.