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Anonymous
Not applicable

## Sum for last 7 working days

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.

1 ACCEPTED SOLUTION
Employee

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

3 REPLIES 3
Anonymous
Not applicable

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?

Employee

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
Not applicable

Awesome.. Thanks.

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