cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
adityakommu Member
Member

Compute Lead and Lag

Hello All,

 

How do you perform lead and lag functions in DAX?

 

Thanks

Aditya

1 ACCEPTED SOLUTION

Accepted Solutions
Super User
Super User

Re: Compute Lead and Lag

Hi @adityakommu,

 

The DAX calculations are based on context so if you want to perform calculations that are based on the previous records or next records you have several ways of doing this from the EARLIER function, the time intelligence functions, the usage of ID column.

 

I have setup a simple model with tabel below:

 

ID             ENAME     JOB               SAL

1MILLERCLERK1300
2CLARKMANAGER2450
3KINGPRESIDENT5000
4SMITHCLERK800
5ADAMSCLERK1100
6JONESMANAGER2975
7SCOTTANALYST3000
8FORDANALYST3000
9JAMESCLERK950
10MARTINSALESMAN1250
11WARDSALESMAN1250
12TURNERSALESMAN1500
13ALLENSALESMAN1600
14BLAKEMANAGER2850
15MARTINSALESMAN1250
16WARDSALESMAN1250
17TURNERSALESMAN1500
18ALLENSALESMAN1600
19BLAKEMANAGER2850

 

If you add this two measure you will get the calculation with previous row and next row however this is just an example, I did it with a measure but you can also do it in the query editor making it like SQL with an addtinal column. So you have several ways of making LEAD and LAG calculations depending on your model and necessities.

 

Previous Difference =
VAR Selecet_Emp =
    ( MAX ( Salary[ID] ) - 1 )
RETURN
    IF (
        HASONEFILTER ( Salary[ID] );
        SUM ( Salary[SAL] )
            - CALCULATE (
                SUM ( Salary[SAL] );
                FILTER (
                    ALL ( Salary[ID]; Salary[ENAME]; Salary[JOB] );
                    Salary[ID] = Selecet_Emp
                )
            );
        BLANK ()
    )




Next Difference = 
VAR Selecet_Emp =
    ( MAX ( Salary[ID] ) + 1 )
RETURN
    IF (
        HASONEFILTER ( Salary[ID] );
        SUM ( Salary[SAL] )
            - CALCULATE (
                SUM ( Salary[SAL] );
                FILTER (
                    ALL ( Salary[ID]; Salary[ENAME]; Salary[JOB] );
                    Salary[ID] = Selecet_Emp
                )
            );
        BLANK ()
    )

cal.png

 

Regards,

MFelix

 

 


Regards

MFelix


Did I answer your question? Mark my post as a solution!

Proud to be a Datanaut!




View solution in original post

1 REPLY 1
Super User
Super User

Re: Compute Lead and Lag

Hi @adityakommu,

 

The DAX calculations are based on context so if you want to perform calculations that are based on the previous records or next records you have several ways of doing this from the EARLIER function, the time intelligence functions, the usage of ID column.

 

I have setup a simple model with tabel below:

 

ID             ENAME     JOB               SAL

1MILLERCLERK1300
2CLARKMANAGER2450
3KINGPRESIDENT5000
4SMITHCLERK800
5ADAMSCLERK1100
6JONESMANAGER2975
7SCOTTANALYST3000
8FORDANALYST3000
9JAMESCLERK950
10MARTINSALESMAN1250
11WARDSALESMAN1250
12TURNERSALESMAN1500
13ALLENSALESMAN1600
14BLAKEMANAGER2850
15MARTINSALESMAN1250
16WARDSALESMAN1250
17TURNERSALESMAN1500
18ALLENSALESMAN1600
19BLAKEMANAGER2850

 

If you add this two measure you will get the calculation with previous row and next row however this is just an example, I did it with a measure but you can also do it in the query editor making it like SQL with an addtinal column. So you have several ways of making LEAD and LAG calculations depending on your model and necessities.

 

Previous Difference =
VAR Selecet_Emp =
    ( MAX ( Salary[ID] ) - 1 )
RETURN
    IF (
        HASONEFILTER ( Salary[ID] );
        SUM ( Salary[SAL] )
            - CALCULATE (
                SUM ( Salary[SAL] );
                FILTER (
                    ALL ( Salary[ID]; Salary[ENAME]; Salary[JOB] );
                    Salary[ID] = Selecet_Emp
                )
            );
        BLANK ()
    )




Next Difference = 
VAR Selecet_Emp =
    ( MAX ( Salary[ID] ) + 1 )
RETURN
    IF (
        HASONEFILTER ( Salary[ID] );
        SUM ( Salary[SAL] )
            - CALCULATE (
                SUM ( Salary[SAL] );
                FILTER (
                    ALL ( Salary[ID]; Salary[ENAME]; Salary[JOB] );
                    Salary[ID] = Selecet_Emp
                )
            );
        BLANK ()
    )

cal.png

 

Regards,

MFelix

 

 


Regards

MFelix


Did I answer your question? Mark my post as a solution!

Proud to be a Datanaut!




View solution in original post

Helpful resources

Announcements
New Topics Started Badges Coming

New Topics Started Badges Coming

We're releasing new versions of the badge that everyone's talking about. ;) Check your inbox for notifications.

MBAS 2020

Save the new date (and location)!

Our business applications community is growing—so we needed a different venue, resulting in a new date and location. See you there!

Difinity Conference

Difinity Conference

The largest Power BI, Power Platform, and Data conference in New Zealand

Power Platform 2019 release wave 2 plan

Power Platform 2019 release wave 2 plan

Features releasing from October 2019 through March 2020

Top Solution Authors
Top Kudoed Authors (Last 30 Days)