Days Since Change in Different Field

[garynorcrossmmc]

Hi all,

Our team has been asked to calculate the days since Grade change for employees.  Here is a sample set of data we're working with:

This particular employee went through a grade change (from F to G) on April 1, 2024 - so we want to capture the number of days in between today and the date the grade value changed for this employee.  

How do we build this in DAX?  

[v-xianjtan-msft]

Hi @garynorcrossmmc 

Agree with Shravan133. The DATEDIFF function can be used to calculate the interval between dates. Refer to DATEDIFF function (DAX) - DAX | Microsoft Learn.

Furthermore, I would like to add that when multiple employees need to be calculated, it is recommended to create a measure that dynamically calculates the grade change date.

GradeChangeDate = 
CALCULATE(
    MIN('DataTable'[EFFF_FROM_DT]),
    FILTER(
        'DataTable',
        'DataTable'[PRSN_ID] = MAX('DataTable'[PRSN_ID]) &&
        'DataTable'[Compensation Grade] = "G"
    )
)

Then, use this measure in the DATEDIFF function.

DaysSinceGradeChange = 
DATEDIFF(
    [GradeChangeDate],
    TODAY(),
    DAY
)

Best Regards,
Jarvis Tang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[garynorcrossmmc]

Hi @v-xianjtan-msft , thank you for your response - but how do I make this measure dynamic by grade?  This will vary by an employee's grade (A through J), so an employee can make a change from A to B, C to D, sometimes a jump by 2 grades, etc.  

[v-xianjtan-msft · Accepted solution]

Hi @garynorcrossmmc 

I think I understand your needs, please follow the steps below:

1. Create three separate tables to record grade information.

StartGrade = SELECTCOLUMNS(DISTINCT('DataTable'[Compensation Grade]), "Initial selection", 'DataTable'[Compensation Grade])

EndGrade = SELECTCOLUMNS(DISTINCT('DataTable'[Compensation Grade]), "Final selection", 'DataTable'[Compensation Grade])

GradeSlicer = SELECTCOLUMNS(DISTINCT('DataTable'[Compensation Grade]), "Grade selection", 'DataTable'[Compensation Grade])

2. Create a slicer for each of the three new table fields, and a slicer for the “PRSN_ID” field in the main data table.

3. Calculate the number of days between grades using the following DAX creation measure:

DaysBetweenGrades = 
VAR InitialSelection = 
CALCULATE(
    MAX('DataTable'[EFFF_FROM_DT]),
    FILTER(
        'DataTable',
        'DataTable'[PRSN_ID] = SELECTEDVALUE('DataTable'[PRSN_ID]) &&
        'DataTable'[Compensation Grade] = SELECTEDVALUE('StartGrade'[Initial selection])
    )
)

VAR FinalSelection =
CALCULATE(
    MIN('DataTable'[EFFF_FROM_DT]),
    FILTER(
        'DataTable',
        'DataTable'[PRSN_ID] = SELECTEDVALUE('DataTable'[PRSN_ID]) &&
        'DataTable'[Compensation Grade] = SELECTEDVALUE('EndGrade'[Final selection])
    )
)

RETURN
DATEDIFF(
    InitialSelection,
    FinalSelection,
    DAY
)

4. Use the following DAX creation measure to calculate the number of days between the change of a grade for a particular employee and today:

DaysSinceGradeChange = 
VAR GradeSection = 
CALCULATE(
    MIN('DataTable'[EFFF_FROM_DT]),
    FILTER(
        'DataTable',
        'DataTable'[PRSN_ID] = SELECTEDVALUE('DataTable'[PRSN_ID]) &&
        'DataTable'[Compensation Grade] = SELECTEDVALUE('GradeSlicer'[Grade selection])
    )
)

RETURN
DATEDIFF(
    GradeSection,
    TODAY(),
    DAY
)

5. Here is final output, hope it can meet your requirement.

Best Regards,
Jarvis Tang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[Shravan133]

use datediff()

For example: DaysSinceGradeChange =
VAR GradeChangeDate = DATE(2024, 4, 1) -- Replace this with the actual column that holds the grade change date
RETURN
DATEDIFF(GradeChangeDate, TODAY(), DAY)-- returns number of days