DAX Variable Scope - Cannot create variables within the correct row context

[BryonScruggs]

Hello Internet, 

I am working on a problem involving the scope of DAX variables. My code defines the hire date and termination date of employees and them implements logic based on the result. My problem is that the scope of my variable is NOT in the row context of each employee, rather, its shows the minimum hiredate and maximum hiredate for ALL employees. Can someone show me how this could could be modified so that the variables "Hire" and "Term" are set for each individual employee? I suspect an iterator function is missing, but I'm stuck. 

thanks!

Employment Cases =

VAR PeriodStart =

    DATE ( 2022, 01, 01 )

VAR PeriodEnd =

    DATE ( 2022, 03, 31 )

VAR Hire =

    MIN ( attr_Tkpr_vw[TkprDateHire] ) // How do I define this variable so that it results in each employees hire date?

VAR Term =

    MIN ( attr_Tkpr_vw[TkprDateTerm] ) // How do I define this variable so that it results in each employees term date?

VAR ReportPeriod =

    DATEDIFF ( PeriodStart, PeriodEnd, MONTH )

VAR S3 =

    DATEDIFF ( Hire, PeriodEnd, MONTH ) / ReportPeriod

VAR S4 =

    DATEDIFF ( Hire, Term, MONTH )

RETURN

    SELECTCOLUMNS (

        attr_Tkpr_vw,

        "EmpID", attr_Tkpr_vw[TkprNumber],

        "Hire", attr_Tkpr_vw[TkprDateHire],

        "Term", attr_Tkpr_vw[TkprDateTerm],

        "Hire Test", Hire,

        "Term Test", Term,

        "Employment Period",

            SWITCH (

                TRUE (),

                AND (

                    AND (

                        attr_Tkpr_vw[TkprDateHire] >= PeriodStart,

                        attr_Tkpr_vw[TkprDateHire] <= PeriodEnd

                    ),

                    attr_Tkpr_vw[TkprDateTerm] >= PeriodEnd

                ), S3,

                AND (

                    AND (

                        attr_Tkpr_vw[TkprDateHire] >= PeriodStart,

                        attr_Tkpr_vw[TkprDateHire] <= PeriodEnd

                    ),

                    AND (

                        attr_Tkpr_vw[TkprDateTerm] >= PeriodStart,

                        attr_Tkpr_vw[TkprDateTerm] <= PeriodEnd

                    )

                ), S4

            )

    )

[v-jialluo-msft · Accepted solution]

^{Hi @BryonScruggs ,}

^{Please follow these steps:}

^{(1) Create a new Table}

Employment Cases = 
VAR PeriodStart =
    DATE ( 2022, 01, 01 )
VAR PeriodEnd =
    DATE ( 2022, 03, 31 )

RETURN
    ADDCOLUMNS (
        SELECTCOLUMNS (
            attr_Tkpr_vw,
            "EmpID", attr_Tkpr_vw[TkprNumber],
            "Hire", attr_Tkpr_vw[TkprDateHire],
            "Term", attr_Tkpr_vw[TkprDateTerm],
            "Hire Test",
                CALCULATE (
                    MIN ( attr_Tkpr_vw[TkprDateHire] ),
                    ALLEXCEPT ( attr_Tkpr_vw, 'attr_Tkpr_vw'[TkprNumber] )
                ),
            "Term Test",
                CALCULATE (
                    MIN ( attr_Tkpr_vw[TkprDateTerm] ),
                    ALLEXCEPT ( attr_Tkpr_vw, 'attr_Tkpr_vw'[TkprNumber] )
                )
        ),
        "Employment Period",
            SWITCH (
                TRUE (),
                AND ( AND ( [Hire] >= PeriodStart, [Hire] <= PeriodEnd ), [Term] >= PeriodEnd ), DATEDIFF ( [Hire Test], PeriodEnd, MONTH ),
                AND (
                    AND ( [Hire] >= PeriodStart, [Hire] <= PeriodEnd ),
                    AND ( [Term] >= PeriodStart, [Term] <= PeriodEnd )
                ), DATEDIFF ( [Hire Test], [Term Test], MONTH )
            )
    )

^{(2)Final output}

^{If that's not what you need, please share the sample file}

^{Best Regards,}

^{Gallen Luo}

^{If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.}

[FreemanZ]

Try to reference and define the date variables inside an iterator function which take an employee-relevant column as the first argument. for example,

ADDCOLUMNS(

ALL(Employee[EmployeeID]),

...

)

VAR, VAR,...RETURN is just an expression block. A VAR is valid immediately after its definition and till its immdiate next RETURN.