NOT DAX Operator


NOT inverts the state of a boolean expression, transforming FALSE to TRUE, or TRUE to FALSE.
NOT is an operator and not a function. Because of the precedence rules, the expression that follows NOT might be evaluated in an unexpected way if you think that NOT is a function.

EVALUATE
{
    -- NOT evaluates the result of the multiplication
    ( "NOT ( FALSE ) * FALSE", "" & NOT ( FALSE ) * FALSE ),
    -- NOT evaluates the result of the multiplication
    ( "NOT ( FALSE * FALSE )", "" & NOT ( FALSE * FALSE ) ),
    -- NOT evaluates only the first FALSE function
    ( "( NOT FALSE ) * FALSE", "" & ( NOT FALSE ) * FALSE )
}
Value1 Value2
NOT ( FALSE ) * FALSE TRUE
NOT ( FALSE * FALSE ) TRUE
( NOT FALSE ) * FALSE 0

The following example has the purpose of clarifying that NOT is an operator and not a function.

DEFINE
    TABLE 'NOT IN' =
        ADDCOLUMNS (
            CROSSJOIN (
                { FALSE, TRUE },
                SELECTCOLUMNS ( { 0, 1, 2 }, "Expression #", [Value] ),
                SELECTCOLUMNS (
                    { ( FALSE, FALSE ), ( FALSE, TRUE ), ( TRUE, TRUE ) },
                    "List Item 1", [Value1],
                    "List Item 2", [Value2]
                )
            ),
            "Expression",
                SWITCH (
                    [Expression #],
                    0,  "NOT ( " & [Value] & " ) IN …",
                    1,  "NOT ( " & [Value] & " IN … )",
                    2,  "( NOT " & [Value] & " ) IN …"
                ),
            "Result",
                SWITCH (
                    [Expression #],
                    0, NOT ( [Value] ) IN { [List Item 1], [List Item 2] },
                    1, NOT ( [Value] IN { [List Item 1], [List Item 2] } ),
                    2, ( NOT [Value] ) IN { [List Item 1], [List Item 2] }
                )
        )

EVALUATE
SELECTCOLUMNS (
    VALUES ( 'NOT IN'[Expression] ),
    "Expression", 'NOT IN'[Expression],
    "…{ FALSE, FALSE }",
        CALCULATE (
            VALUES ( 'NOT IN'[Result] ),
            'NOT IN'[List Item 1] = FALSE,
            'NOT IN'[List Item 2] = FALSE
        ),
    "…{ TRUE, TRUE }",
        CALCULATE (
            VALUES ( 'NOT IN'[Result] ),
            'NOT IN'[List Item 1] = TRUE,
            'NOT IN'[List Item 2] = TRUE
        ),
    "…{ FALSE, TRUE }",
        CALCULATE (
            VALUES ( 'NOT IN'[Result] ),
            'NOT IN'[List Item 1] = FALSE,
            'NOT IN'[List Item 2] = TRUE
        )
)
ORDER BY […{ FALSE, FALSE }] ASC

Expression …{ FALSE, FALSE } …{ TRUE, TRUE } …{ FALSE, TRUE }
NOT ( FALSE ) IN … false true false
NOT ( FALSE IN … ) false true false
( NOT FALSE ) IN … false true true
NOT ( TRUE ) IN … true false false
NOT ( TRUE IN … ) true false false
( NOT TRUE ) IN … true false true

Last update: Jan 31, 2023   » Contribute   » Show contributors

Contributors: Alberto Ferrari, Marco Russo, Kenneth Barber, Martin de la Herran

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Context Transition

This function performs a Context Transition if called in a Row Context. Click to read more.

Row Context

This expression is executed in a Row Context. Click to read more.

Iterator

Not recommended

The use of this function is not recommended. See Remarks and Related functions for alternatives.

Not recommended

The use of this parameter is not recommended.

Deprecated

This function is deprecated. Jump to the Alternatives section to see the function to use.

Volatile

A volatile function may return a different result every time you call it, even if you provide the same arguments. Click to read more.

Deprecated

This parameter is deprecated and its use is not recommended.

DirectQuery compatibility

Limitations are placed on DAX expressions allowed in measures and calculated columns.
The state below shows the DirectQuery compatibility of the DAX function.

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