NOT DAX Function (Logical)
Changes FALSE to TRUE, or TRUE to FALSE.
Syntax
NOT ( <Logical> )
| Parameter | Attributes | Description |
|---|---|---|
| Logical |
A value or expression that can be evaluated to TRUE or FALSE. |
Return values
Scalar A single boolean value.
TRUE or FALSE
Remarks
NOT is not a real function; it is an operator that can be used as a function because of the equivalent syntax.
Examples
-- TRUE and FALSE are the two constant values of True and False (1, 0 )
-- AND performs the logical AND between two conditions
-- OR performs the logical OR between two conditions
-- NOT performs logical negation
EVALUATE
{
( "FALSE", FALSE ),
( "FALSE()", FALSE() ),
( "TRUE", TRUE ),
( "TRUE()", TRUE() ),
( "AND ( TRUE, FALSE )", AND ( TRUE, FALSE ) ),
( "OR ( TRUE, FALSE )", OR ( TRUE, FALSE ) ),
( "NOT ( TRUE )", NOT ( TRUE ) ),
( "NOT ( FALSE )", NOT ( FALSE ) )
}
| Value1 | Value2 |
|---|---|
| FALSE | false |
| FALSE() | false |
| TRUE | true |
| TRUE() | true |
| AND ( TRUE, FALSE ) | false |
| OR ( TRUE, FALSE ) | true |
| NOT ( TRUE ) | false |
| NOT ( FALSE ) | true |
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 |
Related functions
Other related functions are:
Last update: Nov 5, 2025 » Contribute » Show contributors
Contributors: Alberto Ferrari, Marco Russo, Kenneth Barber
Microsoft documentation: https://docs.microsoft.com/en-us/dax/not-function-dax
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