NOT (TSQL Operator)

Performs a logical NOT of a boolean expression.

Syntax

NOT bool_expr

Arguments

bool_expr

is an expression of type bool.
Such expression can be produced e.g. by comparison operators like =, >, etc.

Return Types

Returns a result of type bool.

Remarks

In SQL, logical operators evaluate to True, False or NULL, with a 3-valued logic.

This table shows the results for the logical NOT operator.

	NOT
True	False
False	True
NULL	NULL

Examples

PRINT NOT 1=1;
PRINT NOT 1=2;
PRINT NOT 1=NULL;

The result is:

false
true
<NULL>