NOT
Negates the supplied expression.
Synopsis
NOT expression
Description
The NOT operator negates the supplied boolean expression. Thus, all expressions that evaluate to 1 (true) instead evaluate to 0 (false) and all expressions that evaluate to 0 (false) instead evaluate to 1 (true). The supplied expressions may contain functions and other operations, such as > (greater than), < (less than), or = (equal to).
It is typically used in clauses, such as WHERE clauses.
