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not

Returns the inverse of a Boolean condition. The function returns TRUE if a condition is false, and returns FALSE if a condition is true.

not ( condition )

The following table describes the argument for this function:

Argument	Description
condition	Boolean expression or value.

Boolean.

NULL if the condition is NULL.

The following expression returns the inverse of a Boolean condition:

not ( EMPLOYEE = concat ( FIRSTNAME, LASTNAME ))

The following table contains example arguments and return values:

EMPLOYEE	FIRSTNAME	LASTNAME	RETURN
Fullname	Full	Name	FALSE
Lastname	Lastname	First	TRUE