Comparison Operators

Operator	Description	Example	Result
=	a is equal to b	2 = 2	TRUE
!=	a is not equal to b	2 != 3	TRUE
<>	a is not equal to b	2 <> 2	FALSE
>	a is greater than b	2 > 3	FALSE
>=	a is greater than or equal to b	4 >= NULL	NULL
<	a is less than b	2 < 3	TRUE
<=	a is less than or equal to b	2 <= 3	TRUE

IS (NOT) NULL

Operator	Description	Example	Result
expression IS NULL	TRUE if expression is NULL, FALSE otherwise	(4>= NULL) IS NULL	TRUE
expression IS NOT NULL	FALSE if expression is NULL, TRUE otherwise	(4>= NULL) IS NOT NULL	FALSE