NULL value comparison

Good Day,

I'm trying to figure out why a postgresql query doesn't return what I'd expect with a query like this where there are NULL values:

select * from users where is_enabled<>'Y';

I'm expecting it to return all records where is_enabled is 'N' or NULL. Perhaps my expectations are misguided. Any thoughts would be appreciated.

Thanks!
Michael

Example:

CREATE TABLE users (
"name" char(50) NOT NULL,
"is_enabled" char
)

insert into users (name, is_enabled) values ('Michael', 'Y');
insert into users (name, is_enabled) values ('Jeremy', 'N');
insert into users (name, is_enabled) values ('Sherry', NULL);

select * from users where is_enabled<>'Y';
+----------------------------------------------------+------------+
| name | is_enabled |
+----------------------------------------------------+------------+
| Jeremy | N |
+----------------------------------------------------+------------+
1 rows in set (0.03 sec)