select and null

I have a table and want to print out all entries that are not Null ...

select * from test;
entry
-------
1
2
3

(4 rows)

select * from test where entry=Null;
entry
-------

(1 row)

select * from test where entry<>Null;
entry
-------
(0 rows)

select * from test except select * from test where entry=Null;
entry
-------
(0 rows)

What is my brain missing here ???

thanks,
peter

--
mag. peter pilsl
email: pilsl(at)goldfisch(dot)at
pgp-key available