NOT IN

[Beatriz Lapaz]

Hi!!

I'm working with PHP and I use MySQL. I've just known that in MySQL doesn't exist 
NESTED SELECTS and it's a problem for me.
I'd need a query to get all the ids from a table which are not in another table. 
Something like that:

SELECT TABLE.id_field NOT IN (SELECT ANOTHER_TABLE.id_field);

Could you help me? Thanks.