I have a database with columns that are allowed to be NULL.
Whenever I run a query against this database using
$wpdb->get_results the columns that are NULL are always returned with an actual value; the number zero.
In my database NULL and zero actually have totally different meanings and I would like to be able to get the correct values from the database without Wordpress translating the returned value.
How can I select from the database so that NULL values are maintained?