I cannot find where I can set the field as NOT NULL in phpmyadmin. I would like my database to control this feature. I do this programmatically, but I believe that this can add an extra layer of security to my system.
When editing a field on the Structure tab, find the NULL check box. If it is not checked, this is equivalent to the NOT NULL statement.
NOT NULL
if you remove this property, it means that there is no null.for clear visualization for beginners.