What is the difference between DEFAULT NULL and the CHECKBOX NULL mysql?

Question

What is the difference between DEFAULT NULL and the CHECKBOX NULL mysql?

I can set default as NULL or there is a checkbox below which I can check to say NULL?

What's the difference?

Answer 1

Having a column DEFAULT NULL means if you don't set a value for the column, it will be NULL by default.

Having a column NULL(able) means it can be NULL at all, otherwise it will require you to set a value for the column, either by default or in the insert query. Only check that box if the value is supposed to be optional.