NULL vs DEFAULT NULL vs NULL DEFAULT NULL in MYSQL column creation?

Question

Following SQL table definition is illustrated one of create table statement from my MYSQL database which is developed by a former developer of my company.

DRO         


        

Answer 1

In all three of the following cases:

price DOUBLE NULL;

price DOUBLE DEFAULT NULL;

price DOUBLE NULL DEFAULT NULL;

price is a double and can be null and its default value is null.