Help me in solving GSQ08 problem

help
,
1

My issue

ALTER TABLE employee
ADD COLUMN Designation default Null;

My code

/* Write a query to add a column 'Designation' to the table and set 'Null' as the default value. Output the entire table.*/
ALTER TABLE employee 
ADD COLUMN Designation  default Null;

Learning course: Learn SQL
Problem Link: CodeChef: Practical coding for everyone