Here are some examples of Oracle alter table syntax to modify data columns and note that you can add constraints like NOT NULL: ALTER TABLE customer MODIFY (cust_name varchar2(100) not null, cust_hair_color varchar2(20)) ;
Did Sir Isaac Newton write any books? His best known book is Principia (Philosophiae Naturalis Principia Mathematica) published in 1687; which includes his laws of motion. Edit
Isaac Newton. In physics, a newton (N) is the metric unit of force. It was named after Sir Isaac Newton. Sir Isaac Newton was a physicist, mathematician, and philosopher. Newton's theory of classical mechanics was one of the most important and influential achievements in science.