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
So Newton had famous friendsâincluding Voltaireâhelping him to promote the story. No wonder it caught on! And, for what it's worth, Stukeley's story is supposed to be based on a conversation he had with Newton in 1726, the year Newton died. I guess it just took him a while (25 years) to publish the biography. source: http://j.mp/6fRWfM