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
Newton's book argued that mathematics and physical science were separate and could not explain each other. Newton's book argued that gravity could not be explained by mathematics alone. Newton's book made the bold argument that physical science required the use of faith to understand the natural world. Newton's book argued that mathematical principles could be applied to our understanding of the natural world.