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 of all trades. English scientist and mathematician Isaac Newton is most famous for his law of gravitation, and was instrumental in the scientific revolution of the 17th century. Above: A photo of Newton Investigating Light, a portrayal of Isaac Newton created by J A Houston, circa 1879.