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 entered Trinity College at the University of Cambridge in 1661. He received his bachelor of arts degree in 1665 as the Great Plague was sweeping through London. The University of Cambridge closed as a precaution and Newton fled to his family's farm in Lincolnshire 90 km (60 miles) to the north. In the summer of 1666, Newton began work on his theory of universal gravitation.