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
Blake's representation of Newton. Blake. The Age of Reason, as it was called, was spreading rapidly across Europe. In the late 17th century, scientists like Isaac Newton and writers like John Locke were challenging the old order. Newton's laws of gravity and motion described the world in terms of natural laws beyond any spiritual force. In the wake of political turmoil in England, Locke asserted the right of a people to change a government that did not protect natural rights of life, liberty and property.