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
Quick Answer. Isaac Newton first published on gravity in Principia Mathematica, which was released in July, 1687. A section of Principia Mathematica called Discourse concerning Gravity and its Properties, was read to the Royal Society on April 21, 1686, in preparation for the publication of the book.