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
Wikipedia comments that, ' Sir Isaac Newton, FRS (4 January 1643 â 31 March 1727 [OS: 25 December 1642 â 20 March 1726]) was an English physicist, mathematician, astronomer, natural philosopher, alchemist and theologian.