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
The Isaac Newton (1642 â 1727) quote above, from Memoirs of the Life, Writing, and Discoveries of Sir Isaac Newton (1885) by Sir David Brewster speaks to the depth of what we have left to discover. This world is grand and there lies an ocean of undiscovered findings that are waiting for eager and curious minds.