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
Translated by E.A. Wallis Budge. The Book of the Dead is the common name for the ancient Egyptian funerary texts known as The Book of Coming [or Going] Forth By Day. The name Book of the Dead was the invention of the German Egyptologist Karl Richard Lepsius, who published a selection of some texts in 1842.