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
Amazing Grace was written by an Englishman who in the early part of his life was an outspoken atheist, libertine, and slave trader. John Newton was born in London in 1725, the son of a Puritan mother and a stern ship commander father who took him to sea when he was 11 (âI am persuaded that he loved me but he seemed not willing that I should know it,â he later wrote).