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 earliest known printed book, older than the Gutenberg Bible, was a quarto. El libro impreso mÃ¡s antiguo que se conoce, mÃ¡s antiguo que la Biblia de Gutenberg, fue un libro en cuarto. 2.