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
Opticks concludes with a special appendix called âQueries,â in which Newton expressed his views on the nature of the universe. In particular, he sets forth his views on the structure of matter, in which not only the concept of the atom but also that of the molecule are implied.