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
Newtonâs Laws of Motion. A painting of Sir Isaac Newton by Sir Godfrey Kneller, dated to 1689. Sir Isaac Newton's three laws of motion describe the motion of massive bodies and how they interact. While Newtonâs laws may seem obvious to us today, more than three centuries ago they were considered to be revolutionary. Newton was one of the most influential scientists of all time.