Oracle provides alter table syntax to modify data columns in-place in this form: alter table table_name modify column_name datatype; If you are brave you can use a single alter table syntax to modify multiple columns:
Julius Robert Oppenheimer (22 April 1904 â 18 February 1967) was an American physicist and the scientific director of the Manhattan Project.
John Dalton (1766-1844) was an English scientist who made his living as a teacher in Manchester. He is best known for his atomic theory. John Dalton was aware of these observations and in about 1808 he offered an explanation for them that became known as Dalton's atomic theory.