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.
Robert J. Conrad. Robert James Bob[1] Conrad Jr.[2] (born 1958)[3] is a United States District Judge of the United States District Court for the Western District of North Carolina and a former nominee to the United States Court of Appeals for the Fourth Circuit[4] to take the place of the retired James Dickson Phillips Jr.[5][6]