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:
PRINCETON, N. J., Feb. 18--Dr. J. Robert Oppenheimer, the nuclear physicist, died here tonight at the age of 62. A spokesman for the family said Dr. Oppenheimer died at 8 o'clock in his home on the grounds of the Institute for Advanced Study. He had been ailing since early last year with cancer of the throat.
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]