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.
By Scott London. Robert Coles is a child psychiatrist, professor at Harvard University, and author of more than fifty books. He is best known for his explorations of children's lives and books that explore their moral, political, and spiritual sensibilities. He is also known as an eloquent spokesman for voluntary and community service â the subject of his book, A Call to Service.