Using the WITH ROWIDS Option (IDS)

Nonfragmented tables contain a hidden column called rowid, but by default, fragmented tables have no rowid column. You can use the WITH ROWIDS keywords to add the rowid column to a fragmented table. Each row is automatically assigned a unique rowid value that remains stable for the life of the row and that the database server can use to find the physical location of the row. Each row requires an additional four bytes to store the rowid.

You cannot use the WITH ROWIDS clause with typed tables.