Along with the
RDBMS software, Oracle provides two utilities that you can use to back up and
restore the database. These utilities are Export and Import.
The Export utility dumps the definitions and data
for the specified part of the database to an operating system binary file. The Import utility reads the file produced by an export, recreates the
definitions of objects, and inserts the data
If Export and Import are used as a means of
backing up and recovering the database, all the changes made to the database
cannot be recovered since the export was performed. The best you can do is
recover the database to the time when the export was last performed.
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