Change Oracle Database Character Set: Step-by-Step

1 year ago
Ava Mitchell
1 minute

To change the character set of an Oracle database, follow these steps:

  1. To determine the character set of the current database, you can query the V$NLS_PARAMETERS view.
  2. Create a database export file: Before changing the character set, make sure to back up the database to prevent any data loss. You can use the expdp command to create the database export file.
  3. Change the database character set: You can modify the character set of a database using the ALTER DATABASE command. For example, you can use the following command to change the database character set to AL32UTF8:
ALTER DATABASE CHARACTER SET AL32UTF8;
  1. Rebuilding database: After modifying the character set, you need to rebuild the database in order for the changes to take effect. You can use the impdp command to import the previously backed-up database files.
  2. Restart the database: Once the rebuilding is complete, restart the database to apply the new character set settings.

Please be aware that changing the database character set may result in data loss or corruption, so it is recommended to back up the database before making any modifications.

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