How to alter a user’s tablespace in Oracle?

1 year ago
Liam
2 minutes

To change the tablespace of an Oracle user, you can follow these steps:

  1. Connect to the Oracle database: Log in to the Oracle database using administrator privileges.
  2. Check user tablespace: Run the following command to view the tablespace of the current user:
  3. Retrieve the default tablespace for a specific username from the dba_users table.
  4. ‘username’ is the name of the user whose tablespace needs to be modified.
  5. To create a new table space (optional), you can use the following command:
  6. Create a new tablespace with a datafile located at ‘path_to_datafile’ and a size of 100MB.
  7. In this, ‘new_tablespace’ is the name of the new tablespace, ‘path_to_datafile’ is the path and name of the data file for the new tablespace, and ‘SIZE’ is the size of the tablespace.
  8. Run the following command to modify the user’s tablespace:
  9. Change the default tablespace for the user to new_tablespace.
  10. ‘username’ is the name of the user whose tablespace needs to be modified, and ‘new_tablespace’ is the name of the new tablespace to set as the default.
  11. Verification of table space modification: Run the following command to confirm if the user’s table space has been successfully modified:
  12. Retrieve the default tablespace for the specified username from the list of database users.
  13. If the default tablespace displayed in the results matches the name of the new tablespace, it indicates a successful modification of the user’s tablespace.

Please make sure that the new tablespace is already existing and has enough space for the user before modifying the user’s tablespace. Also, note that modifying the user’s tablespace may prevent access to their previous objects, so remember to back up important data before proceeding and make sure to conduct the operation in a non-production environment.

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