To delete one or all of the XUSER entries saved in the XUSER program, use the command xuser [-U <user_key>] clear.
XUSER is not a tool for managing database users. It only manages the XUSER entries for database users in the XUSER program. When you delete an XUSER entry, you do not delete the corresponding database user in the database instance. You can only do this with an SQL statement.
See also: Using XUSER
You can delete a specific XUSER entry or all XUSER entries of the connected operating system user.
To delete the data of a specific XUSER entry, use the above command with the option –U and specify the key name of this XUSER entry as the <user_key>. If you do not specify an option for this command, then you delete all XUSER entries of the connected operating system user.