Sys User

The database has a special user SYS that cannot be deleted. The SYS user has universal privileges and can perform all actions on the database.

The default password of the SYS user is aX1234567. To change the SYS user password you must be logged in as SYS or as a user with the ALTER USER privilege.

ALTER USER sys IDENTIFIED BY "<new_password>";

For security reasons, always replace the default password of the SYS user with a secure password.