Authorize the created database user
There are two built-in users inside oracle: system and sys. Users can log in directly to the system user to create other users because system has the authority to create other users. When installing oracle, the user or system administrator can first create a user for himself.
Authorization command, oracle is compatible with the previous version, providing three standard roles (role): connect/resource and dba.
Syntax: grant connect, resource to username;
Example: grant dba, resource to dsdb;
