Server Manager has a very rudimentary help facility. To use it, just type in
HELP at the prompt.
This is an example:
In return, you will see a brief summary of command syntax. You won't see a lot of detail--for that you will have to go to the manual, but
often a reminder is all that you need. Try the following simulation to see how the
HELP command works.
Using roles has several benefits, including:
Reducing the number of grants and thereby making it easier to manage security.
Dynamically changing the privileges for many users with a single grant or revoke.
Selectively enabling or disabling depending on the application.
Roles can be used for most system and object privileges. Privileges granted through a role cannot be used for creating an object (views,
packages, procedures, and functions). You need to grant privileges directly to the user for this.
Oracle HELP Command