Beginning Oracle Database 11g Administration From Novice to Professional

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CHAPTER 8 USER MANAGEMENT AND DATA LOADING
Tip Oracle provides five sample schemas for instructional purposes, including, for example, the Human
Resources () schema used in this chapter. They are described in Oracle Database 11g Sample Schemas
and Oracle Database 11g Examples Installation Guide—both freely searchable and downloadable at
and at .
The scripts that create and populate the schemas should be installed when the Oracle software is installed,
as discussed in Chapter 5. You can use the scripts as a template when creating scripts to populate your own
database, for example, creates the tables in the schema, and creates indexes
on the tables. The scripts are located in the directory; the master script is
. You can choose to have these schemas created and populated by Database Configuration
Assistant (DBCA) when you create the database—as discussed in Chapter 6—or you can do it yourself using
the instructions in Oracle Database 11g Sample Schemas.
User Management
As you might expect, nobody can store data in the database or retrieve data from it unless
they are properly authorized to do so. The following sections explore the five commands
required for user management: , , , , and . Only
users with the appropriate privileges can execute these commands. For example, only
a user with the Create User privilege can execute the command. You can
perform user management tasks using the account.
Creating Users
The command is used to specify the alias by which the database knows a user;
a typical convention is to use the first character of the user’s first name and the first seven
characters of the person’s last name; for example, in the case of a user named
Iggy Fernandez. Listing 8-6 shows a minimalist example of the command;
the clause is used to specify the password that the user must specify to gain
access to the database.