Section 17 Quiz: Oracle Database Programming with SQL

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Questions and Answers

What type of privileges do users need to manipulate the content of objects in the database?

Object privileges (correct)

Schema privileges

System privileges

Role privileges

Which level of security covers access and use of the database at the system level?

Role Security

Schema Security

Object Security

System Security (correct)

What is a schema in the context of a database?

A role in the database

A collection of objects owned by a database user (correct)

A group of related privileges

A set of system privileges

Which system privilege allows a user to create other Oracle users?

Create User (A) Signup and view all the answers

What is the primary role that usually holds system privileges such as creating or removing users?

DBA (Database Administrator) (D) Signup and view all the answers

Which type of privileges are needed to grant additional privileges to other users or roles in a database?

Role Privileges (D) Signup and view all the answers

What privilege is required for a user to access a database?

CREATE SESSION (A) Signup and view all the answers

Which privilege allows a user to create tables in their schema?

CREATE TABLE (C) Signup and view all the answers

What is automatically performed behind the scenes in Oracle Application Express?

CREATE SESSION (B) Signup and view all the answers

Which privilege is needed to create a view in a user's schema?

CREATE VIEW (A) Signup and view all the answers

What type of privileges are associated with each database object?

Object privileges (D) Signup and view all the answers

Which of the following is NOT listed as an object privilege for tables in the provided content?

INDEX (A) Signup and view all the answers

What is the purpose of controlling user access in a database?

To maintain security of the database access and use (C) Signup and view all the answers

What are the two types of privileges discussed in the text?

Object privileges and System privileges (A) Signup and view all the answers

What is required to enable a user to have access to a database?

GRANT command (A) Signup and view all the answers

Which statement assigns privileges to objects in a user's schema to other users and/or PUBLIC?

GRANT ... ON ... TO statement (D) Signup and view all the answers

How does working with sequences relate to controlling user access in a multiple-user environment?

Sequences are used to assign unique numbers for identification purposes (A) Signup and view all the answers

What is the primary focus of system security in Oracle Server database?

Controlling access and use of the database at the system level (B) Signup and view all the answers

Why is data security important in a multiple-user environment?

To control who can alter, delete, update, or insert database objects (A) Signup and view all the answers

How many distinct system privileges exist in Oracle Server database?

More than 100 (A) Signup and view all the answers

Which user has the ability to grant users access to the database and its objects in Oracle Server database?

DBA (B) Signup and view all the answers

What does data security in Oracle Server database primarily focus on?

Object-level privileges (D) Signup and view all the answers

Which of the following is NOT a feature of Oracle Server database security?

Executing DML statements on database objects (C) Signup and view all the answers

What is the role of the DBA in Oracle Server database security?

Granting users access to the database and its objects (D) Signup and view all the answers

What does the error message 'table or view does not exist' indicate in Oracle?

The named table or view does not exist (B) Signup and view all the answers

What causes the error message 'table or view does not exist' in Oracle?

Naming a non-existent table or view (D) Signup and view all the answers

Where can you check the system privileges granted to roles in Oracle?

ROLE_SYS_PRIVS view (D) Signup and view all the answers

What type of information can be found in the 'USER_COL_PRIVS_RECD' data dictionary view in Oracle?

Object privileges granted on specific columns to the user (D) Signup and view all the answers

In Oracle, what does the 'USER_TAB_PRIVS_MADE' data dictionary view provide information about?

Object privileges granted by the user on their objects (C) Signup and view all the answers

Where can a user view their privileges in Oracle Application Express Developer?

Security Reports section (D) Signup and view all the answers

Study Notes

Database Security

Database security is classified into two categories: system security and object security.
System security covers access and use of the database at the system level, such as creating users, usernames, and passwords, and allocating disk space to users.
More than 100 distinct system privileges exist, and these are usually held only by the DBA.

Privileges

Users require system privileges to gain access to the database.
Object privileges are required to manipulate the content of objects in the database.
Users can be granted the privilege to grant additional privileges to other users or to roles, which are named groups of related privileges.

Schemas

A schema is a collection of objects, such as tables, views, and sequences.
The schema is owned by a database user and has the same name as that user.
A schema name is a combination of the user's country/state, school, course, and student number.

System Privileges

System privileges include CREATE USER, CREATE SESSION, CREATE TABLE, CREATE SEQUENCE, and CREATE VIEW.
The DBA would not normally grant certain system privileges, such as DROP TABLE, to other users.

Object Privileges

Object privileges cover access and use of the database objects and the actions users can have on those objects.
Each object has a particular set of grantable privileges, including ALTER, DELETE, EXECUTE, INDEX, INSERT, REFERENCES, SELECT, and UPDATE.
Object privileges can be granted to other users or to PUBLIC using the GRANT command.

Granting Privileges

The GRANT command is used to grant privileges to users or PUBLIC, and can be used to grant system privileges or object privileges.
The GRANT command requires the privilege to be granted, the object or schema to which the privilege is granted, and the user or role to which the privilege is granted.

Viewing Privileges

Users can view the privileges they have using the data dictionary views, such as ROLE_SYS_PRIVS, ROLE_TAB_PRIVS, USER_ROLE_PRIVS, USER_TAB_PRIVS_MADE, USER_TAB_PRIVS_RECD, USER_COL_PRIVS_MADE, USER_COL_PRIVS_RECD, and USER_SYS_PRIVS.
The data dictionary views can be accessed using Oracle Application Express Developer.

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Description

Learn about object privileges and system privileges in SQL. Understand how to enable a user to access a database and assign privileges to objects in their schema using the GRANT statement. Practice querying the data dictionary for confirming privileges.

Database Programming with SQL: Controlling User Access - Lesson 17-1

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