INTRODUCTION TO ORACLE Lynnwood Brown System Managers LLC End User Management – Lecture 3 Copyright System Managers LLC 2007 all rights reserved

INTRODUCTION TO ORACLE

Lynnwood BrownSystem Managers LLC

End User Management – Lecture 3

Copyright System Managers LLC 2007 all rights reserved.

END USER MANAGEMENT

• Create database users by using the CREATE/ALTER USER commands.

• Create database objects (tables, views, synonyms and indexes).

• Control database access/security by granting access privileges: grant update on emp to scott;

• Grant database access so that users can/cannot pass the privilege on to other users: grant update on emp to scott with admin option;


END USER MANAGEMENT

To create a user named SCOTT with password TIGER:

SQL > Create user scott identified by tiger

SQL > Default tablespace users

SQL > Temporary tablespace temp

SQL > Quota 15m on users;

Give SCOTT the privilege to connect to the database and create objects.

SQL > Grant connect, resource to scott;


END USER MANAGEMENT

End User Profiles – Resource Control

SQL > CREATE PROFILE new_userLIMIT sessions_per_user 10 connect_time 30 idle_time 10;

Altering User Access To Resources

SQL > ALTER USER <userID> IDENTIFIED BY <pw>profile new_user;

END USER MANAGEMENT

• Create roles to automate the security/access process:

SQL > create role manager;SQL > grant update on emp to manager;SQL > grant manager to scott;

• Oracle has several pre-defined roles. One of the pre-defined roles is called DBA.


END USER MANAGEMENT

• How to determine the privileges a user or role has:

SQL > select grantee, privilege from sys.dba_sys_privs;

• How to determine which users are in which roles:

SQL > select grantee, granted_role from sys.dba_role_privs;

OBJECT CREATION

Database objects include:

Tables – Used to store records (rows of data)

Views – Like a table but takes up no disk space. Is based on an underlying table.

Indexes – Use to speed retrieval of data from a table.

Synonyms – Used to reference objects owned by another user without having to reference the object owners name/schema.

Sequence – Used to generate a unique number

Database links – Used to access data in one database from another database.

Copyright System Managers LLC 2007all rights reserved.

OBJECT CREATION

Create Table:

Create table dept(deptno number,Creation date,Dname varchar2(10)Dloc varchar2(20);

Create View:

Create view DVIEW as select deptno, dname, dloc from dept;


OBJECT CREATION

Create Index:

Create index i_dept on dept(deptno);

Create Synonym:

Create public synonym dept on dept;

Create Sequence:

Create sequence dept_num start with 1 increment by 1;


OBJECT MANAGEMENT

System and Object Management

ALTER TABLE EMP ADD (COLx NUMBER(7,2)…..);

ALTER TABLE EMP MODIFY (COLx NUMBER(8,2));

ALTER SESSION <userID> IDENTIFIED BY <pw>;

ALTER SYSTEM SET LICENSE_MAX_SESSIONS/USERS

LICENSE_SYSTEMS_WARNINGS;


THE DATA DICTIONARY

SOME ORACLE DATA DICTIONARY TABLES/VIEWS FOR MANAGING END USERS:

Table/View Name Description DBA_USERS Names of all users of the databaseDBA_TABLES Names of all tables in the databaseDBA_INDEXES Names of all indexes in the databaseDBA_SYNONYMS Names of all indexes in the synonymsDBA_SEQUENCES Names of all sequences in the databaseDBA_VIEWS Names of all views in the database

There are many other tables/views in the Oracle data dictionary. Refer to the Oracle Administrators Guide for a complete list/description


THE DATA DICTIONARY

DATA DICTIONARY VIEWS ACCESSIBLE TO END USERS:

• DBA_<name> - End users must be granted the privilege to access the DBA views

• ALL_<name> - Objects that the end user has access to but did not create

• USER_<name> - Objects created by the end user


Documents

INTRODUCTION TO ORACLE Lynnwood Brown System Managers LLC End User Management – Lecture 3 Copyright System Managers LLC 2007 all rights reserved