1. 1 Copyright © 2005, Oracle. All rights reserved. Oracle Database Administration: Overview

2. 1-2 Copyright © 2005, Oracle. All rights reserved. Objectives After completing this lesson, you should be able to do the following: Describe the structure of a relational database and the use of SQL Identify the components of an Oracle instance and database Describe the basic tasks that an Oracle DBA performs Define the tools used to administer an Oracle database Use Oracle MetaLink to research issues and log service requests

3. 1-3 Copyright © 2005, Oracle. All rights reserved. Relational Database: Introduction A relational database is a collection of relations or two-dimensional tables. Oracle Database server Table name: EMPLOYEES Table name: DEPARTMENTS ……

4. 1-4 Copyright © 2005, Oracle. All rights reserved. Relational Database Terminology 2. Primary key3. Column4. Foreign key 6. Null value 1. Row 5. Field

5. 1-5 Copyright © 2005, Oracle. All rights reserved. Full Notes Page

6. 1-6 Copyright © 2005, Oracle. All rights reserved. Relating Multiple Tables Each row of data in a table is uniquely identified by a primary key. You can logically relate data from multiple tables by using foreign keys. Table name: EMPLOYEES Table name: DEPARTMENTS Primary key Foreign key …

7. 1-7 Copyright © 2005, Oracle. All rights reserved. What Is SQL? Structured query language (SQL): Statements used to access data in the Oracle database SQL provides statements for a variety of tasks, including: –Querying data –Inserting, updating, and deleting rows in a table –Creating, replacing, altering, and dropping objects –Controlling access to the database and its objects –Guaranteeing database consistency and integrity

8. 1-8 Copyright © 2005, Oracle. All rights reserved. SQL Statements SELECT INSERT UPDATE DELETE MERGE CREATE ALTER DROP RENAME TRUNCATE COMMIT ROLLBACK SAVEPOINT GRANT REVOKE Data retrieval Data manipulation language (DML) Data definition language (DDL) Transaction control Data control language (DCL)

9. 1-9 Copyright © 2005, Oracle. All rights reserved. Oracle Instance and Database: Overview System Monitor SMON Database Writer DBW0 Check point CKPT Log Writer LGWR Process Monitor PMON Archiver ARC0 SGA Java pool Database buffer cache Redo log buffer Shared pool Large pool

10. 1-10 Copyright © 2005, Oracle. All rights reserved. Using SQL to Access the Database SQL statement is entered. Oracle database Statement is sent to Oracle database server. SELECT department_name FROM departments; Data is retrieved and returned to user.

11. 1-11 Copyright © 2005, Oracle. All rights reserved. Common Tasks of an Oracle Database Administrator Installing and updating Oracle software Creating databases Performing upgrades of the database and software Starting up and shutting down the instance Managing the database’s storage structures Managing users and security Managing schema objects Taking backups and effecting recovery when necessary Proactively monitoring the database and taking preventive or corrective action as required Monitoring and tuning performance

12. 1-12 Copyright © 2005, Oracle. All rights reserved. Tools Used to Administer an Oracle Database Oracle Universal Installer Database Configuration Assistant Database Upgrade Assistant Oracle Net Manager Oracle Enterprise Manager SQL*Plus and i SQL*Plus Recovery Manager Data Pump SQL*Loader

13. 1-13 Copyright © 2005, Oracle. All rights reserved. Full Notes Page

14. 1-14 Copyright © 2005, Oracle. All rights reserved. Working with Oracle Support Oracle Support Services (OSS) provides solution support continuously seven days a week (24 hours per day). Support is delivered in the following ways: –MetaLink Web site –Telephone –Oracle Direct Connect (ODC) remote diagnostic tool The Customer Support Identifier (CSI) number is used to track the software and support licensed by each customer.

15. 1-15 Copyright © 2005, Oracle. All rights reserved. Using MetaLink

16. 1-16 Copyright © 2005, Oracle. All rights reserved. Full Notes Page

17. 1-17 Copyright © 2005, Oracle. All rights reserved. Researching an Issue Perform the following steps to research an issue by using MetaLink: 1.Perform a keyword search. 2.Review the documentation. 3.Use the self-service toolkits. 4.Use the automated diagnostic tests and business flows. 5.Search for applicable patches. 6.Log a service request.

18. 1-18 Copyright © 2005, Oracle. All rights reserved. Full Notes Page

19. 1-19 Copyright © 2005, Oracle. All rights reserved. Logging Service Requests Log a service request (SR) by clicking the TARs link located on the left side of the MetaLink home page. MetaLink performs searches based on a CSI number and SR profile. Provide the following information when logging an SR: –Explanation of the issue (including error messages) –Steps taken to troubleshoot the issue –Software version –Steps required to reproduce the problem –Business impact of the issue

20. 1-20 Copyright © 2005, Oracle. All rights reserved. Full Notes Page

21. 1-21 Copyright © 2005, Oracle. All rights reserved. Summary In this lesson, you should have learned how to: Describe the structure of a relational database and use of SQL Identify the components of an Oracle instance and database Describe the basic tasks that an Oracle DBA performs Define the tools used to administer an Oracle database Use MetaLink to research issues and log service requests

22. 1-22 Copyright © 2005, Oracle. All rights reserved.