OCA/OCP: Oracle9 DBA Fundamentals I Study Guide

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Feel free to let me know what you think about this or any other Sybex book by sending me an email at contactus sybex. Customer feed- back is critical to our efforts at Sybex. Thanks for always being there for me. To my children: Joshua and Jeanette. You brighten my day, every day! Acknowledgments I thank the great publishing team at Wiley for helping me throughout the writing process. I am grateful to Jeff Kellum, acquisitions editor at Wiley, for initiating this project and having faith in me.

I am indebted to Lisa Bishop, developmental editor, for offering valuable suggestions to improve the readability and organization of the book. Thank you both for your patience and hard work throughout this project. Thank you Kathy Grider-Carlyle, copy editor, for meticulously going through the chapters and making sure there is no ambiguity and that all the pieces tie together. I thank Dassi Zeidel, production editor, for ensuring consistency and accuracy and coordinating the production pro- cess. A technical book is judged by not only who wrote it, but also who reviewed it.

I thank Arup Nanda for reviewing each paragraph of every chapter and for the invaluable comments, tips, and edits. I thank Syed Jaffar Hussain for reading and ensuring the technical accuracy. The input from two Oracle stalwarts certainly improved the content and reliability of the book. I sincerely thank Gavin Powell for initially signing up as a coauthor to this book.

Due to unforeseen events, Gavin could complete only one chapter. I thank Gavin for working with me and helping with the book. Thank you Danny Carrizosa for the motivation and your willingness to help out wherever needed. I thank Phil Pearson and the entire team for their trust in my technical abilities. It sure is great working with you all. Last but not least, no words can express the ceaseless support and encouragement given by my dear wife. Thank you, Shiji.

You are the best. I owe my kids several weekends and thank them for their patience and tolerance of so much of my attention being given to this book. Biju has been developing and administering Oracle databases since He now spends time mentoring DBAs, performance tuning, and designing Oracle solutions. He is a fre- quent presenter at Oracle conferences and a contributor to Oracle technical journals. In the last 10 years, he has branched out into technical writing many titles in print in between contract and consulting jobs.

He has writ- ten over published articles, presented over sessions in 22 countries, and coauthored 5 books. He lives in Danbury, CT. Oracle has honored him with the prestigious Oracle ACE Director role and named him DBA of the Year for , both for his excel- lent knowledge and contributions to the Oracle community.

You have made the right decision to pursue certification, because being certified in the latest version of Oracle, Oracle Database 12c, will give you a distinct advantage in this highly competitive market. Many readers may already be familiar with Oracle and do not need an introduction to Oracle databases. Oracle databases are the de facto standard for large Internet sites, mission-critical enter- prise applications, and cloud solutions.

With the acquisition of Sun Microsystems, Oracle offers complete enterprise business solutions with engineered systems capable of running world-class databases and applications. Enterprise Resource Planning ERP application suites, data warehouses, and business applications at many large and medium-sized com- panies rely on Oracle. The demand for DBA resources remains higher than others during weak economic times. This book covers two of the exams required for the OCA certification. Why Become Oracle Certified? Oracle certification is the best way to demonstrate your knowledge and skills in Oracle database systems.

Preparing for the certification exam may be the best time spent on your career because you learn the tasks that are necessary to be successful as a DBA. Certification is proof of your knowledge and shows that you have the skills required to support Oracle core products. It demonstrates that you have a solid understanding of your job role and the Oracle products used in that role. The certification tests are scenario-based, which is the most effective way to assess your hands-on expertise and critical problem-solving skills.

OCPs are among the best paid in the IT industry. Salary surveys consistently show the OCP certification to yield higher salaries than the other certifications, including Microsoft, Novell, and Cisco. Introduction xxi So, whether you are beginning a career, changing careers, securing your present posi- tion, or seeking to refine and promote your position, this book is for you! Oracle Certifications Oracle certifications follow a track that is oriented toward a job role. Only the Database track has OCM.

The Database track is clearly for the Database Administrator job role. The best DBAs work behind the scenes, but are in the spotlight when critical issues arise. They plan, create, maintain, and ensure that the database is avail- able for the business, most importantly, DBAs troubleshoot, diagnose, and resolve issues. They have tools to proactively monitor the database for performance issues and to prevent unscheduled downtime.

Sybex has Oracle certification study guides for the Database track. The following sections will introduce you to the different tiers in the Oracle Database 12c certification track. OCA shows that you have the fundamental knowl- edge and skills to support an Oracle Database 12c database. You only need to pass the 1Z The 1Z test is offered at a Pearson Vue facility. The OCP tier challenges you to demonstrate your continuing experience and knowledge of Oracle technologies.

The OCP test will measure your knowledge in setting up and managing multitenant architecture databases and in backup and recovery. The Oracle Database 12c Administrator Certified Professional certification requires you to have the OCA certification as well as to pass the following exam. The OCM certification credential shows that you have the highest level of expertise in an Oracle product. To become a certified master, you must first achieve OCP status and then complete two advanced instructor-led classes at an Oracle Education facility.

You must also pass a hands-on examination at an Oracle Education facility. You may be asked to choose the country of residence before being directed to the site. Follow the links under Certifications to choose the track and learn more. Choose the Database track to view the different certification versions available. Choose Oracle Database 12c Administrator Certified Associate, and then click on the test to find out more about the test contents, the objectives covered in the test, the passing score, and to register for the test. Oracle documentation contains a wealth of information, which can be used to supplement what you learn from this book.

Oracle provides training series with step-by-step instructions to perform a variety of Oracle Database 12c tasks. You can read articles; view sample code; access documentation; participate in forums; and most importantly, download Oracle Database 12c, Oracle Enterprise Manager Cloud Control 12c, and other Oracle products. The Installation and Administration exam concentrates on the architecture and the basic administration of Oracle 12c databases. The following sections detail the skills needed to pass the SQL Fundamentals and the Installation and Administration exams.

Answer the questions you are sure of first, before you run out of time. Read the questions carefully. Do not jump to conclusions. Make sure you clearly under- stand what each question asks. Some of the scenarios contain nonessential infor- mation and exhibits. There is no negative scoring. After selecting an answer, you can mark difficult questions or the ones you are unsure of and come back to them later. Doing this greatly improves your odds if you need to make an educated guess.

At the end of the test, you can review the questions you marked earlier. You should be familiar with the exam objectives, which are included at the beginning of each chapter. Please check the objective listing on the Oracle Education website for any changes or updates. The detail page for each exam shows the passing score, number of questions, and minutes allocated along with the exam fees and any other requirements.

Part II of the book includes the remaining 11 chapters that cover the objectives for the Oracle Database 12c Installation and Administration exam. It also introduces you to filtering and sorting data. Chapter 3: Using Single-Row Functions discusses the single-row functions and conver- sion functions available, with details on how and where to use them. Chapter 5: Using Joins and Subqueries explains how data from multiple tables can be related via joins, subqueries, and by using SET operators.

Chapter 6: Manipulating Data explores how to manipulate data: adding, removing, and updating data. The chapter also covers how transaction control works. Chapter 7: Creating Tables and Constraints explains how to create and manage tables and constraints. This chapter introduces you to the Oracle Database 12c database archi- tecture and the relationship between logical and physical storage structures.

Chapter 9: Creating and Operating an Oracle Database 12c explains how you can install the Oracle Database 12c software and create a database. It discusses the initial- ization parameters, stages of database startup and shutdown, where to find log and trace files, and how to use the data dictionary. Chapter Understanding Storage and Space Management explores the logical and physical storage of the database. You will learn space management and the various types of tablespaces.

This chapter also discusses monitoring space and reclaiming wasted space. Chapter Managing Data Concurrency and Undo shows you how you can add, update, and remove data from tables, as well as how transactions work. It introduces you to undo data and undo management.

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This chapter also discusses how Oracle manages locks to ensure data concurrency. Be sure to read Chapter 6 before you read this chapter. You will learn to set up network architecture on the server and client. Chapter Implementing Security and Auditing shows how you can secure your data- base using privileges, profiles, and roles. You will also learn to audit database usage.

Chapter Maintaining the Database and Managing Performance explores the tools available in Oracle Database 12c to manage the performance of the database. You will learn about optimizer statistics, Automatic Workload Repository, various advisors, and Automatic Memory Management. Chapter Using Backup and Recovery introduces you to the backup architecture concepts. It discusses the various backup modes and using RMAN. It also delves into the various recovery scenarios and how best to get the data back.

It shows you how to use the Data Recovery Advisor, which can help find and recover the database, as well as offer advice. Chapter Controlling Resources and Jobs shows you how to manage the resources available on the database server using the Resource Manager. You will also learn about the Oracle Scheduler job management system. Chapter Upgrading to Oracle Database 12c familiarizes you with the process of upgrading a database to Oracle Database 12c.

You also learn the various upgrade and migration methods. This chapter also covers the Grid Infrastructure installation and configura- tion, including setting up Automatic Storage Management disks. Each chapter ends with Review Questions that are specifically designed to help you retain the knowledge presented. To really nail down your skills, read and answer each question carefully. The book includes a number of companion study tools, which can be downloaded from www. To best benefit from the book, use the following study method: 1.

Take the assessment tests immediately following this introduction. The answers are at the end of the tests. Carefully read the explanations for any questions you get wrong, and note in which chapters the material is covered. This information should help you plan your study strategy. Study each chapter carefully, making sure you fully understand the information and the test objectives listed at the beginning of each chapter. Pay close attention to any chapter related to questions you missed in the assessment test. Complete all hands-on activities in the chapter, referring to the chapter so that you understand the reason for each step you take.

It is best to have an Oracle Database 12c database available to try out the examples and the code provided in the book. All the code is also included with the additional study tools. Answer the review questions related to that chapter. Note the review questions that confuse or trick you, and study those sections of the book again. The two bonus exams for each exam are included with the accompanying study tools. They will give you a complete overview of what you can expect to see on the real test.

Answer all the flashcard questions included with the study tools. Remember to use the study tools included with this book. The electronic flash cards and the Sybex test engine exam-preparation software has been specifically designed to help you study and pass your exams. The additional study tools can be downloaded from www. To learn all the material covered in this book, you will need to apply yourself regularly and with discipline.

Try to set the same time period every day to study, and select a com- fortable and quite place to do so. If you work hard, you will be surprised at how quickly you will learn this material. You can also find supplemental reading material and Oracle documentation references on my blog that will deepen your knowledge of what you read in this book. All the best! This is convenient, especially if you are new to Oracle. You can reach me by writing to biju.

For more infor- mation about database administration and Oracle Database 12c certification, please visit my blog at www. Sybex strives to keep you supplied with the latest tools and information you need for your work. Please check their website at www. Which SQL would accomplish the task? TAN 4. The following statement will raise an exception on which line? Review the code segment. No error 6. Review the following SQL and choose the most appropriate option.

The statement will show the number of jobs in each department. The statement will show the number of employees in each department. The statement will generate an error. Which datatype stores data outside the Oracle database? BLOB D. The DEPT table has the following data.

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The statement will work without error. None of these statements could use the index. NULL Which of the following statements are true? Choose two. Primary key constraints allow NULL values in the columns. Unique key constraints allow NULL values in the columns. Primary key constraints do not allow NULL values in the columns.

A non-unique index cannot be used to enforce primary key constraints. A user from Dubai is connected to a session in the data- base located on a server in Dallas. What will be the result of his query? None of the above At a minimum, how many join conditions should there be to avoid a Cartesian join if there are three tables in the FROM clause? There is no minimum. Why does the following statement fail? The table should have more than one column in its definition.

NAME is a reserved word, which cannot be used as a column name. The table name is invalid. Column length cannot exceed 30 characters. Which two statements are true about NULL values? In an ascending order sort, NULL values appear at the bottom of the result set. Which of the fol- lowing functions include the NULL rows in its result? Which of the following statements will achieve the desired results? A, B, and C will achieve the desired results. None of these statements will achieve the desired results. Which option is not available in Oracle when modifying tables? Add new columns B.

Rename existing column C. Drop existing column D. Choose all that apply. Years B. Quarters C. Months D. Days E. Hours F.

Minutes G. Seconds H. Fractional seconds Which components are not part of the easy connect connection string? Line 2 B.

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Line 3 C. Line 4 D. There will be no error. Choose the best answer. All of the above What will be result of trunc How many indexes will be created automatically when this table is created? Which line of the following code has an error? FROM emp C. There is no error in this statement. How do you represent the following business rule in an ER diagram? Single solid line.

Single line that is solid at one end and dotted at another end. Single solid line with a crowfoot at one end. The business rule cannot be represented in the ER diagram. What order does Oracle use in resolving a table or view referenced in a SQL statement? All locks created by DML statements are released in the session. All savepoints created are erased in the session. All undo information written from the DML statements are erased.

Which two operators are used to add more joining conditions in a multiple-table query? NOT B. AND D. Comma , What is wrong with the following SQL? Aggregate functions cannot be nested. Which types of constraints can be created on a view? Primary key, foreign key, unique key C. No constraints can be created on a view. Which two declarations define the maximum length of a CHAR datatype column in bytes? CHAR 20 B.

SJC C. What happens when you issue the following command? Choose all correct answers. The indexes on the table are dropped. You cannot truncate a table if triggers are defined on the table. Which two statements will drop the primary key defined on table EMP. Which database version cannot be upgraded directly to Oracle Database 12c? All of the above 2. Which of the following is not considered part of an Oracle database? Data files B. Redo logs C. The pfile and spfile D. Control files 4. Schema B. Table C. Row D. Block 5. Which query can be used to find and categorize all chained jobs only chained jobs , and includes any remote steps as applied to those chained jobs, as executed from the current database?

Choose the best answers, more than one if appropriate. None of the above 7. MMNL B. QMN1 C. MMON D. MMAN 8.

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Which other statements are the minimum required to enable a resumable session? Which utility is used to install Oracle Database 12c? DBCA B. OUI C. Oracle Database 12c is installed using the URL to www. You have just made changes to the listener. Which of the following commands or combinations of commands would you use to put the changes into effect with the least amount of client disruption?

An error will not occur. The job will stop running. The job will be dropped altogether. All of the above. None of the above. Where does Oracle Database 12c record all the changes made to the database that can be used for recovery operations? Control files B. Redo log files C. Alert log file D. Parameter file What is accomplished when you issue the following statement? John is assigned all the roles created in the database. Any existing roles remain the same, but any future roles created will be enabled.

Which activity is a must do before upgrading a database to 12c using the manual upgrade method? Run preupgrd. What would you do to reduce the time required to start the instance after a data- base crash? Multiplex the redo log files B. Increase the size of the redo log files C.

All of the above E. When you are configuring Oracle Shared Server, which initialization parameter would you likely need to modify? Which options are available in DBCA to configure recovery-related operations? Data Guard B. Standby Database C. Fast Recovery Area D. Archiving When you started the Oracle Database 12c database, you got an ORA cannot identify data file … error. Which of the following commands is most likely to generate an error message?

Startup will fail, because you have not completed the instance recovery. Oracle automatically performs recovery. All committed changes are written to data files. During instance recovery, you have the option to selectively commit uncommitted transactions. After the database starts, you have to manually clean out uncommitted transactions from the transaction table. Where does the following procedure allow jobs to be created?

On a remote server as a database destination B. On a remote server using a hostname and IP address C. On a local database server only D. On a local server using a hostname and an IP address E. Which of the following statements is not always true? Every database should have at least two tablespaces.

Every database should have at least two data files. Every database should have at least three multiplexed redo logs. Every database should have at least three control files. How can you prevent someone from using an all-alphabet password? There is no mechanism that lets you prevent an all-alphabet password. Which metadata view can be used to find Oracle Scheduler priorities? Which component of the SGA has the dictionary cache? Buffer cache B. Library cache C. Program global area E. Large pool F. Result cache Which of the following advisors is used to determine if the database read-consistency mechanisms are properly configured?

Undo Management Advisor B. Memory Advisor Which storage parameter is used to make sure that each extent is a multiple of the value specified? What is are the name of the audit trail view s where audit records from Unified Auditing is are stored, when database auditing, RMAN, and Data Pump auditing are enabled? Undo data in an undo tablespace is not used for which of the following purposes?

Providing users with read-consistent queries B. Rolling forward after an instance failure C. Flashback queries D. Recovering from a failed transaction E. Log file B. Parfile C. Bad file D. Data file Which of the following is false about shared servers? Shared servers can process requests from many users. Shared servers receive their requests directly from dispatchers. Shared servers place completed requests on a dispatcher response queue.

Identify the statement that is not true about checkpoints. Instance recovery is complete when the data from the last checkpoint up to the latest SCN in the control file has been written to the data files. A checkpoint keeps track of what has already been written to the data files. The redo log group writes must occur before a commit complete is returned to the user. The distance between the checkpoint position in the redo log file and the end of the redo log group can never be more than 90 percent of the size of the largest redo log group.

Which parameter is used to enable the Automatic Memory Management feature of the Oracle database? SKIP B. Two tablespaces are critical to the database. The loss of a data file in these tablespaces requires an instance shutdown to recover. Which are these tablespaces? TEMP B. UNDO D. Which initialization parameter determines the location of the alert log file? Which statement regarding a global temporary table and redo generation is true? Global temporary tables generate the same amount of redo as persistent tables.

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Global temporary tables generate redo from undo when a DML operation is per- formed on them. All of the above are true. Which database management tools are automatically installed and configured when Oracle Database 12c database is configured? SQL Developer In Oracle Database 12c, which script is recommended to run for upgrading a database from Using listener. Using Oracle Net Manager configuration. Depends on the application. Which product do you install to configure an Oracle Automatic Storage Management instance? Oracle Database 12c database B.

Oracle Database 12c Grid Infrastructure C. In the arithmetic operators, unary operators are evaluated first, then multiplication and division, and finally addition and subtraction. The expression is evaluated from left to right. See Chapter 2 for more information. Except for option C, all other SQL statements are not valid syntactically. The MERGE state- ment performs kind of an upsert—it inserts if the row does not exist, and updates if the row exists.

For more information, read Chapter 6. See Chapter 3 to learn more. Read Chapter 4 to learn more about group functions. See Chapter 6 for more information. For more information, see Chapter 4. The BFILE datatype stores only the locator to an external file in the database; the actual data is stored as an operating sys- tem file. Read Chapter 7 for more information. See Chapter 5 for more information about subqueries. The join condition can be specified by using the ON clause to specify the columns explicitly or using the USING clause to specify columns with common column names.

See Chapter 5 for more information. The index contains all the information needed to satisfy the query in option A, and a full-index scan would be faster than a full-table scan. Read Chapter 7 to learn more about using an index. A rollback will never stuff values back into a sequence. Primary key and unique key constraints can be enforced using non-unique indexes. Unique constraints allow NULL values in the columns, but primary keys do not.

See Chapter 7 for more information. See Chapter 3 for more information. For more infroma- tion, see Chapter 6. There should be at least n-1 join conditions when joining n tables to avoid a Cartesian join. No other characters are allowed in the table name. You can have letters and numbers in the table name. Since NULLs are sorted higher, they appear at the bottom of the result set in an ascending order sort.

No other aggregate function takes NULL into consideration. See Chapter 4 for more information. Read Chapter 3 for more information. To learn more about managing tables, read chapter 7. Read Chapter 2 for more information. D, E, F, G. Answers to Assessment Test lvii For databases where the sid is the same as the database unique name, the service name is the same as the sid; thus you can say option C is also part of the easy connect string. However, in reality it is the service name. Easy connect only supports TCP protocol. See Chapter 1 for more information.

In the example, there are two rows with NULL values. Since a self-join is getting data from the same table, you must include alias names and qualify column names. Oracle creates unique indexes for each unique key and primary key defined in the table. Although there is no error in this statement, the statement will not return the desired result. The solid line represents that the order must belong to a customer, and the crow- foot represents that a customer can have more than one order. Private synonyms override public synonyms, and tables or views owned by the user always resolve first.

NOT is a negation operator, and a comma is used to separate column names and table names. For more information, see Chapter 5. You can create primary key, foreign key, and unique key constraints on a view. The constraints on views are not enforced by Oracle. To enforce a constraint, it must be defined on a table. So an AND operator should be used. In the second part, you have two options: the salary can be either more than or less than , so the second part should be enclosed in parentheses; use an OR operator. None of the indexes, constraints, or triggers on the table are dropped or disabled.

OCA/OCP: Oracle9i DBA Fundamentals I Study Guide

If there are valid foreign key constraints defined to this table, you must disable all of them before truncating the table. Read Chapter 6 for more information. Since there can be only one primary key per table, the syntax in option A works. Exam 1Z Installation and Administration 1. Database Upgrade Assistant and a manual upgrade both support an upgrade from For See Chapter 17 for more information. To rename or relocate a data file in Oracle Database 12c, you need to use only the statement specified in option B.

To rename a data file in prec databases, you need to take the tablespace offline so that Oracle does not try to update the data file while you are renaming. To rename the file in the data- base, the new file should exist. Bring the tablespace online for normal database opera- tion. For more information, read Chapter Although pfiles and spfiles are physical files used to configure the Oracle instance, they are not considered part of the database. For more information, see Chapter 8. Answers to Assessment Test lix 4. The highest level at which a user can request a lock is the table level; the only other lock level available to a user is a row-level lock.

Users cannot lock at the block or schema level. Read Chapter 11 for more information. Read Chapter 13 for more information.

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B and C are both the best answers. They are identical because queries in Oracle are case-insensitive. QMN1 is the process that monitors Oracle advanced queuing fea- tures. See Chapter 14 for more information. The resumable session must be enabled using option B. Option C disables the resumable session. Option D is invalid. Read Chapter 10 for more information. The OUI is a Java-based application that provides the same installa- tion look and feel no matter which operating system is being used for the installation. See Chapter 9 for more information. Although you can use choice A to stop and start the listener, doing so temporarily disrupts clients attempting to connect to the database.

Therefore, the best method is C, to use the lsnrctl reload listener1 command to load the new set of values for the listener without disrupting connection service to the databases the listener is servicing. For more information, see Chapter An error will occur because the job is not running, given that a job that is not execut- ing cannot be stopped. See Chapter 16 for more information. Redo log files record all the changes made to the Oracle database, whether the change is committed or not. See Chapter 15 for more information. Default roles are enabled when a user connects to the database, even if the roles are password protected.

Although options A and B are recommended practices for upgrade performance, option D is a must. The Pre-Upgrade Information tool must be run, and all errors must be taken care of before upgrading the database. DBA Related Stuff 1. Views In Oracle. Having taken many trainings from Oracle University in past, I stumbled upon apps2fusion. To be frank, there is not many online site, where you can practice SQL query in your favorite database.

Oracle Certifications. Answer: Oracle account sign in. Psuedo Columns. Having a collection of online database, just makes running SQL query a fun. Appologies for being naive. Set Operators in SQL. This option allows you to work on your laptop without needing internet connectivity. As a general rule of thumb, Oracle recommends that you size your online redo logs not to switch more then 5 times per hour during peak DML times. You can understand, how happy I am to know about this site, which let me to run and practice my SQL queries online, that I am sharing with you guys. Oracle Certification.

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Overview: The Oracle-1Z Practice Lab will provide you with the necessary platform to gain hands on skills in Oracle. These Oracle Java Certification exams, which were earlier known as Sun Java Certification exams, are industry respected certifications in Java technology. Could anyone please provide me a link where I can practice general oracle tasks. The basics of each SQL command will be covered in this introductory tutorial. I was initially sceptical to join low cost training from apps2fusion, but soon discovered that their quality is top class. I hope which is helpful for you.

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    Do I need access to an Oracle Database? This is a fully online course. Second, this document reviews the many design considerations that must be addressed by architects of Oracle storage solutions Oracle's Live SQL gives you access to a personal Oracle 12c instance for you to practice writing queries. As you 4Tests. We truly recognize the importance of Oracle 1Z vce dumps in the IT career.

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    OCA/OCP: Oracle9 DBA Fundamentals I Study Guide OCA/OCP: Oracle9 DBA Fundamentals I Study Guide
    OCA/OCP: Oracle9 DBA Fundamentals I Study Guide OCA/OCP: Oracle9 DBA Fundamentals I Study Guide
    OCA/OCP: Oracle9 DBA Fundamentals I Study Guide OCA/OCP: Oracle9 DBA Fundamentals I Study Guide
    OCA/OCP: Oracle9 DBA Fundamentals I Study Guide OCA/OCP: Oracle9 DBA Fundamentals I Study Guide
    OCA/OCP: Oracle9 DBA Fundamentals I Study Guide OCA/OCP: Oracle9 DBA Fundamentals I Study Guide
    OCA/OCP: Oracle9 DBA Fundamentals I Study Guide

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