Oracle Database Tutorial: Learn Oracle DBA From Scratch

Introduction

Organizations hold vast volumes of data, and in current times, handling and managing large volumes of data has become a difficult task. When working on the organization's large volumes of sensitive data, data management needs more attention than other tasks. For that, organizations choose Database Administrators for data management. 

A Database Administrator plays a significant role in each organization and certainly is responsible for performing all the tasks related to the data.  Amid everything, we all know the demand for Oracle DBA nowadays. 

In today’s Oracle DBA tutorial, you will understand what Oracle Database Administrator is, the roles and responsibilities of the database administrator, basic terminologies, database objects, advantages and disadvantages of the oracle database administrator, etc. moreover, if you are interested in advanced Oracle DBA concepts and willing to learn Oracle database, then you should opt for industry best Oracle DBA Certification and Training courses taught by experienced industry experts & database professionals only.

What is Oracle DBA?

Database - A Database is a structured collection of organized information that can be accessed, modified, or analyzed efficiently. If we talk about simple software applications like Word, Excel, or Spreadsheets, they can’t efficiently handle voluminous data. Here, we need a secure storage system where data can be stored or retrieved quickly whenever required.

To make this approach feasible, Oracle discovered a Relational Database Management system (RDBMS) to store, retrieve or modify information more efficiently and securely. The RDBMS system delivers high performance and maximized data concurrency that boosts the overall productivity of the multi-user database environment. It can be termed as RDMS or simple Oracle Databases. Oracle DBAs (Database Administrators) use specialized software programs to store or organize information in a mashed-up way. 

Key Responsibilities of Oracle Database Administrator

Oracle database administrator is the one who is responsible for organizational data management. A database administrator is involved in applying the knowledge and expertise of database management to handle huge volumes of organizational data.

The primary responsibility of the Oracle database administrator is to ensure secure access of data only to authenticated users. The database administrators work closely with the other different departments and ensure the development of the database that runs smoothly and efficiently and meets all the business requirements successfully. 

Organizations should opt for Oracle; don’t know why? Read the blog post on how Oracle is a perfect choice for the success of any organization.

Oracle Database Tutorial Guide: Skills Required to Become a Successful Oracle Database Administrator

An Oracle database administrator should also have the problem-solving capability and have expertise on the relevant databases and technologies where he will be able to handle, manage organizational data requirements and communicate effectively with the techies and non-techies in the organization. They should have good communication skills and they should know how to work on networks and storage technologies. 

Oracle DBA Tutorials Guide for Beginners:

Oracle database administration is not managed by a single person but the Company generally hires a group of specialists to complete the administration work. Oracle database architecture works on grid-based computing that is highly suitable for enterprises and large-sized organizations.

Oracle Database Tutorial: Oracle DBA Physical Files

Let us have a quick look at the physical files that are used by Oracle Database to store voluminous data.

• Data Files: These are the special database files that contain data required to initiate the database engine.
• Parameter Files: These are the files that reside on the machine only and the Oracle database server executes on parameter files only.
• Redo Log Files: These log files contain modified information or the changes we made to the databases.
• Control Files: This is the metadata or storehouse for the database used by the Oracle engine.

Oracle Database Tutorial: Basic Terminologies in Oracle Database Administration

In this section, we will discuss all important terms that are necessary to understand before you start working on the Oracle database. This section covers almost all terms and parameters that are used frequently in Oracle Databases.

• Shared Memory: This is sometimes referred to as the Random-Access Memory (RAM) that stores a handful of entries to facilitate the application access. There are two types of memory management techniques in Oracle Database Administration. These are two types of shared memory
  • Manual Memory Management
  • Auto Memory Management
• System Support Infrastructure: These are the mix of foreground and background processes that facilitate application interaction with the databases. One system support process starts automatically as soon as one Oracle instance is initiated. Each process plays an important role in managing the interaction between an application and the data.
• Operating System Files: These are the suite of files that play a significant role individually as soon as the database runs.
• Instance: This is an important part of memory structure that can be defined as the background process to retrieve data from the database.
• Process: Process is a running instance that can be named as Job or task as well in the Oracle database administration. These are divided into two major categories i.e. Oracle Processes or User Processes.
• Buffer Cache: This is a small storehouse that contains frequently used or customized data. This cache is popular to optimize the overall performance of memory and they are connected to the database as well for quick access.
• Shared Pool: This pool contains data that needs to be shared with the users.
• Large Pool: As the name suggests, this is an optimal place to store the large processes with robust options like Data Recovery and backups.
• Redo Log Buffer: This is a backup storehouse that contains the modified data and helps to recover instances or processes. This is an important part of Oracle database 12C architecture that works amazingly in case of system failure.
• Locks: Locks are required to control the simultaneous

If you’re preparing for your upcoming Oracle DBA interview, here are the top Oracle DBA Interview Questions and Answers.

Oracle Database Tutorial: Database Objects Learning

Objects in the Oracle database are used to perform a variety of functions. Here, we will discuss the common objects that can be used in our day-to-day environment while working with Oracle databases.

1). Tables – Organized Data Storage

Tables are the common objects that are used as an integral part of the database. Once a table is created, data should be stored by following the basic rules like data types, values, etc. Table compliance of all-important rules is always easy to access and modify with simple SQL commands.

2). Views – Limited access to Data

If the database administrator wants to limit the access of data then the view concept comes into the picture. Here, different views of data can be defined based on users and Company requirements.

Take an example, where you want to share only a limited amount of information with another organization then you need to mask the rest of the information with proper SQL commands.

You are free to list the important modules only that you want to make visible in front of others. The modules that are not listed will not display and it will be hidden from the users. Views were introduced to enforce a flavor of security and it is frequently used worldwide.

There are different types of database systems like - Oracle, SQL Server, MySQL, and PostgreSQL. Do you want to know the differences between them? Read our blog on the Difference between Oracle, SQL Server, MySQL and PostgreSQL.

3). Synonyms - Referring Objects from Other Databases

It allows users to refer to objects that are stored somewhere else in the same or other databases. These objects are handy objects that can be used with alternative names in the table and you just need to set a pointer to the real table.

This is a memory management technique where the same objects can be reused and it optimizes the overall storage space for database objects. The concept has been used by database programmers for decades to increase the throughput of the application code.

Read: Difference between Oracle, SQL Server, MySQL, and PostgreSQL

4). Stored Objects – Reusability of Code

These objects promote the encapsulation of code that could run either implicitly or explicitly to perform some predetermined task. The best part is that stored objects can be reused again and again whenever some action is required. It ensures consistent performance and secure processing together. They can be further divided into procedures, functions, and packages to declare constants, variables, and cursors for exceptional handling.

Benefits of Oracle database:

Oracle comes with a set of advantages that help improve the performance and efficiency required to efficiently fulfill the client's needs. Let’s run you through a few of the benefits of the Oracle database and how it helps Oracle Database Administrators.

1. Performance: Oracle provides robust principles and methodologies that are helpful in accomplishing higher performance as compared to any other databases. In Oracle, it's possible to implement performance tuning in the database, which results in faster retrieval of the data and modification of the data, which further leads to faster query execution.

2. Editions: Oracle offers different editions and benefits to the users to buy the edition as per their application and client’s requirements. Oracle’s express edition is free, and if you wish to give a trial or get some hands-on experience on Oracle, you can use it.

Go through our definitive guide to databases – Oracle vs. SQL Server vs. MySQL, so that according to your requirement and situation, you can use anyone that suits you more.

3. Clusters: Oracle's real application clusters helps enhance the high data availability systems. The databases that consist of real application clusters yield a number of benefits over conventional database servers, such as - load balancing, scalability to improve the processing capacity, database scaling over several instances, data redundancy, and availability.

4. Multiple databases consist of multiple database instance management on a single server. Oracle uses the instance casing method to manage the CPU allocations on a server that is executing the database instances.

5. Failure recovery: A recovery manager is one of the most vital elements in the Oracle database that can recover and restore the database files during outages and downtimes. Oracle supports user-managed recovery, which is helpful for users. 

6. PL/SQL: Oracle Database also offers extensible support to PL for carrying out procedural programming.

Drawbacks of Oracle database:

Some drawbacks of Oracle database include:

1. Management of the structure:  Sometimes, the management of structure in Oracle is complex and also tends to be difficult to manage some tasks. Hence it’s strongly recommended to use the basic version configured with minimum customization.

2. Incompatibility and complexity: Some incompatibility and complexities are processed by Oracle, which is considered a limitation in terms of time, character, and data Syntax sensitivity.

3. Price: Often, for an Oracle license, there is no price for a specific budget, and any changes over time are based on the change of a policy, updates, patches, etc. by the organization.

Career Success Tips for Oracle Database Administrator(DBA)s one should know

As discussed earlier, Oracle Database Administrator is one of the most prominent and attractive careers for any individual who is really interested in growing his/her career in the administrator role. Here are a few helpful tips for Oracle DBAs

• How to take Backup and restoration
• Sound Knowledge of Basic optimizations
• The ethics of Working with developers
• Knowledge of Storage systems
• How to read a query plan
• Knowledge of normalization
• Knowledge of SQL
• Broaden Knowledge of Operating Systems
• Scripting languages
• Stored procedures and triggering

Resources To Revamp Your DBA Career to New Heights:

For anyone who wishes to kickstart his career and achieve new heights as an Oracle DBA, here is the list of helpful resources 

• Oracle Database Installation Process
• Oracle Database Recovery, Restore, Backup Process
• Oracle Database Maintenance Process
• Oracle Database Performance & Tuning Process
• Real Application Clusters (RAC)
• Oracle DBA Interview Questions and Answers

Final Words On Oracle Database Tutorial:

Oracle database is one of the most highly preferred databases in the organization. There is a high need for database administrators who are involved in implementing and performing database operations and meeting organizational and customer database requirements. Hope you enjoyed reading this Oracle pdf tutorial for beginners. In this blog, we discussed all essential aspects and the parameters that are necessary to understand before you start working as an Oracle Database administrator.

Most organizations look forward to individuals with expertise in Oracle database administrator(DBA). Oracle database administrator is one of the prominent roles in the field of database management, which is among the most rewarding career opportunities in the current times. Hence, We recommend you go through this Oracle Database Tutorial and get professional Oracle DBA Online Training and Certification from a renowned institute like JanBask Training to attain a prosperous oracle database administrator career and prepare to step forward to land your dream job of oracle database administrator!

FAQs

1. I need help in choosing the correct data management course for my job role. Can you assist?

Ans:- Absolutely. Feel free to contact our representative, who will be more than happy to work with you to meet your training needs.

2. How do I become Oracle DBA Certified?

Ans:- To become a Certified Oracle DBA professional, you must complete training requirements and pass the required exam/(s). You can find more information on becoming Oracle DBA Certified on our Oracle DBA Online Training and Certification page.

3. What are the key features of your  Oracle DBA  Online Training and Certification course?

Ans:-

• Instructor-led Live Online Classes
• Personalized Student Dashboard
• Real-life Case Studies and Assignments
• Industry Experienced Trainers

4. Give an overview of the Oracle DBA Online Training and Certification Course.

Ans:- In this Oracle DBA Online Certification and Training course, you’ll gain an in-depth understanding of the functions that can be performed by a DBA using Microsoft SQL Server. You’ll also gain hands-on exercises that will prepare you for real-time scenarios that resonate with the professional Oracle DBA landscape.

5. Why should I take up data management courses?

Ans:-  Some of the major organizations are looking for Oracle DBA professionals who are capable of working on huge data sets and deriving meaningful insights, thus helping the respective organization in decision-making. Hence, gaining Data Management skills will prepare you for the most sought-after job opportunity.

6. What are the eligibility criteria for taking up this course?

Ans:-  Our Oracle DBA Training and Certification course is perfect for beginners, programmers, software developers, and testing professionals who are enthusiastic about learning Oracle. It’s also perfect for marketing professionals and salespeople who wish to better understand their organization’s data.

7. What prerequisites are required for taking up this course?

Ans:-  Learners who wish to take up this course need to possess an undergraduate degree or a high school diploma.

8. How long will it take me to study for the exams?

Ans:-  How long it will take me to study for the exams depends on various factors like how long you study, do you have any previous experience, how easy you find studying, and how much you practice the techniques on a working Oracle installation. It's impossible to say how much time you will take. It seldom takes more than a couple of weeks to prepare for an exam because some people study for over 6 months to complete the OCP. It varies a lot.

9. Who are the trainers for this course?

Ans:-  All the trainers are certified and highly qualified, with several years of experience in working with front-end development technology.

10. What is the pay scale of  Oracle professionals across the globe?

Ans:- As stated by Glassdoor, the average annual base pay in the United States for a Database Administrator is $93,164. If you’re an Oracle Database Administrator, the salary is higher:  $108,837. Salary.com also shows significantly higher rewards for Oracle DBAs, averaging $116,301.

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