SQL Programming & Database Management For Noobee
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About this ebook
Do you want to understand how to manage databases without getting overwhelmed by complicated jargon?
If so, “SQL Programming & Database Management For Noobee” by Kishor Sarkar is the book for you! It breaks down the fundamental elements that are essential to make you a confident SQL programmer and proficient in Database Management.
SQL is a software language that is powerful yet simple, flexible, portable and, most of all, integrated into numerous database applications. The current trend now is to become more digital in managing databases.
at makes this book unique is how easy it makes it for you to learn. The author brings you a guide that takes you through a natural sequence of lessons, step-by-step, carefully explaining each concept and staying away from unnecessary technical jargon whilst defining the terms you need to learn. This one-step-at-a-time approach allows anyone from an absolute beginner to a more knowledgeable programmer, to easily grasp each lesson and become more proficient as they progress through the book.
You Will Learn The Following:
The history of SQL and its uses
The fundamentals of Relational Databases and Database Management Systems
The SQL Structure
The SQL Data Types
Data Definition Language Statements
Data Manipulation Language Statements
Data Query Language Statements
Transactional Control Commands
Working with Database Views
Enhancing Database Designs Using Primary and Foreign Keys, Index and Normalization
Understanding Cursors, Triggers and Errors
And much more!
You have made the best choice by choosing to learn SQL programming and Database Management. Whether you are looking to land a high-paying job, want to delve into freelancing or want to work on your own projects, you have found the right book. Take the first step in the right direction by downloading this eBook version now- also readable on your phone, PC or tablet!
Kishor Sarkar X
A software Professional and write more then 20 book
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Book preview
SQL Programming & Database Management For Noobee - Kishor Sarkar X
Chapter One
SQL Overview
In this chapter you will learn a brief background on how and why SQL came into existence.
Gaining knowledge on the history of this computer language will help you understand its importance to
most IT professionals who focus on the field of data manipulation. You will also have an idea on how to
maximize the potentials of SQL in the ever-changing world of Information Technology.
The current trend in most businesses today is to invest in technology that will gather data in the
most efficient and effective way. However, gathering information is only the start of the extensive
process of data manipulation. Companies, especially multi-national ones, require experts who possess
the skills of analyzing, presenting, managing and storing data. In other words, they need to use computer
programs that will transform raw company data to useful information. Now, thanks to Structured Query
Language, or simply SQL, that brought about such transformation in accessing and manipulating data in
a very meaningful way.
History of SQL
Pronounced as ees-que-ell or see’qwl, SQL is a computer language initially invented by an
American multinational technology and consulting company known as IBM (International Business
Machines Corporation) way back 1970s using Dr. E. F. Codd’s paper on "A Relational Model of Data
for Large Shared Data Banks" for the prototype design. It was originally called SEQUEL (Structured
English QUEry Language) that handled queries on the collection and organization of data - or simply
known as a database. More features were added to the computer software to improve its performance,
like building and managing database security, among others. When IBM researchers learned that there is
another company that had the same Sequel
trademark, they renamed it to S-Q-L
(presently
expanded as Structured Query Language).
Since it was first released to the public, SQL already had many versions. In 1979, Relational
Software, Incorporated (which later became the Oracle Corporation) released ORACLE, the first SQL
product. Now, as the demand for computers that manage data has increased, the more SQL has become
an industry standard in the field of Information Technology. Such formal standard is set and maintained
by the International Standards Organization, or simply known as ISO. It was on 1986, based on IBM’s
implementation, that SQL has been recognized as the standard language in database communication.
The following year, ISO accepted ANSI SQL as the international standard. ANSI stands for American
National Standards Institute, which is an organization that approves certain standards in various US
industries. Many revisions of the standards followed, such as in 1992 (SQL-92) and in 1999 (SQL-99).
The latest one is now called SQL-2011, which was officially released in December 2011.
Use of SQL:
The corporate world is now shifting from merely producing products and providing services to
investing in digital technologies that handle vast amounts of data, to be transformed to meaningful
pieces of information that will generate more profitable income for the company. This is the primary
objective of SQL – to access and manipulate data that will further lead to business insights. This flexible
computer language has been the most widely used communication tool in handling databases
(specifically relational databases that will be further discussed in Chapter 3 of this book).
Try to imagine that you are going to a foreign country for a vacation. You may need to learn that
country’s language to find your way around as you explore the new place. When you try ask someone
for directions, who is local to that place and only speaks the country’s language, then surely you will
have a hard time understanding him. In this scenario, the foreign land will be your database in which
you need to seek information while SQL is the language that you will use to get what you need from the
database.
From time to time, you will encounter the term query, which is also a part of the abbreviation of
SQL. Query is basically the question written using an SQL statement that is being asked from the
database. SQL then retrieves the needed information when any of the data in the database meets the
requirements of the conditions of the given query. So in real-life applications, such as an online store,
when you execute your query for a specific item by entering your search criteria, SQL programming
usually takes place in the background to manage the database connections. You are actually telling the
database, through the help of SQL, what information you want to see and how you want it to be
presented to you.
People Using SQL
SQL is not only applicable for IT professionals or geeks who possess remarkable programming
skills. With the growing corporate world of today, non-IT personnel such as businessmen and managers,
can also benefit from learning the semantics of SQL. This is because the computer language enables
them to understand the ins and outs of their businesses using the data that drives every company.
Moreover, it opens several career opportunities in the analytical, managerial, strategic or research fields
- for those who want to step-up from their current positions. On the IT field, SQL knowledge can lead to
more challenging roles such as database designers, administrators or scientists, systems engineers,
project managers and software developers, among others.
In this chapter you have learnt an overview of SQL – its history, its primary purpose why it was
created and those who will profit from learning this powerful database software.