Dorsey - SQL: Become A Master In SQL (SQL Programming Language, Databases, Computer Programming, Structured Query Language, Scripting, JavaScript)

SQL

Programming Beginners Guide

By
Richard Dorsey

Copyright 2017 by Richard Dorsey - All rights reserved.

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Table of Contents

Introduction

C ongratulations on downloading SQL: Programming Beginner Guide, and thank you for doing so.

The following chapters will discuss various things that you need to know in order to use SQL properly and make your job easier. SQL is supposed to make it to where you are not working as hard at your job, and if it is used correctly, then it will do just that!

There are plenty of books on this subject on the market, thanks again for choosing this one! Every endeavor was made to ensure it is full of as much useful information as possible. Please enjoy!

Chapter 1

What Is SQL?

S QL stands for structured query language. This language is a domain-specific language that you are going to use if you are programming or trying to manage data inside of an RDBMS (relational database management system).

SQL was started with math, both tuple relational calculus and relational algebra. There is a lot of data definitions and manipulations along with control language that is going to be inside of SQL. SQL involves the use of things such as delete, update, insert, and query.

In essence, you are going to be able to update, delete, insert, and search for the things that you are going to be putting into the program. It is very common for SQL to be described as a declarative language. However, the program also allows for procedural elements.

This is one of the first languages that was able to use the relational model that was created by Edgar F. Codd. Although it is not going to work with all of the rules that are set forth for this example, it is one of the most widely used languages for data bases.

In 1986, SQL became part of the ANSI. Then, in 1987, it became part of the ISO. However, there have been updates since then that have made it to where the language can include larger sets. Just keep in mind that the code for SQL is not going to be 100 percent portable between data bases unless there are some adjustments to the code so that it fits the requirements for that data base.

Learning SQL can be one of the better decisions that you make about your career because you can push yourself forward with it that way that you can rely on using your own knowledge rather than having to go to someone else for their knowledge. In fact, people are going to be coming to you to learn what it is that you know about the program.

By learning SQL, you are going to be able to do more than you may have been able to before. Here are a few points that are going to give you a good reason as to why you should learn SQL.

Money

Learning SQL makes it to where you have the opportunity to earn some extra money. Developers that work with SQL make around $92,000 a year! An administrator for an SQL data base is going to make about $97,000 a year. So, just learning SQL makes it to where you are able to earn around twice as much as what the average American household is going to make in a year.

Highly sought after

Employers want people who know SQL! The more knowledge that you have about SQL, the more sought after you are going to by employers. Knowing SQL is not only going to benefit you but your employer as well because they are not going to have to pay for you to learn the program. The interviewing process is going to be better than any other process that you have gone through, and you may find that they are going to be willing to give you more money just for knowing SQL over the other person. With SQL knowledge, you are going to be opening yourself up for more careers than you might have been able to apply for before.

Get answers

SQL is going to give you the answers that you are looking for to any questions that you may have about business or data that is being stored inside of your data base. Therefore, you are going to be more self-sufficient and not as dependent on others when it comes to business. If you are able to answer questions on your own so that you are not stopping someone else from doing their job, then an employer is going to be able to save money by hiring you because you are going to be able to answer questions on your own rather than having to mess with hiring someone else to solve those issues. Knowing SQL is even going to help you if you want to start your own business or push your business that you have already started to the next step that has just been out of your reach.

More stable than Excel

When you are using Excel for significant amounts of data, you may notice that it is too much for the program, and therefore, the program tends to crash. A crash leads to lost data and extra time that you are going to have to go in and fix anything that may be wrong or entering data that was not saved. SQL is going to be much more reliable for you to use when you are trying to work with large quantities of data, and it is going to save you some time working with it because it is not going to require too much for you to work with the processes that SQL offers.