SQL Tutorial for Beginners
This SQL Tutorial for Beginners is a complete package for how to learn SQL online. In this SQL tutorial , you will learn SQL programming to get a clear idea of what Structured Query Language is and how you deploy SQL to work with a relational database system.
So, a structured query language is a language that is used to operate the relational databases. Some of the major ways in which SQL is used in conjunction with a relational database is for the purposes of storing, retrieving and manipulating of data stored in a relational database.
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Here we have the list of topics if you want to jump right into a specific one:
- What is SQL?
- Why is SQL programming so widely used?
- Features of SQL
- Applications of SQL
- Why should you learn SQL Programming?
Watch this SQL Tutorial for Beginners video
What is SQL?
To learn SQL Online, first let us compare SQL with NoSQL in the below table:
|Type of database||Relational||Non-relational|
|How is data stored||Structured data in tables||Unstructured data in JSON files|
|Suitability for OLTP systems||Excellent||Average|
|Database compliance||ACID properties||CAP Theorem|
The language to communicate with the relational database is the SQL or Structured Query Language. SQL programming helps to operate the relational databases and derive information from it.
Some of the operations that the SQL does include creation of database, fetching, modifying, updating and deleting the rows along with storing, manipulating and retrieving data within the relational database. SQL programming is an ANSI standard language but there are a lot of versions of SQL in usage as well.
Why is SQL programming so widely used?
Structured Query Language or SQL programming is used so extensively for the following reasons.
- SQL lets you access any data within the relational database
- You can describe the data in the database using SQL
- Using SQL you can manipulate the data with the relational database
- SQL can embed within other languages through SQL modules & libraries
- SQL lets you easily create and drop databases and tables
- SQL allows you to create views, functions and stored procedures in databases
- Using SQL you can set permissions on procedures, tables and views.
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Features of SQL
Here in this section of the SQL tutorial for beginners, we list some of the top features of SQL that make it so ubiquitous when it comes to managing relational databases.
- SQL is very simple and easy to learn language
- SQL is versatile as it works with database systems from Oracle, IBM, Microsoft, etc.
- SQL is an ANSI and ISO standard language for database creation and manipulation
- SQL has a well-defined structure as it uses long established standards
- SQL is very fast in retrieving large amounts of data very efficiently
- SQL lets you manage databases without knowing lot of coding.
Applications of SQL
Here in this section of the SQL tutorial we will learn SQL applications that make it so important in a data-driven world where managing huge databases is the norm of the day.
- SQL is used as a Data Definition Language (DDL) meaning you can independently create a database, define its structure, use it and then discard it when you are done with it
- SQL is also used as a Data Manipulation Language (DML) which means you can use it for maintaining an already existing database. SQL is a powerful language for entering data, modifying data and extracting data with regard to a database
- SQL is also deployed as a Data Control Language (DCL) which specifies how you can protect your database against corruption and misuse.
- SQL is extensively used as a Client/Server language to connect the front-end with the back-end thus supporting the client/server architecture
- SQL can also be used in the three-tier architecture of a client, an application server and a database which defines the Internet architecture.
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Why should you learn SQL?
Today regardless of the relational databases systems by major corporations like Oracle, IBM, Microsoft and others, the one thing that is common to them is the Structured Query Language or SQL.
So if you learn SQL online then you will be able to pursue a very broad career spanning a lot of roles of responsibilities. Also if you are learning SQL then it is important for a data science career as well since a data scientist will also have to deal with relational databases and query it using the standard language SQL.
This SQL for beginners can be beneficial to anybody who wants to learn SQL online. Software developers, database administrators, architects, managers can take this SQL tutorial as a first step for learning SQL and excel in their careers.
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There are no prerequisites for learning SQL from this SQL for beginners. If you have a basic understanding computer languages and databases, then it is beneficial.
Table of Contents
What is SQL – Basic SQL Commands with example
What Is SQL?
SQL full form is Structured Query Language. SQL is a domain-specific language. It is used in application development language to enable a programmer to work with the data. The data is stored in a relational database. To manage this data, we have relational database management systems like SQL Server, MySQL, MS Access, etc. that use SQL as Read More
Features of SQL
Key features of SQL
SQL is one of the most demanding skill in the current world. Every day a huge amount of data is collected and one have to deal with these databases to make an insightful information. Hence it is important for us to learn SQL as it is a special-purpose database programming language which help to generate useful Read More
How to install SQL Server?
Download and Install Microsoft SQL Server
Microsoft SQL Server is a relational database management system developed by Microsoft. The product’s primary function is to store and retrieve the data as requested by the user or another application. These functions can either run on the same system or another over a network. Watch this video on How to install SQL Server Read More
SQL Database Queries
How to Create, Use, and Drop a SQL Database ?
A database contains records, and to create, modify, or delete these records SQL queries are used. An SQL query can either be an action query like delete or create or a select query like select or use. These queries are used to find specific data, perform actions on it, or Read More
Tables in SQL
Overview of Tables in SQL
Tables are the fundamental level to store data in a relational database management system. It contains a header row at the top of the table which gives list of column names, followed by rows that contain data. we will discuss about the basic operations performed on a database by using important SQL operators. Watch this SQL Read More
SQL Data Types
Data Types in SQL
SQL Data types inform a compiler or interpreter about the characteristics of the data used in a program. In simple words, a data type is a particular kind of data item which helps define the operations that can be performed on the data. There are different data types available like character data type for the letters Read More
Create & Drop Table in SQL
How to Create and Drop Table in SQL
A database contains data, and to store data we need a table. Tables are the fundamental level of a database to store data. It comprises columns, which contain a set of data values of a particular type, and rows, which contains a single data item. In this tutorial section, we will discuss Read More
Insert query in SQL – INSERT INTO SQL
SQL INSERT INTO Query
The INSERT statement is used to insert records in a table. The table selected to insert data must have the same number of columns and values. In this tutorial section, we will discuss on the Insert statement syntax with an example. We have the perfect professional SQL Training Course for you! Watch this Insert query in Read More
Select Query in SQL
Select Statement in SQL
The Select statement in SQL is the most commonly query used statement in SQL. It is used to either fetch a data according to some specified rule or display an entire table. The data displayed after the query execution is stored in a result table. Watch this video [videothumb class="col-md-12" id="WS_A0-l5IiQ" alt="Select Statement in Read More
WHERE Clause in SQL
What Is Where in SQL?
'Where' as a word is used to distinguish a place or position and that’s exactly what the SQL Where clause does. Where in SQL is used to specify a condition while fetching the data. The Where in SQL fetches only the necessary records. Wish to crack SQL interviews? Intellipaat's Top SQL Interview Questions are meant Read More
SQL Operators – Logical Operators in SQL
Operators in SQL
These SQL operators are considered as a set of reserved words used in SQL Where clause. They specify the condition and also serve as a conjunction for multiple conditions in a statement. In this tutorial, we will discuss on: How to Impose Conditions using SQL Operators? AND Operator in SQL and its syntax SQL OR Operator and Read More
UPDATE Query in SQL
Update command in SQL
In this tutorial section, we will discuss on what is an UPDATE query in SQL and how to update records using SQL UPDATE query in a SQL Table with a Demo. Watch this Update Query in SQL video [videothumb class="col-md-12" id="HyIGW3TsCgY" alt="Update & Delete Using Join" title="Update & Delete Using Join"] A Brief Introduction to the Read More
Delete and Truncate Query in SQL
Delete and Truncate commands in SQL
The Delete query in SQL only deletes records from the table, and it doesn’t make any changes in the definition, i.e., it only manipulates. Hence, it is DML (Data Manipulation Language). The Truncate command in SQL removes all rows from a table, i.e., it reinitializes the identity by making changes in the data definition. Read More
Order By and Group By in SQL
Order By and Group By Clause in SQL
In this SQL tutorial we will learn how to use Order by and Group By in SQL. Group By in SQL is used to arrange similar data into group and Order By in SQL is is used to sort the data in the ascending or descending order. Wish to crack SQL job Read More
Select Distinct in SQL
Select Distinct in SQL - Remove duplicate data from table
Select Distinct in SQL is used to remove the duplicate data from the table. SQL DISTINCT Keyword is used along with the SELECT statement The SQL Distinct syntax is as follows: SELECT DISTINCT column1, column2…. FROM table_name WHERE [condition]; Example: Consider the Student_details table: Name Roll No. Marks Akshay 1 Read More
Alter Command in SQL – Alter Column – Alter Table
Alter Command in SQL
Alter command in SQL is used to add, delete, or modify columns in an existing table. Alter in SQL is will help to make changes in the existing columns like add columns or delete columns. Watch this Tutorial video [videothumb class="col-md-12" id="v2uSprqdODE" alt="Alter command" title="Alter command"] Alter Table Add Column To add a Read More
Union in SQL – Union All in SQL
Union in SQL
is used to combine the two or more results. The each SELECT statement must have same no. of columns, same datatypes and in the same order. Watch this Union Command in SQL Tutorial video [videothumb class="col-md-12" id="VxK6ePlxzkw" alt="SQL Union Tutorial" title="SQL Union Tutorial"] Syntax: SELECT column_name FROM table1 UNION SELECT column_name FROM table2; Union All Read More
LIKE and BETWEEN Operators in SQL
LIKE and BETWEEN in SQL
LIKE and BETWEEN operators in SQL are used to compare values in a database. In this tutorial section, we will discuss on: LIKE in SQL BETWEEN in SQL Watch this Like and Between operators in SQL [videothumb class="col-md-12" id="jerWdB2j8xk" alt="Like and Between Operators in SQL" title="Like and Between Operators in SQL"] LIKE Operator in SQL Read More
Constraints in SQL – Check and Default Constraints in SQL
What is Constraint in SQL?
Constraints are the rules applied on data columns on table. These are used to bound the type of data that can go into a table. This ensures the accuracy and consistency of the data. If there is any violation between the constraint and the data action, the action is aborted by the constraint. Wish to Read More
Date Format in SQL – SQL DateTime Format
DATE FORMAT in SQL - SQL FORMAT ()
This FORMAT () function in the SQL is utilized for formatting a field in order to be brought into its displayable standard format. The Syntax for the format function is mentioned below: SELECT FORMAT (column_name, format) FROM table name; Here, the column_name - Tells about the ground where formatting are required. And the Read More
SQL Functions – Date, Rank, String, Aggregate Functions in SQL
Popular Functions in SQL
SQL(Structured Query Language) has got a huge number of functions. This article will give a description most of the SQL Functions. Check out this Functions in SQL With Examples video [videothumb class="col-md-12" id="cVe06NVDaoI" alt="SQL Functions With Examples" title="SQL Functions With Examples"] The SQL functions are as follows: Aggregate Functions in SQL (Transact-SQL) Aggregate SQL functions perform Read More
Joins in SQL – SQL Joins
What is Joins in SQL?
SQL Joins is used to combine rows of two or more tables by using common values. Prepare yourself for the industry by going through this Top SQL Interview Questions and Answers! Example: Let us consider two tables first is Student details Name Roll No. Marks Akshay 1 57 Charu 2 68 Disha 3 52 Eva Read More
Left Join in SQL – SQL Left Joins
What is Left Join in SQL?
Left Join is a keyword, which is used to select all rows from the left table and also the matched values between the two tables. Enrol yourself in Online SQL training and give a head-start to your career in machine learning! Watch this Left Join in SQL video [videothumb class="col-md-12" id="jsLLa2_G6OU" alt="Left Join SQL" Read More
Right Join in SQL – SQL Right Join
What is Right Join in SQL?
Right Join is a keyword, which is used to select all rows from the right table and also the matched values between the two tables. Wish to crack SQL interviews? Intellipaat's Top SQL Interview Questions are meant only for you! Watch this Right Join in SQL video [videothumb class="col-md-12" id="U01-172PP7k" alt="Right Join SQL" title="Right Read More
Inner Join in SQL – SQL Inner Joins
What is Inner Join in SQL?
Inner Join is a keyword, which is used to select all rows from the participating tables as long as there is a match between columns. Get familiar with the top SQL Interview Questions to get a head start in your career! Watch this Inner Join in SQL video [videothumb class="col-md-12" id="tEIcjjPycj8" alt="Inner Join SQL" Read More
Full Join in SQL – SQL Full Joins
What is Full Join in SQL?
Full Join is a keyword, which is used to select all records from the right table and also from the left table. Go for this in-depth job-oriented SQL Training Course now! Watch this Full Join in SQL video [videothumb class="col-md-12" id="J2NPKB3O-bo" alt="Full Join SQL" title="Full Join SQL"] Full Join in SQL The Full Join Read More
What is RDMS?
RDMS is an information management system which is oriented on a data model. Here all the information is properly stored as tables. RDMS Example systems are SQL Server, Oracle, MySQL, MariaDB and SQLite. RDBMS full form RDBMS full form is for Relational Database Management System. It arranges information into allied rows and columns. Basic Features of RDMS: Read More
ACID Properties & Normalization
ACID Property is the most important part of the database. ACID stands for Atomicity Consistency Isolation Durability. Atomicity: This means that “all or nothing”. When an update occurs to a database either all or none of the update will become available to anyone beyond the user. This update to the database is called a transaction and it either Read More
SQL Cheat Sheet
SQL Quick Reference Guide
For a software Developer or a programmer, basic knowledge on SQL is a must. This helps in retrieving the information from the database and to perform modifications and several operations on the data This SQL cheat sheet provides you with the necessary concepts required to start on with SQL. It is helpful for the beginners willing Read More
SQL Commands Cheat Sheet
SQL is a basic query language which every programmer must know. This cheat sheet will guide you through the basic SQL commands required to learn and work on SQL. Watch this SQL Tutorial for Beginners video [videothumb class="col-md-12" id="JTDK6r1GuUU" alt="SQL Tutorial" title="SQL Tutorial"] Kick-start your career in SQL with the perfect SQL Training Course now! You can also download Read More