In this Online MySQL tutorial, we are going to learn all about the MySQL database. Our Online MySQL tutorial website is designed for beginners as well as professionals.
MySQL is one of the most popular RDBMS ( Relational Database management Systems ) based on SQL ( Structural Query Language. SQL ( Structural Query Language ) is one of the best languages to access and manipulate the records in the database.
If you are searching for the best MySQL tutorial for beginners on the internet, Don’t worry this is the best place to learn MySQL because our MySQL tutorial is designed for beginners as well as professionals.
MySQL is an open-source, Relational Database Management System ( RDBMS ) that support SQL query to interact with the database. If you are new to the database, Then this is the best place to learn MySQL from scratch to advanced. Our Online MySQL tutorial covers all the topics of MySQL that provide the facility to manage the database using SQL query.
There are lots of SQL queries, create a table, update the table, delete a table, create a database, drop the database, insert records, update records, delete records and access records, and so on.
Before going to learn this article, Let’s see some basic concepts of databases.
Headings of Contents
What is a Database?
A database is an application that stores organized collections of data and is accessed electronically. In the database, records can access and manage easily by using SQL ( Structural Query Language ). A Database is usually controlled by the DBMS ( Database Management System ).
What is a Relational Database?
A Relational Database ( RDB ) is a collection of information that organized data in predefined relationships. In Relational Databases, data are stored in the form of tables and data can be stored in one or more tables which is also called relations. Each table is a collection of rows and columns where each row is called a record and each column is called an attribute. In Relational Databases, Relationships are the logical connection between tables.
To access the data from relational tables, RDB ( Relational Database ) has the ability to establish connections or relationships, like joining the tables.
As you can see in the above image, we have two tables Employee and Department have some records. Each record has its unique id which uniquely represents that particular record.
Attributes of Employee Table:
- emp_id ( Primary Key )
- dep_id ( Foreign Key )
Attributes of Department Table:
- dep_id ( Primary Key )
The Employee table contains the data about the employees of the organization and the Department table contains the data about the department like the department id and its name.
The Employee table has an attribute called emp_id which is used to uniquely identify each record into the table Employee and this is a primary key field one more thing is important here as you can see, the Employee table has one more column which is dep_id which is connected to Department table through Foreign Key relationship.
Foreign Key:- Foreign Key is a constraint in the SQL that prevents the action that can destroy kink between tables. A Foreign Key is a field in one table that represents the primary key in another table. A table with a foreign key constraint is called a child table and a table with a Primary Key is called a parent or reference table. In the case of tables Employee and Department, the dep_id of the Employee table is a Foreign Key field that represents the dep_id field of the Department table, therefore Employee table is called a child table and the Department table is called the Parent table or Referenced table.
Primary Key:- Primary Key is a constraint in SQL that uniquely represent each record in the table it can not be Null and it must contain a unique value. A table can have only one primary key and it can contain one or more columns. emp_id field of Employee and dep_id field of Department table represents the Primary Key field.
What is RDBMS ( Relational Database Management System)?
An RDBMS ( Relational Database Management System) is a collection of Programs that are used to handle the relational database.
Using RDBMS, Any IT team or other can create, update, delete, and administer information with a relational database.
All the modern database systems like MySQL, Oracle, Microsoft SQL Server, PostgreSQL, etc are examples of RDBMS ( Relational Database Management System).
An RDBMS stores data in tabular form and uses SQL ( Standard Query Language ) to interact with data stored inside tables. RDBMS stores data in the format tables and it can be tabled are connected through each other using some key constraints. As you see in the above table, How Employee and department tables are connected through each other by a Foreign key.
What is a MySQL Database?
MySQL is one of the most popular open-source, relational database management systems the open-source software that is developed by Oracle Corporation in 1995.
MySQL database is the user database management system in comparison to other databases. MySQL supports SQL ( Structural Query Language ) to interact with the database.
Using SQL query you can manage your database records easily.
MySQL is a stand-alone client that allows users directly to interact with the database by using the SQL query. MySQL is the component of LAMP ( Linux, Apache, MySQL, and Perl/ Python/ Perl ).
MySQL is the best option for developing database-driven applications like Drupal, WordPress, Joomla, and so on.
SQL – Structural Query language:
SQL is the most important language if you want to work with RDBMS ( Relational Database Management System ) because SQL provides a facility to interact with the database through a query.
SQL provides lots of queries that are applied to the database records. Using SQL, you can access the database, create a database, drop the database, create a table, update the table, access the table, delete the table, create views, and so on.
At the end of this Online MySQL tutorial, You will be completely able to work with the SQL query.
Why should we use MySQL Database?
One of the reasons is it is one of the most popular Relational Database Management Systems based on SQL ( Structure Query Langauge ). It comes with various features like stored procedures, stored functions, triggers, views, window functions, cursor, etc.
It is easier to learn, set up and maintain a database in comparison to other Databases like PostgreSQL, SQL server, etc. The most common use of MySQL Database is for web applications in fact it can be used for other applications for a wide range like data warehousing, e-commerce, etc.
To learn MySQL, You don’t need to be an expert in DBA ( Database Administrator ). You can start it without any technical experience.
Companies are Using MySQL Database:
These are the top companies that are using MySQL Database in their projects.
MySQL Tutorials Index
- MySQL Create Database
- MySQL Drop Database
- MySQL Create Table
- MySQL Alter Table
- MySQL Truncate Table
- MySQL Drop Table
- MySQL Add Colum
- MySQL Drop Column
- MySQL Update Statement
- MySQL Select Statement
- MySQL Select Distinct Statement
- MySQL AND Operator
- MySQL LIKE Operator
- MySQL IN Operator
- MySQL OR Table
- MySQL BETWEEN Operator
- MySQL Where Clause
- MySQL Order By Clause
MySQL Advanced Concepts
How To Articles
- How to check the length of strings
- How to concatenate multiple columns
- How to show columns of a table
- How to concatenate strings in MySQL
- How to add new columns in the Existing table
- How to import a CSV file in MySQL
- How to extract the year from the date in MySQL
- How to extract month from date in MySQL
- How to handle Null values in MySQL
- How to get the last day of the month in MySQL
So in this Online MySQL tutorial, we have seen the introduction of Database and MySQL database. In the upcoming MySQL tutorial, we will see all the topics of the MySQL database step by step with the help of examples.
I’ll recommend, you can easily start with MySQL Database if you don’t have any database knowledge, after gaining some knowledge in MySQL you can move on to other RDBMS like PostgreSQL, SQL Server, etc. All the RDBMS like MySQL, SQL Server, PostgreSQL, etc are mostly the same.
I hope you found this article helpful, if you like this article, please share it with your friends who want to learn the MySQL database from scratch to advanced.
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