MySQL stands for My Structured Query Language.
MySQL is an Open Source Relational Database Management System (RDBMS).
As it is a database means it is collecting data with its own structure. We can create database tables in which we are going to store data with different different fields.
We have to follow the constraints given for using MySQL with an effective way of manipulating with databases. We have to write queries which are called statements or commands which interacts with data stored in database and at the result of these queries we can achieve our targets of using databases.
MySQL is widely used RDBMS with PHP so better to have knowledge of it in a proper way to gain full features of PHP and MySQL combination for achieving complex projects as well as tasks.