what is mysql

1mysql -u username -p database_name < file.sql
2

1Structured Query Language
2
3A language which enables a user to create, modify and
4essentially interact with a database.
5Two of the most common Database Management Engines are
6MySQL: https://www.mysql.com/
7PostgreSQL: https://www.postgresql.org/

1SQL full form is a structured query language, and it allows you to interact through commands with the database. Here are some of the SQL Database functions:
2
3This allows users to retrieve information from the relational database.
4It enables the development of tables and databases.
5It allows data base and tables to be modified, added, removed, and changed.
6It gives protection, and allows permission to be set.
7Allows new ways for people to manage the info.

1SELECT 
2    column1,column2,...
3FROM
4    table_name
5WHERE 
6    column1 IN ('value1','value2',...);
7

1MySQL is an open source DBMS which is built, supported and distributed by MySQL(ORACLE).

1MySQL is a database management system if u want to read more about here is the source https://en.wikipedia.org/wiki/MySQL