Sql and MySQL. It's the same? And what is SQLi?

Question

i'm not sure but i think a sql is a language and MySQL its a application to easier work. It's true?

Answer 1

SQL is the language of Databases and MySQL is Just a provider. There are different Providers using SQL Like MySQL and SQLite

Answer 2

SQLI is (Structured Query Language Injection)
It is a website vulnerability that enables the attacker to view, delete, and modify the database.

Answer 3

SQL - Structured Query Language is a standard language for accessing and manipulating databases.

MySQL is a database management system, like SQL Server, Oracle, Informix, Postgres, etc. MySQL is a RDMS (Relational Database Management System).