SQL is the abbreviation of "Structured Query Language" which is a domain-specific language used in programming and designed for managing data held in a relational database management system (RDBMS)
MySQL is a RDBMS which includes a server that more users can work with it at the same time.
Besides MySQL there are also serverless RDBMS, e.g. SQLite.
SQL stands for Structured Query Language. It's a standard language for accessing and manipulating databases.
MySQL is a database management system, like SQL Server, Oracle, Informix, Postgres, etc. MySQL is an RDMS (Relational Database Management System).
SQL stands for Structured Query Language. To access database in RDBM(Relational Database Management System) Software, you must SQL commands. MySQL is a RDBM Software where database can be stored and accessed using SQL commands.