What are the functions of SQL, MYSQL & APACHE?

Question

P.S. Sorry for the newbie question

Answer 1

when you want to load a webpage, your Computer sends a request to the webserver. the request is then processed by apache, which controls all the files that should be available to the internet, and sends you the requested file back.

MySQL is a database which only purpose is to store and manage data.
for example an onlineshop has for every product an entry in their database.

SQL is the language to get specific data from the database, so that you only receive what you need.
for example on the site oft one product, you only need the entry oft that product and not the whole database