If I have an Access DataBase how to convert to MySQL?
I have to export sql file and to import mysql?

there used to be a tool called dbtools whi9ch was free and did the job
...looks like there still is

I don't think the mySQL migration toolkit (part of the MySQL GUI tools) available fromt he MySQL website does it but you may want to check

failing that its an export from MySQL to a CSV file and import into MySQL.

by "MySQL to a CSV" you mean Access, ?

I want the structure of db (or and data in) trasfered: Access->mysql?

I used dbtools in the distant past and it worked well on a simple Access Database. DBTools Software - Welcome to DBTools Software

It was reasonably priced and simple to use

MAY VIA ACCESS get make an .sql file of the schema, and after import it to MySQL?

you may find that you need to make some changes to the data types but otherwise that could work. try it and see.

I've been looking for an alternative to M$Access for the last few weeks solid.

Kexi from Koffice is supposed to be able to open data tables and convert them to another format from an MDB file. Haven't tried this yet. OOO Base can't. Datakiosk is unmaintained. SQLyog can't. MySQL Administrator can't. phpMyAdmin can't.
Kexi can't yet do composite primary keys though but you might be able to convert using Kexi and then access the resulting MySQL db with something else.

I'm next going to look at using MySQL Administrator to create my db and xataface to create the queries, forms, reports etc in php but it looks like I have to learn SQL to code some stuff.
HTH
Max

try the MySQL migration toolkit

If I were you, I'd install MySQL ODBC connector. Then from Access, create new database pointing to your MySQL (using ODBC). Then from within access, import from another access file.