How can I solve this error in SQL syntax? [closed]

Question

I have an error with a server about a request to the DB.

This is the message: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ', regione='e', provincia='q', comune='w'' at line 1

This is the quesry SQL in question:

PreparedStatement ps = con.prepareStatement("SELECT * FROM azienda WHERE id_categoria=?, 
regione=?, provincia=?, comune=?");
        ps.setInt(1, id);
        ps.setString(2, regione);
        ps.setString(3, provincia);
        ps.setString(4, comune);

Thanks in advance!