Class.forName("com.mysql.jdbc.Driver");
                try(Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/sys", "root", "Elior204")){
                    Statement stmt = con.createStatement();
                    ResultSet rs = stmt.executeQuery("SELECT img FROM Sentences where id=1");
                    int numOfColumns = rs.getMetaData().getColumnCount();