public static List<Tva> selectTva() throws SQLException {
        String query = null;
        List<Tva> tva = new ArrayList<Tva>();
        ResultSet resultat;
        try {
            query = "SELECT * from TVA ";
            PreparedStatement pStatement = (PreparedStatement) ConnectionBDD.getInstance().getPreparedStatement(query);
            resultat = pStatement.executeQuery(query);

            while (resultat.next()) {
                // System.out.println(resultat.getString("PAYS"));
                Tva tt = new Tva(resultat.getInt("ID_TVA"), resultat.getString("TVALIBELLE"), resultat.getFloat("TVATX"));
                tva.add(tt);
            }

        } catch (SQLException ex) {
            Logger.getLogger(RequetesTva.class.getName()).log(Level.SEVERE, null, ex);

        }

        return tva;
    }