public boolean insertExperience(String personnelID, Experience exp) {
    boolean check = true;
    PreparedStatement ps;
    if (dbc.connect()) {
      try {
        String sqlQuery = "INSERT INTO " + EXPERIENCE_INFO + " VALUES(?,?,?,?,?,?,?,?,?,?,?)";
        ps = dbc.getConnection().prepareStatement(sqlQuery);
        ps.setString(1, personnelID);
        ps.setNString(2, exp.getCompName());
        ps.setNString(3, exp.getPos());
        ps.setNString(4, exp.getJob());
        if (exp.getStartDate() == null) {
          ps.setNull(5, java.sql.Types.DATE);
        } else {
          ps.setDate(5, exp.getStartDate());
        }
        if (exp.getEndDate() == null) {
          ps.setNull(6, java.sql.Types.DATE);
        } else {
          ps.setDate(6, exp.getEndDate());
        }
        ps.setNString(7, exp.getReason());
        ps.setNString(8, exp.getReferName());
        ps.setString(9, exp.getReferPhone());
        ps.setString(10, exp.getReferEmail());
        ps.setNString(11, exp.getReferPos());

        if (ps.executeUpdate() < 1) {
          check = false;
        }
      } catch (SQLException ex) {
        Logger.getLogger(PersonnelDAO.class.getName()).log(Level.SEVERE, null, ex);
      }
    }
    return check;
  }