List<Pkfields> answer = dao.selectByExample(example);
assertEquals(2, answer.size());
example = new PkfieldsExample();
example.createCriteria().andLastnameLike("J%");
int rows = dao.deleteByExample(example);
assertEquals(1, rows);
example = new PkfieldsExample();
answer = dao.selectByExample(example);
assertEquals(1, answer.size());