Mybatis-Plus select不去查全部字段和去重问题

CREATE TABLE `user` (
  `id` bigint(20) NOT NULL COMMENT '主键',
  `name` varchar(30) DEFAULT NULL COMMENT '姓名',
  `age` int(11) DEFAULT NULL COMMENT '年龄',
  `email` varchar(50) DEFAULT NULL COMMENT '邮箱',
  `manager_id` bigint(20) DEFAULT NULL COMMENT '直属上级id',
  `create_time` datetime DEFAULT NULL COMMENT '创建时间',
  PRIMARY KEY (`id`),
  KEY `manager_fk` (`manager_id`),
  CONSTRAINT `manager_fk` FOREIGN KEY (`manager_id`) REFERENCES `user` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

    @Test
    public void selectByWrapper10() {
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.select("name", "age").like("name", "雨");
        List<User> users = userMapper.selectList(queryWrapper);
        users.forEach(System.out::println);
    }

    @Test
    public void selectByWrapper11() {
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.select(User.class, info -> !info.getColumn().equals("manager_id")
                && !info.getColumn().equals("create_time"));
        List<User> users = userMapper.selectList(queryWrapper);
        users.forEach(System.out::println);
    }

	QueryWrapper queryWrapper = new QueryWrapper();
	queryWrapper.select("DISTINCT no,type").orderByAsc("oldlu");
	return mapper.selectList(queryWrapper);

	QueryWrapper<User> queryWrapper = new QueryWrapper<>();
	queryWrapper.select("DISTINCT no,type").orderByAsc("oldlu");
	return mapper.selectList(queryWrapper);

//查询到list集合
List<User> userList = userService.selectById(id);
//结果集
List<String> resultList = new ArrayList<>();
//遍历集合取值
 userList .forEach(item->{
      resultList.add(item.getYouNeedId());
 });
 //条件构造器in上手使用
 QueryWrapper<User> qw = new QueryWrapper<>();
 qw.in("you_need_id", resultList);
 //这里有个分页的查询，你也可以不用分页，用mybatisplus里面封装的其他方法
 IPage<User> userIPage = userMapper.selectPage(page, qw);
 //返回查询结果，getRecords也是mybatisplus里面封装的方法
 return contractRecordIPage.getRecords();

<!-- 分页查询-->
<select id="getKaoShiPageList" resultMap="kaoShiBean" parameterType="com.example.demo.kaoshi.beans.kaoShiBean">
    select * from tb_pxks_kaoshi
    <where>
        <if test="zy !=null and zy!= ''">
            and zy='${zy}'
        </if>
        <if test="ksrqFrom !=null and ksrqFrom!= ''">
            and ksrq >='${ksrqFrom}'
        </if>
        <if test="ksrqTo !=null and ksrqTo!= ''">
            and ksrq <='${ksrqTo}'
        </if>
    </where>
    order  by ksrq desc