Question

我在spring mvc项目中使用namedParameterJdbcTemplate和sql脚本我的时候我从db获得所有来自db的命令我得到了14的结果，但我只有7个写入的插入语句，我尝试做的是干净安装，我从数据脚本中删除了数据，只剩下一个，当我运行我的时候测试它显示两个数据。

 @Override
    public final Collection<OrderWithTruckCodeDto> getAllOrdersWithTruckCode() {
        LOGGER.debug("getAllOrdersWithTruckCode()");
        Collection<OrderWithTruckCodeDto> ordersDto = namedParameterJdbcTemplate
                .getJdbcOperations()
                .query(selectAllWithTruckCodeSql, new OrderWithTruckCodeDtoRowMapper());
        return ordersDto;
    }

我的scipts看起来像这样

INSERT INTO orderz (petrolQty, orderDate ,truckId )
VALUES (13, '2006-01-21',3);
INSERT INTO orderz (petrolQty , orderDate , TRUCKID )
VALUES (13.0, '2006-1-21', 3);

我的考试

  @Test
    public void getAllOrderWithTruckCodeDto() {
        Collection<OrderWithTruckCodeDto> orders =
                orderDao.getAllOrdersWithTruckCode();
        Assert.assertFalse(orders.isEmpty());
        Assert.assertTrue(orders.size() == 7);
    }

我正在使用h2 db，当在h2控制台上尝试这一切时，一切正常

这些是我的疑问

order.selectAllWithTruckCode =  SELECT o.orderId,  o.orderDate, petrolQty, t.truckCode \
FROM orderz o left join truck t ON (o.truckId = t.truckId) \
group by o.orderId

order.filterByDate = SELECT o.orderId,  o.orderDate, petrolQty, t.truckCode \
FROM orderz o left join truck t ON (o.truckId = t.truckId) \
where o.orderDate >=  :start and o.orderDate <= :end \
group by o.orderId

Answer 1

我的创建脚本看起来像这样

CREATE TABLE IF NOT EXISTS orderz (
  orderId INT NOT NULL AUTO_INCREMENT,
  petrolQty DOUBLE NOT NULL,
  orderDate timestamp NOT NULL,
  truckId INT,
  PRIMARY KEY (orderId),
  FOREIGN KEY (truckId) REFERENCES truck(truckId)
  ON UPDATE CASCADE
  ON DELETE CASCADE

当我改为这个

DROP TABLE IF EXISTS orderz;
CREATE TABLE orderz (
  orderId INT NOT NULL AUTO_INCREMENT,
  petrolQty DOUBLE NOT NULL,
  orderDate timestamp NOT NULL,
  truckId INT,
  PRIMARY KEY (orderId),
  FOREIGN KEY (truckId) REFERENCES truck(truckId)
  ON UPDATE CASCADE
  ON DELETE CASCADE
);

问题解决了，但我不知道为什么这可能会造成共和党

Answer 2

可能过滤掉

</LinearLayout>
    </RelativeLayout>
</ScrollView>
    </RelativeLayout>

所以你只是执行你在评论中的陈述

Jdbc脚本提供重复的值

2 个答案: