Hive试验：表与原始数据不一致能否成功？

╰半橙微兮° 2023-07-04 04:55 2阅读 0赞

## Hive试验：表与原始数据不一致能否成功？ ##

### 一、问题描述： ###

创建一个新表一共三列，但是原始数据为四列，这个时候能够将原始数据的前三列成功导入hive表中吗？

### 二、开始试验 ###

1.创建表

创建一个名为ui的内部表，包含三个字段：userid itemid rating。

create table ui(
    userid string,
    itemid string,
    rating string)
    row format
    delimited fields terminated by '\t';

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjgzMDY5Nw_size_16_color_FFFFFF_t_70][]

2.导入数据：

原始数据为4列，以\\t作为分隔符。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjgzMDY5Nw_size_16_color_FFFFFF_t_70 1][]

load data local inpath '/root/data/cf/2003-10.data'  into table ui;

![20200208150900568.png][]

3.检查导入的数据

发现仅仅只有前三列，完全可以成功。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjgzMDY5Nw_size_16_color_FFFFFF_t_70 2][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjgzMDY5Nw_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200208150847748.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjgzMDY5Nw==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjgzMDY5Nw_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200208151825270.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjgzMDY5Nw==,size_16,color_FFFFFF,t_70
[20200208150900568.png]: https://img-blog.csdnimg.cn/20200208150900568.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjgzMDY5Nw_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200208150911281.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjgzMDY5Nw==,size_16,color_FFFFFF,t_70