表定义问题阿帕奇HIVE

Question

以下是数据集我在名为一个蜂巢表推temp_stat：

COUNTRY CITY     TEMP 
---------- -------------------- ----- 
US   Arizona    51.7 
US   California   56.7 
US   Bullhead City  51.1 
India  Jaisalmer   42.4 
Libya  Aziziya    57.8 
Iran  Lut Desert   70.7 
India  Banda    42.4 

当我试图查看数据虽然选择命令，然后我得到以下数据集：

US,Arizona,51.7   NULL NULL 
US,California,56.7  NULL NULL 
US,Bullhead City,51.1 NULL NULL 
India,Jaisalmer,42.4 NULL NULL 
Libya,Aziziya,57.8  NULL NULL 
Iran,Lut Desert,70.7 NULL NULL 
India,Banda,42.4  NULL NULL 

接下来，我想这组记录自卑的国家，每个COUNTR取最高温度与该城市名称沿Y，所以我跑下面的查询：

select country,city,temp 
from (
select country,city,temp, 
    row_number() over (partition by country order by temp desc) as part 
from temp_stat 
) a 
where part = 1 
order by country, city; 

有一次，我跑在蜂巢外壳上面的查询，我得到以下结果：

US,Arizona,51.7   NULL NULL 
US,California,56.7  NULL NULL 
US,Bullhead City,51.1 NULL NULL 
India,Jaisalmer,42.4 NULL NULL 
Libya,Aziziya,57.8  NULL NULL 
Iran,Lut Desert,70.7 NULL NULL 
India,Banda,42.4  NULL NULL 

即使我跑内部查询生成row_number然后我也得到类似的行号为所有记录。 （像这样的东西:)

India,Banda,42.4  NULL NULL 1 
India,Jaisalmer,42.4 NULL NULL 1 
Iran,Lut Desert,70.7 NULL NULL 1 
Libya,Aziziya,57.8  NULL NULL 1 
US,Arizona,51.7   NULL NULL 1 
US,Bullhead City,51.1 NULL NULL 1 
US,California,56.7  NULL NULL 1 
enter code here 

我也试过DENSE_RANK（）和秩（）。没有新的结果。表格定义有什么问题吗？

所有帮助将不胜感激！

Answer 1

领域的终止 ''

---

你的表的定义应该是这样的：

create external table temp_stat 
(
    country  string 
    ,city  string   
    ,temp  decimal(11,1) 
) 
    row format delimited 
    fields terminated by ',' 
; 

---

select * from temp_stat; 

---

+---------+---------------+------+ 
| country |  city  | temp | 
+---------+---------------+------+ 
| US  | Arizona  | 51.7 | 
| US  | California | 56.7 | 
| US  | Bullhead City | 51.1 | 
| India | Jaisalmer  | 42.4 | 
| Libya | Aziziya  | 57.8 | 
| Iran | Lut Desert | 70.7 | 
| India | Banda   | 42.4 | 
+---------+---------------+------+