表定義問題阿帕奇HIVE

Question

以下是數據集我在名爲一個蜂巢表推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 

當我試圖查看數據雖然選擇命令，然後我得到以下數據集：

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 

接下來，我想這組記錄自卑的國家，每個COUNTR取最高溫度與該城市名稱沿Y，所以我跑下面的查詢：

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，我跑在蜂巢外殼上面的查詢，我得到以下結果：

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 

即使我跑內部查詢生成row_number然後我也得到類似的行號爲所有記錄。 （像這樣的東西:)

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 

我也試過DENSE_RANK（）和秩（）。沒有新的結果。表格定義有什麼問題嗎？

所有幫助將不勝感激！

Answer 1

領域的終止 ''

---

你的表的定義應該是這樣的：

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 | 
+---------+---------------+------+