如何在蜂巢中合并两个表

Question

由于我是Hive的新手，所以我总是遇到很多问题， 我想加入两个表，并根据“国家/地区”列创建一个分区表。

select * from mergetable limit 5;

好

  

148.113.13.214美国

     

4.175.198.160美国

     

24.146.153.181美国

     

203.156.137.68泰国

     

114.127.210.217印度尼西亚

show create table mergetable;

好

`CREATE TABLE `mergetable`(
  `ipaddrss` string, 
  `country` string)
ROW FORMAT DELIMITED 
  FIELDS TERMINATED BY '\t' 
  LINES TERMINATED BY '\n' 
STORED AS INPUTFORMAT;`  




CREATE TABLE `mergetable1`(
  `website` string, 
  `dt` string, 
  `tm` string)
ROW FORMAT DELIMITED 
  FIELDS TERMINATED BY '\t' 
  LINES TERMINATED BY '\n' 
STORED AS INPUTFORMAT 

Answer 1

SELECT *
FROM (
  select_statement
  UNION ALL
  select_statement
) unionResult

在此处查看两个表串联的详细语法和其他用例：https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Union