合并蜂巢中的两个表

Question

我有两个具有相同列的表，并且想要创建包含表1和表2的所有记录的第3个表。我这样做。但它不起作用。请帮忙

select * into R5 from 
(select 
r.account_id as account_id,
r.dim_account_key as dim_account_key,
r.activation_date as activation_date,
r.serial_number as serial_number
from R5_1 r
union all
select 
s.account_id as account_id,
s.dim_account_key as dim_account_key,
s.activation_date as activation_date,
s.serial_number as serial_number
from R5_2 s) R

Answer 1

Hive没有任何＆＃34; SELECT INTO＆＃34;声明。我相信你的意思是＆＃34; INSERT INTO TABLE＆＃34;。所以你的查询就像：

INSERT INTO TABLE R5
SELECT * FROM 
(select 
r.account_id as account_id,
r.dim_account_key as dim_account_key,
r.activation_date as activation_date,
r.serial_number as serial_number
from R5_1 r
union all
select 
s.account_id as account_id,
s.dim_account_key as dim_account_key,
s.activation_date as activation_date,
s.serial_number as serial_number
from R5_2 s) R

请记住， INSERT INTO TABLE 会将数据附加到表中，如果要覆盖，请将其替换为 INSERT OVERWRITE TABLE