如何将列中的串联值转置为行
How to transpose concatenated values in columns to rows
输入:
item number
ABC 123
我想这样输出:
item number
A 1
B 2
C 3
使用 split()
拆分字符串,使用 posexplode()
分解并使用横向视图。
按空字符串拆分 ''
将生成包含额外空元素的数组,过滤掉它们,按数组中的位置连接项目和数字。
演示(用您的 table 替换 s 子查询):
select i.itm as item, n.nbr as number
from
(--replace this subquery with your table
--this is two rows example
select stack(2,'ABC', '123',
'DEF', '456') as (item, number)
) s --your_table
lateral view posexplode(split(s.item,'')) i as pos, itm
lateral view posexplode(split(s.number,'')) n as pos, nbr
where i.itm!='' and n.nbr!='' and i.pos=n.pos ;
结果:
OK
item number
A 1
B 2
C 3
D 4
E 5
F 6
Time taken: 0.094 seconds, Fetched: 6 row(s)
hive>
更新:简化版
select i.itm as item, substr(s.number,i.pos+1,1) as number
from
(--replace this subquery with your table
--this is two rows example
select stack(2,'ABC', '123',
'DEF', '456') as (item, number)
) s --your_table
lateral view posexplode(split(s.item,'')) i as pos, itm
where i.itm!='';
输入:
item number
ABC 123
我想这样输出:
item number
A 1
B 2
C 3
使用 split()
拆分字符串,使用 posexplode()
分解并使用横向视图。
按空字符串拆分 ''
将生成包含额外空元素的数组,过滤掉它们,按数组中的位置连接项目和数字。
演示(用您的 table 替换 s 子查询):
select i.itm as item, n.nbr as number
from
(--replace this subquery with your table
--this is two rows example
select stack(2,'ABC', '123',
'DEF', '456') as (item, number)
) s --your_table
lateral view posexplode(split(s.item,'')) i as pos, itm
lateral view posexplode(split(s.number,'')) n as pos, nbr
where i.itm!='' and n.nbr!='' and i.pos=n.pos ;
结果:
OK
item number
A 1
B 2
C 3
D 4
E 5
F 6
Time taken: 0.094 seconds, Fetched: 6 row(s)
hive>
更新:简化版
select i.itm as item, substr(s.number,i.pos+1,1) as number
from
(--replace this subquery with your table
--this is two rows example
select stack(2,'ABC', '123',
'DEF', '456') as (item, number)
) s --your_table
lateral view posexplode(split(s.item,'')) i as pos, itm
where i.itm!='';