如何在 AWS Athena 或 python 中将列转换为行？

Question

Please consider this table:

ID	Name	Sector
1/2/5/3/4	NA/SA/TE/CV/BA	0/0/1953525168/0/0

I want to convert this table to this one:

ID	Name	Sector
1	NA	0
2	SA	0
5	TE	1953525168
3	CV	0
4	BA	0

...

How I can do this in appropriate way?

Answer 1

You can use split 's into unnest :

-- sample data
WITH dataset (ID, Name, Sector) AS (
    VALUES ('1/2/5/3/4', 'NA/SA/TE/CV/BA', '0/0/1953525168/0/0')
)

-- query
select t.*
from dataset
,unnest (split(ID, '/'), split(Name, '/'), split(Sector, '/')) as t(ID, Name, Sector);

Output:

ID	Name	Sector
1	NA	0
2	SA	0
5	TE	1953525168
3	CV	0
4	BA	0