Container -- reverse content -- use of explosion, splicing, and inversion functions

Table name ：t1

Table fields and contents ：

a

AB,CA,BAD

BD,EA

Question 1 ： Reverse comma separated data ： Change the order , The content remains the same

The output is as follows ：

BAD,CA,AB

EA,BD

select a,concat_ws(",",collect_list(reverse(str))) 
from ( 
select a,str from t1 lateral view explode(split(reverse(a),",")) t as str ) tmp1 
group by a;

Question two ： Reverse comma separated data ： Change content , The order is the same

The output is as follows ：

BA,AC,DAB

DB,AE

 

select a,concat_ws(",",collect_list(reverse(str))) 
from ( select a,str from t1 lateral view explode(split(a,",")) t as str ) tmp1
 group by a;