AMAZON Interview Question | SQL Intermediate Question 9

QUESTION - Remove all the reversed pair from the given table.
DDL Command :-
drop table tb1;
create table tb1(n int , m int);
insert into tb1
values(1,2),(2,3),(3,4),(2,1),(3,2),(5,6);
select * from tb1;
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[@zaravind4293]

Great work pls keep posted this type of interview questions

[@ajaykrishnanj5633]

select * from (
select *,ROW_NUMBER() over(partition by flagtab.concat order by n) as flag from (
select *,
case when n>m then CONCAT(n,m) else CONCAT(m,n) end as concat
from tb1) as flagtab)as new where new.flag=1