LeetCode Medium 1204 Wayfair Interview SQL Question with Detailed Explanation

In this video I solve and explain a medium difficulty leetcode SQL question using MySQL query. This question has been asked in Apple, Facebook, Amazon, Google, Adobe, Microsoft, Adobe interviews or what we popularly call FAANG interviews.
I explain the related concept as well. This question includes points to keep in mind to develop SQL queries.

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[expandingourselves]

with cte as
(
select person_id, person_name, turn, sum(weight) over (order by turn asc ) as ttl_wt
from Queue
order by turn asc )

select person_name from Queue
where turn = (select max(turn) from cte where ttl_wt <=1000 )

[GoodUser]

there is no requirement to write rows between unbounded preceding
instead sum(weight) over(order by turn) is enough

[mickyman]

with cte1 as(
select person_name, sum(weight) over(order by turn) as cumweight from Queue)
select last_value(person_name) over() as person_name from cte1 where cumweight<=1000 order by cumweight limit 1;

[AmanRaj-ufwx]

Hey, there is no need of between unbounded preceding and current row, also I have not find it any where which is used by (select person_name from (select person_name, weight, sum(weight) over (order by turn) as cul_sum
from queue)x
where cul_sum <= 1000
order by cul_sum desc
limit 1)
simple answer