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create table score (id int, score int); insert into score(id, score) values (1,40), (2,35), (3,70), (4,80), (5,90), (6,60), (7,100) select * from score
id
score
1
40
2
35
3
70
4
80
5
90
6
60
7
100
with cte as( select id, score, LEAD(score, 1) over(order by score desc) as prior_score, LEAD(id, 1) over(order by score desc) as other_student from score ), cte2 as ( select id,other_student, (score-prior_score) as diff from cte ) select top 1* from cte2 where diff is not null order by diff asc
id
other_student
diff
1
2
5