Skip to content

Done Mock_SQL3 #4

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Kaustubhk28 wants to merge 1 commit into
base: main
Choose a base branch
from
Open

Done Mock_SQL3 #4

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
40 changes: 40 additions & 0 deletions Mock_SQL3.sql
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,40 @@
# Solution
with cte as
(
select *,
(
case
when first_score > second_score then first_score
when first_score < second_score then second_score
when first_score = second_score and first_player < second_player then first_score
when first_score = second_score and first_player > second_player then second_score
end
) as high_score,
(
case
when first_score > second_score then first_player
when first_score < second_score then second_player
when first_score = second_score and first_player < second_player then first_player
when first_score = second_score and first_player > second_player then second_player
end
) as high_score_player_id

from Matches
),
cte2 as
(
select p1.group_id, c.first_player, c.second_player, c.first_score, c.second_score, c.high_score, c.high_score_player_id,
dense_rank() over(partition by p1.group_id order by c.high_score desc) as ranks
from cte c
join Players p1
on p1.player_id = c.first_player
union
select p2.group_id, c.first_player, c.second_player, c.first_score, c.second_score, c.high_score, c.high_score_player_id,
dense_rank() over(partition by p2.group_id order by c.high_score desc) as ranks
from cte c
join Players p2
on p2.player_id = c.second_player
)
select group_id, high_score_player_id as player_id
from cte2
where ranks = 1