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LeetCode-Solutions/MySQL/exchange-seats.sql at master · feiyunwill/LeetCode-Solutions · GitHub
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exchange-seats.sql
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exchange-seats.sql
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#
Time: O(nlogn)
#
Space: O(n)
SELECT
s1
.
id
, COALESCE(
s2
.
student
,
s1
.
student
)
AS
student
FROM
seat s1
LEFT JOIN
seat s2
ON
((
s1
.
id
+
1
) ^
1
)
-
1
=
s2
.
id
ORDER BY
s1
.
id
;
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