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LeetCode-Solutions/MySQL/game-play-analysis-ii.sql at master · feiyunwill/LeetCode-Solutions · GitHub
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game-play-analysis-ii.sql
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#
Time: O(n)
#
Space: O(n)
SELECT
player_id,
device_id
FROM
activity
WHERE
( player_id, event_date )
IN
(
SELECT
player_id,
Min
(event_date)
FROM
activity
GROUP BY player_id
ORDER BY
NULL
)
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