是否可以使用子查询更新多行的多个字段？
cdu_user_progress:
------------------------------------------
|id |lesson_id |game_id |score |duration |
------------------------------------------
|1 |1 |0 |50 |2500 |
|1 |1 |1 |75 |2500 |
|1 |2 |0 |0 |10000 |
|1 |3 |0 |25 |1000 |
|1 |3 |1 |25 |40000 |
|1 |3 |2 |90 |3000 |
|1 |4 |0 |50 |5000 |
------------------------------------------
cdu_user_progress2
------------------------------------------
|id |lesson_id |game_id |score |duration |
------------------------------------------
|1 |1 |0 |0 |0 |
|1 |1 |1 |0 |0 |
|1 |2 |0 |0 |0 |
|1 |3 |0 |0 |0 |
|1 |3 |1 |0 |0 |
|1 |3 |2 |0 |0 |
|1 |4 |0 |0 |0 |
------------------------------------------
也许是这样的？
UPDATE cdu_user_progress2
SET
score = sq.score,
duration = sq.duration
FROM (
SELECT
up.lesson_id AS lesson_id,
up.game_id AS game_id,
up.score AS score,
up.duration AS duration
FROM
cdu_user_progress up
) sq
WHERE
lesson_id = sq.lesson_id AND
game_id = sq.game_id
出于本文的目的，我简化了表格和查询，但原理是相同的......
感谢任何帮助!
最佳答案
只需连接两个表:
UPDATE cdu_user_progress2 AS up2
JOIN cdu_user_progress AS up ON up2.lesson_id = up.lesson_id AND up2.game_id = up.game_id
SET up.score = up2.score, up.duration = up2.duration
关于mysql - 使用子查询更新多行的多个字段，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46248178/