题解 | #删除记录(二)#
删除记录(二)
http://www.nowcoder.com/practice/964c9f7fffbb4ab18b507cfed4111b4a
题目包含两个条件,可以直接筛选排序并取前三
DELETE FROM exam_record
WHERE score is null or TIMESTAMPDIFF(MINUTE,start_time,submit_time)<5
order by start_time
limit 3
删除记录(二)
http://www.nowcoder.com/practice/964c9f7fffbb4ab18b507cfed4111b4a
题目包含两个条件,可以直接筛选排序并取前三
DELETE FROM exam_record
WHERE score is null or TIMESTAMPDIFF(MINUTE,start_time,submit_time)<5
order by start_time
limit 3
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