题解 | #删除记录(二)#
删除记录(二)
http://www.nowcoder.com/practice/964c9f7fffbb4ab18b507cfed4111b4a
DELETE FROM exam_record WHERE submit_time IS NULL &nbs***bsp;TIMESTAMPDIFF(MINUTE, start_time, submit_time) < 5 ORDER BY start_time LIMIT 3;
删除记录(二)
http://www.nowcoder.com/practice/964c9f7fffbb4ab18b507cfed4111b4a
DELETE FROM exam_record WHERE submit_time IS NULL &nbs***bsp;TIMESTAMPDIFF(MINUTE, start_time, submit_time) < 5 ORDER BY start_time LIMIT 3;
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