order by
limit
delete from exam_record where submit_time is NULL&nbs***bsp;TIMESTAMPDIFF(minute,start_time,submit_time) < 5 order by start_time asc limit 3
delete from exam_record where submit_time is NULL&nbs***bsp;TIMESTAMPDIFF(minute,start_time,submit_time) < 5 order by start_time asc limit 3
牛客博客，记录你的成长
京公网安备 11010502036488号