题解 | #删除记录(一)#
删除记录(一)
http://www.nowcoder.com/practice/d331359c5ca04a3b87f06b97da42159c
*知识点:TIMESTAMPDIFF时间比较函数的应用。BUT我不会
delete from exam_record where TIMESTAMPDIFF(minute,start_time,submit_time) < 5 and score < 60
删除记录(一)
http://www.nowcoder.com/practice/d331359c5ca04a3b87f06b97da42159c
delete from exam_record where TIMESTAMPDIFF(minute,start_time,submit_time) < 5 and score < 60
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