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题解 | #更新记录（二）#

关键词：未完成作答，所以应该是完成时间为空的值 update exam_record set submit_time ='2099-01-01 00:00:00' , score = 0 where start_time <'2021-09-01 00:00:00' and submit_ti...

Mysql

2022-01-29

0 342

题解 | #插入记录（三）#

关键词：无论是否存在（先做删除步骤在进行插入） delete from examination_info where exam_id=9003; insert into examination_info (exam_id,tag,difficulty,duration,release_time) v...

Mysql

2022-01-29

0 242