题解 | 插入记录-先删除重复行再插入
插入记录(三)
https://www.nowcoder.com/practice/978bcee6530a430fb0be716423d84082
delete from examination_info where exam_id=9003; insert into examination_info(exam_id, tag, difficulty, duration, release_time) values(9003, 'SQL', 'hard', 90, '2021-01-01 00:00:00');