法一： 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') 一个语句结束以后记得＋分号 法二： replace to examination_info (exam_id ,tag ,difficulty ,duration,release_time ) values(9003,"SQL","hard",90,'2021-01-01 00:00:00') replace 与insert into用法差不多，但是replace 是删除重复值（适用于有主键的这种）