2020-02-16 标签:mysql,查询,中平,均分,最低,班级,实现,代码,如下,drop,table,exists,dd,create,user,id,int,class,n

实现代码如下：drop table if exists dd; create table dd ( user_id int , class_no int , score int ); insert into dd values (1,1,1), (2,1,1), (3,1,2), (4,2,2);