MySQl之视图view(代码）

删除视图

drop view if exists student_view;

修改视图

select student.student_id,student.name,avg(score.result),student.grade from score,student group by student.grade;

创建视图

create view student_view as select avg(score.result), student.grade from score,student group by student.grade;

查询视图
 

select * from student_view;

修改视图名称

rename table student_view to stu_view;