下面关于修改视图的SQL语句,那个是正确的。( )
A. alter view01 as select * from users order by age desc
B. alter view02 as select name,avg(score) as avgScore from studentScore
C. alter view03 as select top 10 id,name,password from admin order by id
D. alter view04 as select * from stuent,class where student.classid=class.classid order by class.classid