A.select max(age)from student B.select min(age)from student C.select sum(age)from student D.select avg(age)from student
A.select avg(score)from stu B.select max(score)from stu C.select min(score)from stu D.select sum(score)from stu
A.select * from student B.select name from student C.delete from student D.update name from student