单项选择题
A.where B.group by C.ather D.limits
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
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