1、count
select count(*) from student;
2、max
select max(age) from student;
3、min
select sname,min(age) from student;
4、sum
select sum(age) from student;
5、avg
select avg(age) from student;
1、count
select count(*) from student;
2、max
select max(age) from student;
3、min
select sname,min(age) from student;
4、sum
select sum(age) from student;
5、avg
select avg(age) from student;