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;
标签:count,聚合,函数,min,max,age,student,SQL,select From: https://www.cnblogs.com/shixiaogu/p/17243448.html