# 语文最高分
mysql> select max(ch) '语文最大值' from stu;
+------------+
| 语文最大值 |
+------------+
| 88 |
+------------+
1 row in set (0.00 sec)
#求语文总分、语文平均分、语文最低分、总人数
mysql> select max(ch) 语文最高分,min(ch) 语文最低分,sum(ch) 语文总分,avg(ch) 语文平均分,count(*) 总人数 from stu;
+------------+------------+----------+------------+--------+
| 语文最高分 | 语文最低分 | 语文总分 | 语文平均分 | 总人数 |
+------------+------------+----------+------------+--------+
| 88 | 55 | 597 | 74.6250 | 9 |
+------------+------------+----------+------------+--------+
1 row in set (0.00 sec)