mysql使用Max()函数返回最大值的例子

mysql> CREATE TABLE sales_rep(
    ->   employee_number INT,
    ->   surname VARCHAR(40),
    ->   first_name VARCHAR(30),
    ->   commission TINYINT
    -> );
Query OK, 0 rows affected (0.00 sec)

mysql> INSERT INTO sales_rep values(4,'Rive','Mongane',10);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO sales_rep values(5,'Smith','Mike',12);
Query OK, 1 row affected (0.00 sec)

mysql> SELECT MAX(commission) from sales_rep;  --//使用Max()函数返回最大值
+-----------------+
| MAX(commission) |
+-----------------+
|              12 |
+-----------------+
1 row in set (0.00 sec)

mysql> drop table sales_rep;
Query OK, 0 rows affected (0.00 sec)