*

运算符说明

* 运算符用于乘法运算。

语法结构

> SELECT value1*value2;

> SELECT column1*column2... FROM table_name;

示例

mysql> select 1123.2333*1233.3331;
+-----------------------+
| 1123.2333 * 1233.3331 |
+-----------------------+
|    1385320.8079122303 |
+-----------------------+
1 row in set (0.01 sec)

create table t2(c1 int, c2 int);
insert into t2 values (-3, 2);
insert into t2 values (1, 2);

mysql> select c1*2 from t2;
+--------+
| c1 * 2 |
+--------+
|     -6 |
|      2 |
+--------+
2 rows in set (0.00 sec)

mysql> select c1*c2 from t2;
+---------+
| c1 * c2 |
+---------+
|      -6 |
|       2 |
+---------+
2 rows in set (0.01 sec)