DIV

运算符说明

DIV 运算符用于整数除法。

如果两个运算数值都是非整数类型，则会将运算数值转换为 DECIMAL，并在将结果转换为 BIGINT 之前使用 DECIMAL 算法进行除法。如果结果超出 BIGINT 范围，则会发生错误。

语法结构

> SELECT value1 DIV value2;

> SELECT column1 DIV column2... FROM table_name;

示例

mysql> SELECT 5 DIV 2, -5 DIV 2, 5 DIV -2, -5 DIV -2;
+---------+----------+----------+-----------+
| 5 div 2 | -5 div 2 | 5 div -2 | -5 div -2 |
+---------+----------+----------+-----------+
|       2 |       -2 |       -2 |         2 |
+---------+----------+----------+-----------+
1 row in set (0.00 sec)

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

mysql> select c1 DIV 3 from t2;
+----------+
| c1 div 3 |
+----------+
|       -1 |
|        0 |
+----------+
2 rows in set (0.00 sec)

mysql> select c1 DIV c2 from t2;
+-----------+
| c1 div c2 |
+-----------+
|        -1 |
|         0 |
+-----------+
2 rows in set (0.00 sec)