Mysql中设置自增长起始值和递增值

1.查询默认配置

mysql> show variables like 'auto_inc%';
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| auto_increment_increment | 1 |
| auto_increment_offset | 1 |
+--------------------------+-------+
2 rows in set (0.00 sec)

auto_increment_increment 是mysql增长的起始值，默认值为1；
auto_increment_offset 是mysql的递增值，即每次增长几，默认值为1；

2.修改相关配置

修改增长起始值：

mysql> set @@auto_increment_increment=10;
Query OK, 0 rows affected (0.00 sec)

mysql> show variables like 'auto_inc%';
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| auto_increment_increment | 10 |
| auto_increment_offset | 1 |
+--------------------------+-------+
2 rows in set (0.00 sec)

修改递增值：

mysql> set @@auto_increment_offset=2;
Query OK, 0 rows affected (0.00 sec)

mysql> show variables like 'auto_inc%';
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| auto_increment_increment | 10 |
| auto_increment_offset | 2 |
+--------------------------+-------+
2 rows in set (0.00 sec)

注：修改配置整个数据库都会受到影响，不是某个库或表