要求：

修改mysql中某张表的下一条记录的Auto_increment值。

操作方法：

查看db.table表的下一条记录auto_increment的值：

show table status from db like 'table';

例如：

复制代码 代码示例:

mysql> show table status from mailbox like 'mailbox';

+---------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+-

--------------------+---------------------+-------------------+----------+----------------+---------+

| Name    | Engine | Version | Row_format | Rows | Avg_row_length | Data_length | Max_data_length | Index_length | Data_free |Auto_increment| Create_time         |

Update_time         | Check_time          | Collation         | Checksum | Create_options | Comment |

+---------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+-

--------------------+---------------------+-------------------+----------+----------------+---------+

| mailbox | MyISAM |      10 | Dynamic    | 1681 |            148 |      249688 | 281474976710655 |       104448 |         0 |         15355| 2012-03-13 11:19:10 |

2012-03-13 11:19:10 | 2012-03-13 11:19:10 | latin1_swedish_ci |     NULL |                |         |

+---------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+-

--------------------+---------------------+-------------------+----------+----------------+---------+

1 row in set (0.00 sec)

Auto_increment：15355

这个就是下一条记录会使用的自增ID；

修改db.table表下一条记录使用的自增ID值为20000：

alter table db.table auto_increment=20000;

例如：

复制代码 代码示例:

mysql> alter table mailbox.mailbox auto_increment=20000;

Query OK, 1681 rows affected (0.05 sec)

这时再进行：

show table status from mailbox like 'mailbox';auto_increment已经变成20000；

新插入的记录，自增字段就会从20000开始；