mysql> select * from test1; +----+-----------+ | id | name      | +----+-----------+ |  1 | 陈兵辉    | |  2 | chen      | |  3 | chen      | |  4 | chen      | |  5 | chen      | |  6 | chen      | |  7 | chen      | |  8 | chen      | |  9 | chen      | | 10 | chen      | | 11 | chen      | +----+-----------+ 11 rows in set (0.00 sec) mysql> delete from test1 where id in (10,11,9); Query OK, 3 rows affected (0.03 sec) mysql> show create table test1;  CREATE TABLE `test1` (   `id` int(11) NOT NULL auto_increment,   `name` varchar(10) default NULL,   PRIMARY KEY  (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=<SPAN style="COLOR: #ff0000">12</SPAN> DEFAULT CHARSET=utf8 | mysql> exit; Bye [root@fsailing1 ~]# service mysqld restart 停止 MySQL：                                               [确定] 启动 MySQL：                                               [确定] [root@fsailing1 ~]# mysql -uroot -p Enter password: Welcome to the MySQL monitor.  Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.0.95 Source distribution Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> use test; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> show create table test1; | CREATE TABLE `test1` (   `id` int(11) NOT NULL auto_increment,   `name` varchar(10) default NULL,   PRIMARY KEY  (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=<SPAN style="COLOR: #ff0000">9</SPAN> DEFAULT CHARSET=utf8 |

mysql> select last_insert_id(); +------------------+ | last_insert_id() | +------------------+ |                0 | +------------------+ 1 row in set (0.00 sec)