MySql查看与修改auto_increment方法（转）

add by zhj:  在创建表时，如果没有显式的指定AUTO_INCREMENT的值，那它默认是1

原文：https://blog.****.net/fdipzone/article/details/50421831

查看表当前auto_increment

表的基本数据是存放在mysql的information_schema库的tables表中，我们可以使用sql查出

select auto_increment from information_schema.tables where table_schema='db name' and table_name='table name';

例子：查看 test_user 库的 user 表 auto_increment

mysql> select auto_increment from information_schema.tables where table_schema='test_user' and table_name='user';
+----------------+
| auto_increment |
+----------------+
|           1002 |
+----------------+
1 row in set (0.04 sec)

修改表auto_increment

alter table tablename auto_increment=NUMBER;

例子：修改 test_user 库 user 表 auto_increment为

mysql> alter table test_user.user auto_increment=10000;
Query OK, 0 rows affected (0.12 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> select auto_increment from information_schema.tables where table_schema='test_user' and table_name='user';
+----------------+
| auto_increment |
+----------------+
|          10000 |
+----------------+
1 row in set (0.04 sec)