MySql查看與修改auto_increment方法（轉）

add by zhj:  在創建表時，如果沒有顯式的指定AUTO_INCREMENT的值，那它默認是1

 

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

查看表當前auto_increment

表的基本數據是存放在mysql的information_schema庫的tables表中，我們可以使用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 庫的 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 庫 user 表 auto_increment為 10000

 

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)