小编use*_*266的帖子

我偶然发现了一个非常奇怪的行为:

想象一下,我们有一个表客户:

MariaDB [connections]> describe customers;
+--------------+-------------+------+-----+---------+----------------+
| Field        | Type        | Null | Key | Default | Extra          |
+--------------+-------------+------+-----+---------+----------------+
| customerId   | int(11)     | NO   | PRI | NULL    | auto_increment |
| customerName | varchar(50) | NO   |     | NULL    |                |
+--------------+-------------+------+-----+---------+----------------+
2 rows in set (0.00 sec)

插入几个值:

insert into customers(customerName) values('Foo');
insert into customers(customerName) values('Bar');

然后删除所有内容并重置自动增量:

DELETE FROM customers;
ALTER TABLE customers AUTO_INCREMENT = 0;

现在,使用customerId = 0插入一个新值:

INSERT INTO customers(customerId,customerName) VALUES(0,'Site owner');

并看到结果: …