MySQL 自动增量如何工作?
我刚刚使用 MySQL 查询浏览器创建了一个新表，并注意到 Auto Increment Column 下有一个勾号.这是如何运作的?
I was just creating a new table using MySQL Query Browser, and noticed there's a tick under Auto Increment Column. How does that work?
以编程方式添加到数据库时，我是否只添加一个数字，然后数据库自动增加该数字?
When adding to the database programatically, do I just add a number, and then the database automatically increments that number?
每次有新用户在我的网站上注册时，我都希望他们的客户 ID(仅限整数)自动递增，因此我不必尝试随机生成唯一编号.
Everytime a NEW user registers on my site, I want their Customer ID (integer only) to auto increment, so I don't have to try and randomly generate a unique number.
这可以简单地完成吗?
谢谢！
以编程方式添加到数据库时，我是否只添加一个数字，然后数据库自动增加该数字?
When adding to the database programatically, do I just add a number, and then the database automatically increments that number?
是的，这就是 auto_increment 的工作方式.
Yes, that's the way auto_increment works.
每行增加一个值
The value will be incremented for each new row
值是唯一的，不可重复
如果某行被删除，该行的auto_increment列不会被重新赋值.
If a row is deleted, the auto_increment column of that row will not be re-assigned.
最后插入行的auto_increment值可以使用mySQL函数LAST_INSERT_ID()访问，但它必须被调用在插入查询之后，在同一个数据库连接中
The auto_increment value of the last inserted row can be accessed using the mySQL function LAST_INSERT_ID() but it must be called right after the insert query, in the same database connection