auto increment

The ID is set to auto-increment and is used as the primary key.

ID 被设置为自动增量并作为主键。

It is common for relational databases to use the concept of primary keys, generated by an auto-increment feature or by a sequence generator.

在关系数据库中通常可以使用主键，它由一个自动递增特性或序列生成器生成。

Problem 2: Not using auto-increment functionality

问题 2：不使用自动增量功能

3.1.4 Auto increment and decrement

3.1.4自动递增和递减

Includes auto increment in the table with this option is on.

勾选此选项，自动增量信息也被转换输出。

The Discussion on the Use of Auto-Increment 、 Auot-Decrement Operator

关于自增、自减运算符使用的探讨

The automatic index on the primary key takes care of the index required by AUTO _ INCREMENT.

从楼上的话来看,应该是鉴于自增长的主键的索引需求,会自动在其上建索引.