php - 将 auto_increment 值设置为旧表项

Question

我在一个表中有两个字段（标题，内容），我插入了一些值......：

+--------------------------------------+--------------------------+
| title                                | content                  |
+--------------------------------------+--------------------------+
| hello word                           | this is my first content |
+--------------------------------------+--------------------------+
| smoke Smoking is bad for your health | But i love it            |
+--------------------------------------+--------------------------+

如果我添加一个名为ID的auto_increment字段，则之前输入的值取ID = 0：

+---+--------------------------------------+--------------------------+
|ID | title                                | content                  |
+---+--------------------------------------+--------------------------+
| 0 | hello word                           | this is my first content |
+---+--------------------------------------+--------------------------+
| 0 | smoke Smoking is bad for your health | But i love it            |
+---+--------------------------------------+--------------------------+

我需要这个：

+---+--------------------------------------+--------------------------+
|ID | title                                | content                  |
+---+--------------------------------------+--------------------------+
| 1 | hello word                           | this is my first content |
+---+--------------------------------------+--------------------------+
| 2 | smoke Smoking is bad for your health | But i love it            |
+---+--------------------------------------+--------------------------+

将正确 ID 设置为旧值的唯一方法是 php+foreach？或者我忘记了与 sql/mysql 有什么关系来更快地自动获取正确的 ID 值？

感谢帮助。

Answer 1

ALTER TABLE MyTable
ADD ID INT IDENTITY

Answer 2

好吧，现在是我帮助你的时候了：P。

您将 SQL 代码放在 php 页面或 phpmyadmin 在线代码编辑器中？有时 phpmyadmin 在线编辑器会失败，在您的 php 页面中尝试它，它工作正常。