Php 需要在复制时使用新PK更新FK

我有两张桌子——今晚我真的相信我有一个金发女郎的时刻

标题 副标题 我想做的是复制标题和副标题中的所有条目，其中

TopicID

=1到=2

我写过：

INSERT INTO Headings (HeadingName, TopicID)
SELECT HeadingName, 2 FROM Headings WHERE TopicID = 1  //(Duplicating Headings and assigning TopicID 2).

我被困在

副标题上了

；我想输入刚刚创建的新的

HeadingID

，我不知道。我可以用相同的Insert/Select语句来处理其余字段，但我还是被难住了

有人能帮我举个例子或一些文档吗

简化数据如下所示：

HeadingID = 1
HeadingName = 'News'
TopicID = 1
HeadingID = 2
HeadingName = 'Sport'
TopicID = 1

SubHeadingID = 1
SubHeadingName = 'Local'
HeadingID = 1
SubHeadingID = 2
SubHeadingName = 'National'
HeadingID = 1
SubHeadingID = 3
SubHeadingName = 'International'
HeadingID = 1
SubHeadingID = 4
SubHeadingName = 'Baseball'
HeadingID = 2
SubHeadingID = 5
SubHeadingName = 'Cricket'
HeadingID = 2

---

以下查询将帮助您：）

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@jetgrrrl请让我知道上面的答案是否有帮助。谢谢OMG，我会在我醒来时测试它：DHi OMG，你的建议不起作用，但是加入给了我另一个想法（插入内联选择以获得headingid），我可以从那里得到：）谢谢！

INSERT INTO Headings (HeadingName, TopicID)
SELECT HeadingName, 2 FROM Headings WHERE TopicID = 1  //(Duplicating Headings and assigning TopicID 2).

HeadingID = 1
HeadingName = 'News'
TopicID = 1
HeadingID = 2
HeadingName = 'Sport'
TopicID = 1

SubHeadingID = 1
SubHeadingName = 'Local'
HeadingID = 1
SubHeadingID = 2
SubHeadingName = 'National'
HeadingID = 1
SubHeadingID = 3
SubHeadingName = 'International'
HeadingID = 1
SubHeadingID = 4
SubHeadingName = 'Baseball'
HeadingID = 2
SubHeadingID = 5
SubHeadingName = 'Cricket'
HeadingID = 2

INSERT INTO SubHeadings (SubHeadingName, HeadingID) 
SELECT subhdng.SubHeadingName, hdng.HeadingID 
FROM Headings hdng
INNER JOIN SubHeadings subhdng ON hdng.HeadingID = subhdng.HeadingID 
WHERE hdng.TopicID = 2