tsql如何拆分xml并将它们作为行插入 [英] tsql how to split xml and insert them as rows

问题描述

这里有一个问题(如何使用 t-sql 更新 xml 变量中所有 xml 属性的值?)提问者想要将 xml 变量拆分为行.

There was a question here (How to update all xml attributes' value in an xml variable using t-sql?) where the questioner wanted to split an xml variable into rows.

我遇到了几乎相同的问题，但我将 xml 存储在表中.每行至少存储 1 个 xml 节点，有时更多.我想将它们拆分为单独的行，但似乎 .nodes('a') 需要一个标量变量.

I have almost the same problem, but I'm storing the xmls in a table. Every row stores at least 1 xml node, sometimes more. I want to split them to separate rows, but it seems like .nodes('a') needs a scalar variable.

这是我试过的:

declare @T table (XMLCol xml);

insert into @T values
('<a abb="122">
  <b></b>
 </a>
 <a abb="144">
  <b></b>
 </a>'),
 ('<a abb="222">
  <b></b>
 </a>
 <a abb="244">
  <b></b>
 </a>');

 select a.query('.') from @T.nodes('a') a(a);

我想要达到的目标:我有一张这样的桌子:

What I want to achieve: I have a table like this:

ID           XML
1            <a abb="122"><b></b></a><a abb="144"><b></b></a>
2            <a abb="222"><b></b></a><a abb="244"><b></b></a>

我想把它转换成这样:

ID           XML
1            <a abb="122"><b></b></a>
2            <a abb="144"><b></b></a>
3            <a abb="222"><b></b></a>
4            <a abb="244"><b></b></a>

为此，我想写一些像简单的东西

For that I want to write something that works like a simple

INSERT INTO table2 SELECT * FROM table1

你能帮我吗?

提前致谢！

推荐答案

试试这个(如果我正确理解了你的问题):

Try like this (if I understood your question correctly):

declare @xml xml = N'<a abb="122"><b></b></a><a abb="144"><b></b></a>'
select  @xml.query('/a/*') 

如果您希望每个 b 节点都显示为行，请使用:

If you want each b node to be shown as row, use this:

select x.items.query('.') from @xml.nodes('/a/b') as x(items) 

您可以像这样从表变量中获取数据:

You can get data from your table variable like this:

select tbl.vals
from @T as t
cross apply (select x.items.query('.') from t.XMLCol.nodes('/a') as x(items)) as tbl(vals)

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