选择结果集的几列作为 XML [英] Selecting few columns of a result set as XML

问题描述

我有一个简单的 SELECT 语句，它从单个表中选择几列:

I have a simple SELECT statement which selects few columns from a single table:

SELECT id, name, phone, address 
FROM tmp_user

是否可以更改此查询，以便只有 id 和 name 位于选择中，而其余详细信息位于 xml 节点中?

Is it possible to change this query so that only id and name are in select and remaining details are in a xml node?

我希望这个选择的输出应该是

I expected output of this select should be

id  name        extra data
1   Shreedhar   <data><phone>...</phone><address>...</address></data>
2   John Doe    <data><phone>...</phone><address>...</address></data>
3   Jane Doe    <data><phone>...</phone><address>...</address></data>

返回表的最后一列应该是带有所需数据的 XML 类型.我知道如何使用 FOR XML 将整个结果集转换为 XML.但是，我只查找要转换的部分列.可能吗?

The last column is of the returned table should be of XML type with required data. I know how the entire result set can be converted to XML using FOR XML. However I am looking only for part of the columns to be converted. Is it possible?

推荐答案

好的！没问题 - 试试这样的:

Sure! No problem - try something like this:

SELECT 
    id, name,
    (SELECT phone, address
     FROM dbo.tmp_user u2
     WHERE u2.id = u1.id
     FOR XML PATH('data')) AS 'ExtraData'
FROM    
   dbo.tmp_user u1

这给了我一个非常像你正在寻找的输出.

This gives me an output pretty exactly like the one you're looking for.

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