如何更新sql中的xml字段表? [英] how to update a xml field table in sql?

问题描述

我在表中有一个 XML 列，如下所示:

I have a XML column in a table that looks like this:

<word A="al"   B="h"   C="Ps" />
<word A="has"  B="es"  C="Pf" /> 
<word A="mom"  B="es"  C="Ph" />

我想像这样更新这个字段:

I want to update this field like this:

<word A="al"   B="B1"   C="C1" /> 
<word A="has"  B="B2"  C="C1" /> 
<word A="mom"  B="B2"  C="C2" />

我想通过 SQL Server 中的一个函数来做.

I want to do by a function in SQL Server.

谢谢！

推荐答案

正如 Mikael 所说，您需要描述更新背后的逻辑.但是对于上面的预期输出，以下应该有效:

As Mikael states you need to describe the logic behind the update. But for the expected output above, the following should work:

DECLARE @Words xml
SELECT @Words = '
<word A="al"   B="h"   C="Ps" />
<word A="has"  B="es"  C="Pf" />
<word A="mom"  B="es"  C="Ph" />'

SET @Words.modify('replace value of(/word[@A = "al"]/@B)[1] with "B1"')
SET @Words.modify('replace value of(/word[@A = "al"]/@C)[1] with "C1"')
SET @Words.modify('replace value of(/word[@A = "has"]/@B)[1] with "B2"')
SET @Words.modify('replace value of(/word[@A = "has"]/@C)[1] with "C1"')
SET @Words.modify('replace value of(/word[@A = "mom"]/@B)[1] with "B2"')
SET @Words.modify('replace value of(/word[@A = "mom"]/@C)[1] with "C2"')

SELECT @Words

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