How to replace values in xml from sql? - sql

Question

I have an xml in my SQL Server table like this:
<Category>
<Attributes>
<Attribute>
<Name>GeneratorOnBoard1</Name>
<Value>Yes</Value>
</Attribute>
<Attribute>
<Name>GeneratorOnBoard2</Name>
<Value>Yes</Value>
</Attribute>
</Attributes>
</Category>
I want to replace the value of GeneratorOnBoard1 from 'yes' to 'yes please'
but should not change the value of GeneratorOnBoard2.
If I use this:
declare #xml xml=''
select cast (replace (cast(#xml as nvarchar(max)), 'yes','yes please') as xml)
it might replace all the yes values.
What should I do?

Answer 1

Bit easy and alternative way is to use STUFF with PATINDEX as below
SELECT
STUFF(CAST(#xml AS NVARCHAR(MAX)),
PATINDEX('%Yes%', CAST(#xml AS NVARCHAR(MAX))), 3, 'Yes Please');

Answer 2

Have a look at using replace value of (XML DML).
declare #xml xml = '<Category>
<Attributes>
<Attribute>
<Name>GeneratorOnBoard1</Name>
<Value>Yes</Value>
</Attribute>
<Attribute>
<Name>GeneratorOnBoard2</Name>
<Value>Yes</Value>
</Attribute>
</Attributes>
</Category>';
set #xml.modify('replace value of (/Category
/Attributes
/Attribute[(Name/text())[1] = "GeneratorOnBoard1" and
(Value/text())[1] = "Yes"]
/Value/text())[1]
with "yes please"');