declare @XML xml = '
<Profile>
<ID>20</ID>
<User>
<ID>BC4A18CA-AFB5-4268-BDA9-C990DAFE7783</ID>
<Name>somename</Name>
<Activities>
<Activity>
<Name>activity1</Name>
</Activity>
</Activities>
</User>
</Profile>'
declare @user_id nvarchar(50) = '20'
declare @activity_name nvarchar(50) = 'activity1'
declare @display_name nvarchar(50) = 'displayname1'
set @xml.modify('insert <DisplayName>{sql:variable("@display_name")}</DisplayName>
into (/Profile[ID = sql:variable("@user_id")]
/User/Activities/
Activity[Name = sql:variable("@activity_name")])[1]')
Resultat:
<Profile>
<ID>20</ID>
<User>
<ID>BC4A18CA-AFB5-4268-BDA9-C990DAFE7783</ID>
<Name>somename</Name>
<Activities>
<Activity>
<Name>activity1</Name>
<DisplayName>displayname1</DisplayName>
</Activity>
</Activities>
</User>
</Profile>