Use of xml.modify to insert parameters into specific element of an xml column

Question

I would like to use a stored procedure to insert some values passed in as parameters into elements in the xml of a column. I have this so far The following parameters:

Answer 1

Not sure I fully understand your logic, but you can insert into xml using sql:variable with curly brackets eg

DECLARE @profiles_xml xml

set @profiles_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>'


SELECT 'before' s, DATALENGTH(@profiles_xml) dl, @profiles_xml

DECLARE @user_id CHAR(36), @activity_name NVARCHAR(MAX), @display_name NVARCHAR(MAX)
SELECT @user_id = 'BC4A18CA-AFB5-4268-BDA9-C990DAFE7783', @activity_name = 'TEST ACTIVITY NAME', @display_name = 'TEST DISPLAY NAME'

SET @profiles_xml.modify('
    insert <Activity><Name>{sql:variable("@activity_name")}</Name><DisplayName>{sql:variable("@display_name")}</DisplayName></Activity>
    as first
    into (/Profile/User/Activities)[1]')

SELECT 'after' s, DATALENGTH(@profiles_xml) dl, @profiles_xml

Answer 2

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]')

Result:

<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>

Answer 3

Try this

declare @ins xml 
    '<Activity><Name>'+
    @activity_name+
    '</Name><DisplayName>'
    +@display_name+
    '</DisplayName></Activity>'
SET @devices_xml.modify('
    insert sql:variable("@ins") into (/Profile[ID=sql:variable("@user_id")]/User/Activities)[1]')

Or

SET @devices_xml.modify('
      insert <Activity>
             <Name>{sql:variable("@activity_name")}</Name>
             <DisplayName>{sql:variable("@display_name")}</DisplayName>
             </Activity> 
      into (/Profile[ID=sql:variable("@user_id")]/User/Activities)[1]'    )