insert an element to nth element in a xml in Sql Server - sql

Question

please consider this XML:
<Employees>
<Person>
<ID>1000</ID>
<Name>Nima</Name>
<LName>Agha</LName>
</Person>
<Person>
<ID>1001</ID>
<Name>Ligha</Name>
<LName>Ligha</LName>
</Person>
<Person>
<ID>1002</ID>
<Name>Jigha</Name>
<LName>Jigha</LName>
</Person>
<Person>
<ID>1003</ID>
<Name>Aba</Name>
<LName>Aba</LName>
</Person>
</Employees>
I want to write a procedure that get a number and then I insert an element to nth Person element. for example if 1 pass to my procedure I insert an element to first person element.

Answer 1

DECLARE #data XML =
'
<Employees>
<Person>
<ID>1000</ID>
<Name>Nima</Name>
<LName>Agha</LName>
</Person>
<Person>
<ID>1001</ID>
<Name>Ligha</Name>
<LName>Ligha</LName>
</Person>
<Person>
<ID>1002</ID>
<Name>Jigha</Name>
<LName>Jigha</LName>
</Person>
<Person>
<ID>1003</ID>
<Name>Aba</Name>
<LName>Aba</LName>
</Person>
</Employees>
'
DECLARE #offset INT = 2
DECLARE #value VARCHAR(100) = 'newvalue'
SET #data.modify('insert <NewAttribute>{sql:variable("#value")}</NewAttribute> as last into (/Employees/Person)[sql:variable("#offset")][1]')
SELECT #data

Answer 2

DECLARE #AttributeValue NVARCHAr(100) = 'TestValue';
DECLARE #NodeNR INT = 3
DECLARE #XML XML = '<Employees>
<Person>
<ID>1000</ID>
<Name>Nima</Name>
<LName>Agha</LName>
</Person>
<Person>
<ID>1001</ID>
<Name>Ligha</Name>
<LName>Ligha</LName>
</Person>
<Person>
<ID>1002</ID>
<Name>Jigha</Name>
<LName>Jigha</LName>
</Person>
<Person>
<ID>1003</ID>
<Name>Aba</Name>
<LName>Aba</LName>
</Person>
</Employees>';
SET #XML.modify('insert attribute Attribute {sql:variable("#AttributeValue")} into (/Employees/Person[position()=sql:variable("#NodeNr")])[1]')

Answer 3

Try this one -
DECLARE #Param INT = 1000
DECLARE #NodeID INT = 2
DECLARE #XML XML = '
<Employees>
<Person>
<ID>1000</ID>
<Name>Nima</Name>
<LName>Agha</LName>
</Person>
<Person>
<ID>1001</ID>
<Name>Ligha</Name>
<LName>Ligha</LName>
</Person>
<Person>
<ID>1002</ID>
<Name>Jigha</Name>
<LName>Jigha</LName>
</Person>
<Person>
<ID>1003</ID>
<Name>Aba</Name>
<LName>Aba</LName>
</Person>
</Employees>'
DECLARE #SQL NVARCHAR(MAX) = '
DECLARE #XML XML = #XML_Param
DECLARE #Id INT = #Value_Param
SET #XML.modify(''insert attribute Id {sql:variable("#Id")} into (/Employees/Person)[' + CAST(#NodeID AS VARCHAR) + ']'')
SELECT #XML_Output = #XML'
DECLARE #Definition NVARCHAR(500) =
N'#XML_Param XML, #Value_Param INT, #Node_Param INT, #XML_Output XML OUTPUT'
DECLARE #XMLResult XML
EXEC sys.sp_executesql
#SQL
, #Definition
, #XML_Param = #XML
, #Value_Param = #Param
, #Node_Param = 1
, #XML_Output = #XMLResult OUTPUT
SELECT #XMLResult