sql server - saving the FOR XML AUTO results to variable in SQL

Question

select @result=@input.query('*')
for xml raw,type  

Above statement will generate following alert:
Msg 6819, Level 16, State 3, Line 2
The FOR XML clause is not allowed in a ASSIGNMENT statement.

Answer 1

For example

DECLARE @xml_var XML  
SET @xml_var =  
(
  SELECT   *,
    (  
      SELECT *

      FROM Orders

      WHERE Orders.CustomerID=Customers.CustomerID

      FOR XML AUTO, TYPE

    )

  FROM Customers WHERE CustomerID='ALFKI'

  FOR XML AUTO, TYPE

)

refer to : http://blogs.msdn.com/sqlprogrammability/articles/576095.aspx