Compare two sets of XML data using XQuery in SQL Server

Question

Suppose I store employee data in a xml column in my log table. Sometimes data is also updated in the xml column from a stored procedure.

He

Answer 1

I am too late here !!! However I found that if employees XML as shown above has multiple records then the JOIN query with CTE returns incorrect results.

I have below XML input

DECLARE @XML1 XML
DECLARE @XML2 XML

SET @XML1 = 
' 

    
         keith 
         1005 
        12/02/1981
        ACC001
        10,500
    
    
         keith 
         1004 
        12/02/1981
        ACC001
        10,500
    

'

    SET @XML2 = 
    ' 
    
        
             keith 
             1005 
            12/02/1981
            ACC001
            10,500
        
        
             keith 
             1004 
            12/02/1981
            ACC001
            10,501
        
        
             keith1 
             10040 
            12/02/1981
            ACC001
            10,501
        
    
    '

I will use below query to find the difference

select  T.N.value('local-name(.)', 'nvarchar(100)') as NodeName,
T.N.value('.', 'nvarchar(100)') as Value
from @XML2.nodes('/NewDataSet/Employees/Employee/*') as T(N)

EXCEPT

select  T.N.value('local-name(.)', 'nvarchar(100)') as NodeName,
T.N.value('.', 'nvarchar(100)') as Value
from @XML1.nodes('/NewDataSet/Employees/Employee/*') as T(N)

Hope this helps !!!