Declare @FirstCksum int
CREATE TABLE #myTable (column1 xml,column2 int); 
INSERT INTO #myTable VALUES ('<test></test>',109); 
select * from #mytable
SELECT @FirstCksum = BINARY_CHECKSUM(*) from #myTable; 
update #myTable set column1='<test>values</test>' where column2 = 109
select * from #mytable
SELECT Case when BINARY_CHECKSUM(*) = @FirstCksum
            then 'No Change'
            else 'Table Modified'
       end as TableChanged
from #myTable; 
DROP TABLE #myTable