SQL way to get the MD5 or SHA1 of an entire row

Question

Is there a \"semi-portable\" way to get the md5() or the sha1() of an entire row? (Or better, of an entire group of rows ordered by all their fields, i.e. order by 1,2,3,

Answer 1

In MSSQL -- You can use HashBytes across the entire row by using xml..

SELECT MBT.id,
   hashbytes('MD5',
               (SELECT MBT.*
                FROM (
                      VALUES(NULL))foo(bar)
                FOR xml auto)) AS [Hash]
FROM  AS MBT;
You need the from (values(null))foo(bar) clause to use xml auto, it serves no other purpose..

                                                        

              
                
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