Generate a hash for a set of rows in sql server

Question

Is there any way in SQL Server 2012 to generate a hash of a set of rows and columns?

I want to generate a hash, store it on the parent record. The when an update co

Answer 1

For single row hashes:

select HASHBYTES('md5', Name + Description + AnotherColumn)
FROM MyChildTable WHERE ParentId = 2

for table checksum:

select sum(checksum(Name + Description + AnotherColumn)*1.0)
FROM MyChildTable WHERE ParentId = 2