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checksum in sql (ms sql server query)

I want to use checksum in sql query for improving performance of stored procedure. Before implementing checksum, i want to know what are the disadvantages of checksum in sql query  (sql 2008/2012).

Could you please tell me the disadvantages/drawback of checksum in sql?
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What are you talking about using a checksum to do? There isn't anywhere near enough information in your question.
It is easy. Just add the computed column based on a CHECKSUM and test the SP speed...

CHECKSUM is useful if you need to compare long data record change etc. More info: http://technet.microsoft.com/en-us/library/ms189788(v=sql.110).aspx

You should also look at BINARY_CHECKSUM and CHECKSUM_AGG.

Drawbacks: some data types are not suitable for CHECKSUM.
sqldba2013Author Commented:
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