Just a quick clarification:

SQL may consider 'SARAT' , 'Sarat' or 'sarat' as equals; depending on the Collation;

which means that you should use "...BINARY_CHECKSUM(LOWER('SARAT')..." ;

if simply using "...LOWER('SARAT')...", then you should add "...COLLATE Latin1_General_CS_AI...".

"_CS_" stands for Case-Sensitive...; by defaut the Collation is "_CI_" which means Case In-sensitive;

Gr8 answers from all of you!

Cisco.