shafirmubarak (4/30/2014)
Yes, the unique enforcement would be absolute necessary.But i was not sure how surrogate key will be of use?
In some situations it will help performance to have a narrower index. But that's just a general observation. It's hard to be more specific with no details.
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
- Theodore Roosevelt
Author of:
SQL Server Execution Plans
SQL Server Query Performance Tuning