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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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difference between primary key and unique key
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You can find detailed information from:
http://www.dotnet-tricks.com/Tutorial/sqlserver/V2bS260912-Difference-between-Primary-Key-and-Unique-Key.html
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