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Answers and rating deltas for

How do I create a unique constraint that also allows nulls?

Author Votes Δ
Vincent Buck 504 +4.93
Jose Basilio 17 +2.22
ErikE 8 0.00
Quassnoi 4 +0.43
Lieven Keersmaekers 3 -0.93
Mike Taylor 3 0.00
Howard 2 0.00
Marc Gravell 2 -1.11
Michael Brown 0 0.00
Last visited: Sep 14, 2014, 5:07:29 AM