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Answers and rating deltas for

How to efficiently check if two columns in the same table is one-to-one mapping?

Author Votes Δ
BeanFrog 2 +3.75
Eric 1 -0.02
Vicky_Burnwal 1 +0.49
Jaydip Jadhav 1 -0.03
LUSAQX 0 -3.83
Last visited: Jan 18, 2017, 5:56:20 PM