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Answers and rating deltas for

How to join 3 table with this condition?

Author Votes Δ
Mudassir Hasan 1 +0.55
Oriesok Vlassky 0 -0.02
A4 Page 0 -0.08
Joseph Callaars 0 -0.20
Fabien -1 -4.07
Last visited: Sep 14, 2014, 5:07:29 AM