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Answers and rating deltas for

How do I add up values for columns based on repeating row column value?

Author Votes Δ
Thorsten Kettner 2 +0.84
Thabiso Motswagole 0 -0.96
AlleXyS 0 -1.11
Mittal Patel 0 -0.58
Last visited: May 24, 2018, 5:52:57 AM