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Answers and rating deltas for

What query do I run to select the HIGHEST value for EACH group of values in an SQL table?

Author Votes Δ
Jason McCreary 3 +0.98
Dustin Laine 2 -0.31
kuriouscoder 2 +0.90
Dan 1 -4.00
Last visited: Sep 14, 2014, 5:07:29 AM