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Answers and rating deltas for

Is GROUP BY needed in the following correlated subquery?

Author Votes Δ
Erwin Brandstetter 4 +0.78
Florin Ghita 2 +0.85
werewindle 2 +0.48
Andomar 1 -0.95
Last visited: Sep 14, 2014, 5:07:29 AM