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Answers and rating deltas for

SQL: Is a query like this OK or is there a more efficient way of doing it, like using a join?

Author Votes Δ
Oded 7 +1.74
Mark Canlas 3 +2.19
Ray 3 +1.13
Jordão 2 +1.40
Quassnoi 1 -1.37
Otávio Décio 1 -0.74
Jeff 1 -0.42
jspcal 1 -0.74
Last visited: Sep 14, 2014, 5:07:29 AM