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Answers and rating deltas for

Do I need to create surrogate key for my relationship table?

Author Votes Δ
HLGEM 5 +2.14
nvogel 4 +1.70
Steve Wellens 3 +1.01
Mikael Eriksson 3 +0.18
Ken Downs 2 -0.91
timdev 2 -0.93
9000 1 -2.07
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