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Answers and rating deltas for
Is it possible to constrain a table to have a value in only one of a set of columns
| Author | Votes | Δ |
|---|---|---|
| Bill Karwin | 4 | +0.54 |
| Philip Kelley | 1 | +1.43 |
| Rodrigo | 0 | -2.38 |
| Walter Mitty | 0 | -0.42 |
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