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Answers and rating deltas for
I want to select two different columns from two tables based on another column by SQL
| Author | Votes | Δ |
|---|---|---|
| Spaceman Spiff | 1 | +4.26 |
| Stephen | 0 | -1.18 |
| Adam | 0 | -1.41 |
| spencer7593 | 0 | -0.21 |
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