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Answers and rating deltas for
How to write SQL query for following scenario
| Author | Votes | Δ |
|---|---|---|
| Gordon Linoff | 4 | +0.96 |
| mohan111 | 0 | -0.12 |
| Akshey Bhat | 0 | -0.66 |
| tinto | 0 | -1.43 |
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