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Answers and rating deltas for
Using SQL, what is the correct way to total columns from multiple tables into common groups?
| Author | Votes | Δ |
|---|---|---|
| Kahn | 3 | +4.10 |
| gvee | 2 | +0.24 |
| par | 0 | -1.98 |
| Juan | 0 | -1.80 |
| John Wesley Gordon | 0 | -1.87 |
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