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Answers and rating deltas for
how can I group by elements from one table and group by it by 2 columns?
| Author | Votes | Δ |
|---|---|---|
| Juan Carlos Oropeza | 2 | -0.02 |
| Frankely Diaz | 2 | +0.17 |
Last visited: Jan 28, 2016, 1:40:56 PM