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Answers and rating deltas for
MySQL SQL how to achieve this output? selecting a column from another table
| Author | Votes | Δ |
|---|---|---|
| Nishant Gupta | 0 | +1.84 |
| Ilyes GHOMRANI | 0 | +2.09 |
| Siva Prasanth | -1 | -3.93 |
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