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Answers and rating deltas for
how to combine two columns in mysql and make it as one column?
| Author | Votes | Δ |
|---|---|---|
| Razib Al Mamun | 1 | +4.09 |
| Rakesh Sojitra | 0 | -0.37 |
| Mohamed Nizar | 0 | +0.29 |
| Pranav MS | 0 | +0.08 |
| Saroj Shrestha | -1 | -4.09 |
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