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Answers and rating deltas for
When sum up 2 columns in PostgreSQL, if one record is empty, the result is empty instead of return a
| Author | Votes | Δ |
|---|---|---|
| Lajos Arpad | 3 | +1.67 |
| Gordon Linoff | 1 | -1.14 |
| Raj | 0 | -4.24 |
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