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Answers and rating deltas for
How can I return null if columns have not values
| Author | Votes | Δ |
|---|---|---|
| Rajesh-Systematix | 0 | +3.85 |
| Muhammad Saqlain | 0 | -0.00 |
| Jeroen van Langen | 0 | -0.21 |
| daniell89 | 0 | -1.16 |
| NikhilGoud | 0 | -0.97 |
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