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Answers and rating deltas for
How to optimize the following oracle query to get the from and to country name in one join only?
| Author | Votes | Δ |
|---|---|---|
| Petro Semeniuk | 1 | +2.34 |
| HamoriZ | 1 | +3.15 |
| Walter Mitty | 0 | -0.12 |
| Alex Poole | 0 | -0.57 |
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