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Answers and rating deltas for
Oracle 11g how I can group values from two different columns
| Author | Votes | Δ |
|---|---|---|
| Alex Poole | 5 | +0.70 |
| Radhe Shyam Courasiya | 4 | +2.94 |
| Matthew McPeak | 2 | -0.58 |
| Simion | 1 | -3.13 |
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