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Answers and rating deltas for
How can I prevent duplication without primary key in mysql
| Author | Votes | Δ |
|---|---|---|
| AKX | 2 | +0.34 |
| Jsowa | 1 | +1.63 |
| Pushpendra Kumar | 0 | -2.02 |
| vuzz | 0 | -2.36 |
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