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Answers and rating deltas for
sql - How do I enforce a two-column constraint?
| Author | Votes | Δ |
|---|---|---|
| Thomas | 7 | +1.43 |
| Tom H. | 3 | +0.20 |
| SQLDev | 1 | -2.00 |
| Matthew Jones | 1 | -1.38 |
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