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Answers and rating deltas for
Is it OK to use 2 foreign keys in a table, one of which must be null?
| Author | Votes | Δ |
|---|---|---|
| Gordon Linoff | 2 | +0.40 |
| Javide | 1 | -3.20 |
Last visited: Sep 14, 2014, 5:07:29 AM