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Answers and rating deltas for
How do you join two tables based on one column unless it's null, in which case join based on two
| Author | Votes | Δ |
|---|---|---|
| Gordon Linoff | 3 | +1.61 |
| DRapp | 1 | -1.61 |
Last visited: Feb 29, 2016, 4:51:32 PM