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Answers and rating deltas for
I don't understand the need for self-joins. Can someone please explain them to me?
| Author | Votes | Δ |
|---|---|---|
| user2870778 | 2 | +4.01 |
| MikkaRin | 1 | -4.01 |
Last visited: Sep 14, 2014, 5:07:29 AM