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Can somebody explain the running total and SQL self-join in this tutorial to me?
| Author | Votes | Δ |
|---|---|---|
| Joseph Mastey | 2 | +3.27 |
| user3041581 | 0 | 0.00 |
| Paddy | 0 | -0.41 |
Last visited: Sep 14, 2014, 5:07:29 AM