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What is the efficient way to group multiple columns of a table to get the output as shown?
| Author | Votes | Δ |
|---|---|---|
| LoztInSpace | 0 | +0.00 |
| Dheeraj Sharma | 0 | +0.31 |
| toonice | 0 | -0.32 |
Last visited: Jul 13, 2017, 8:00:22 PM