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Answers and rating deltas for
Determine customers that have spent money at the company for the first time, each month (mySQL)
| Author | Votes | Δ |
|---|---|---|
| Madhur Bhaiya | 1 | +0.75 |
| Barmar | 1 | +0.62 |
| Rajat | 0 | -1.14 |
| forpas | 0 | -1.23 |
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