Here is the performance stats of the solution by miweg for TSQL Challenge20.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 21 2010 11:30PM | 830 | 0 | 15 | 0.0180 |
| 2 | Apr 22 2010 12:00AM | 830 | 0 | 16 | 0.0130 |
| 3 | Apr 22 2010 12:30AM | 830 | 0 | 16 | 0.0130 |
| 4 | Apr 22 2010 1:00AM | 830 | 0 | 0 | 0.0120 |
| 5 | Apr 22 2010 1:30AM | 830 | 0 | 16 | 0.0290 |