Here is the performance stats of the solution by jeff.hadden for TSQL Challenge20.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 21 2010 11:21PM | 844 | 0 | 16 | 0.0200 |
| 2 | Apr 21 2010 11:50PM | 844 | 0 | 16 | 0.0130 |
| 3 | Apr 22 2010 12:20AM | 844 | 0 | 16 | 0.0130 |
| 4 | Apr 22 2010 12:50AM | 844 | 0 | 16 | 0.0130 |
| 5 | Apr 22 2010 1:21AM | 844 | 0 | 16 | 0.0130 |