Here is the performance stats of the solution by JLSSCH for TSQL Challenge20.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 21 2010 11:21PM | 844 | 0 | 15 | 0.0180 |
| 2 | Apr 21 2010 11:51PM | 844 | 0 | 31 | 0.0180 |
| 3 | Apr 22 2010 12:21AM | 844 | 0 | 0 | 0.0170 |
| 4 | Apr 22 2010 12:51AM | 844 | 0 | 31 | 0.0180 |
| 5 | Apr 22 2010 1:21AM | 844 | 0 | 16 | 0.0190 |