Here is the performance stats of the solution by vamsi for TSQL Challenge20.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 21 2010 11:41PM | 1546 | 0 | 47 | 0.0480 |
| 2 | Apr 22 2010 12:11AM | 1546 | 0 | 47 | 0.0420 |
| 3 | Apr 22 2010 12:41AM | 1546 | 0 | 31 | 0.0420 |
| 4 | Apr 22 2010 1:11AM | 1546 | 0 | 31 | 0.0420 |
| 5 | Apr 22 2010 1:41AM | 1546 | 0 | 63 | 0.0710 |