Here is the performance stats of the solution by Louis Hillebrand for TSQL Challenge20.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 21 2010 11:27PM | 1115 | 0 | 31 | 0.1340 |
| 2 | Apr 21 2010 11:57PM | 1115 | 0 | 63 | 0.0650 |
| 3 | Apr 22 2010 12:27AM | 1115 | 0 | 0 | 0.0650 |
| 4 | Apr 22 2010 12:57AM | 1115 | 0 | 31 | 0.1010 |
| 5 | Apr 22 2010 1:27AM | 1115 | 0 | 31 | 0.0870 |