Here is the performance stats of the solution by Ryan Randall for TSQL Challenge20.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 21 2010 11:38PM | 1892 | 0 | 32 | 0.0270 |
| 2 | Apr 22 2010 12:08AM | 1892 | 0 | 15 | 0.0270 |
| 3 | Apr 22 2010 12:38AM | 1892 | 0 | 31 | 0.0230 |
| 4 | Apr 22 2010 1:08AM | 1892 | 0 | 15 | 0.0230 |
| 5 | Apr 22 2010 1:38AM | 1892 | 0 | 15 | 0.0230 |