Here is the performance stats of the solution by DaveR - UK for TSQL Challenge23.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Jun 16 2010 11:50PM | 180 | 0 | 265 | 0.527 |
| 2 | Jun 17 2010 12:13AM | 180 | 0 | 234 | 0.314 |
| 3 | Jun 17 2010 12:35AM | 180 | 0 | 172 | 0.301 |
| 4 | Jun 17 2010 12:58AM | 180 | 0 | 187 | 0.279 |
| 5 | Jun 17 2010 1:21AM | 180 | 0 | 202 | 0.297 |