Here is the performance stats of the solution by Mark for TSQL Challenge23.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Jun 17 2010 12:03AM | 93 | 0 | 156 | 0.248 |
| 2 | Jun 17 2010 12:25AM | 93 | 0 | 109 | 0.219 |
| 3 | Jun 17 2010 12:48AM | 93 | 0 | 109 | 0.246 |
| 4 | Jun 17 2010 1:11AM | 93 | 0 | 109 | 0.208 |
| 5 | Jun 17 2010 1:34AM | 93 | 0 | 109 | 0.210 |