Here is the performance stats of the solution by dave ballantyne for TSQL Challenge19.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | May 8 2010 12:15AM | 45874 | 7 | 374 | 0.687 |
| 2 | May 8 2010 12:32AM | 45874 | 7 | 390 | 0.516 |
| 3 | May 8 2010 12:49AM | 45874 | 7 | 343 | 0.490 |
| 4 | May 8 2010 1:06AM | 45874 | 7 | 405 | 0.632 |
| 5 | May 8 2010 1:23AM | 45874 | 7 | 374 | 0.514 |