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 | 45055 | 7 | 312 | 0.475 |
| 2 | May 8 2010 12:32AM | 45055 | 7 | 390 | 0.579 |
| 3 | May 8 2010 12:49AM | 45055 | 7 | 297 | 0.522 |
| 4 | May 8 2010 1:05AM | 45055 | 7 | 343 | 0.446 |
| 5 | May 8 2010 1:22AM | 45055 | 7 | 312 | 0.443 |