Here is the performance stats of the solution by reganwick for TSQL Challenge21.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | May 26 2010 3:50PM | 74294 | 340 | 2589 | 3.869 |
| 2 | May 26 2010 4:52PM | 74295 | 347 | 2496 | 2.696 |
| 3 | May 26 2010 5:40PM | 74295 | 347 | 2449 | 2.638 |
| 4 | May 26 2010 6:28PM | 74294 | 340 | 2590 | 2.884 |
| 5 | May 26 2010 7:17PM | 74295 | 347 | 2480 | 2.704 |