Here is the performance stats of the solution by marekpow for TSQL Challenge20.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 21 2010 11:28PM | 23497 | 4 | 608 | 0.6910 |
| 2 | Apr 21 2010 11:58PM | 23501 | 0 | 608 | 0.7110 |
| 3 | Apr 22 2010 12:28AM | 23501 | 0 | 624 | 0.7400 |
| 4 | Apr 22 2010 12:58AM | 23501 | 0 | 609 | 0.7470 |
| 5 | Apr 22 2010 1:28AM | 23501 | 0 | 624 | 0.6330 |