Here is the performance stats of the solution by patkinson for TSQL Challenge20.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 21 2010 11:33PM | 1127 | 0 | 16 | 0.0170 |
| 2 | Apr 22 2010 12:02AM | 1127 | 0 | 16 | 0.0160 |
| 3 | Apr 22 2010 12:32AM | 1127 | 0 | 16 | 0.0150 |
| 4 | Apr 22 2010 1:03AM | 1127 | 0 | 16 | 0.0140 |
| 5 | Apr 22 2010 1:33AM | 1127 | 0 | 16 | 0.0450 |