Here is the performance stats of the solution by jchama for TSQL Challenge20.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 21 2010 11:22PM | 1149 | 0 | 16 | 0.0520 |
| 2 | Apr 21 2010 11:52PM | 1149 | 0 | 16 | 0.0180 |
| 3 | Apr 22 2010 12:22AM | 1149 | 0 | 15 | 0.0180 |
| 4 | Apr 22 2010 12:52AM | 1149 | 0 | 15 | 0.0170 |
| 5 | Apr 22 2010 1:22AM | 1149 | 0 | 15 | 0.0160 |