Here is the performance stats of the solution by jobacr for TSQL Challenge20.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 21 2010 11:22PM | 1876 | 0 | 31 | 0.0220 |
| 2 | Apr 21 2010 11:52PM | 1876 | 0 | 31 | 0.0230 |
| 3 | Apr 22 2010 12:22AM | 1876 | 0 | 31 | 0.0200 |
| 4 | Apr 22 2010 12:52AM | 1876 | 0 | 31 | 0.0310 |
| 5 | Apr 22 2010 1:22AM | 1876 | 0 | 31 | 0.0340 |