Here is the performance stats of the solution by zamkam for TSQL Challenge18.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 9 2010 12:03AM | 11 | 0 | 250 | 0.336 |
| 2 | Apr 9 2010 12:27AM | 11 | 0 | 234 | 0.441 |
| 3 | Apr 9 2010 12:51AM | 11 | 0 | 296 | 0.454 |
| 4 | Apr 9 2010 1:15AM | 11 | 0 | 250 | 0.521 |
| 5 | Apr 9 2010 1:40AM | 11 | 0 | 156 | 0.420 |