Here is the performance stats of the solution by RSDerby for TSQL Challenge18.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 9 2010 12:02AM | 1312 | 0 | 1576 | 2.138 |
| 2 | Apr 9 2010 12:26AM | 1312 | 0 | 1450 | 2.150 |
| 3 | Apr 9 2010 12:51AM | 1312 | 0 | 1576 | 2.273 |
| 4 | Apr 9 2010 1:15AM | 1312 | 0 | 1404 | 2.081 |
| 5 | Apr 9 2010 1:39AM | 1312 | 0 | 1248 | 1.937 |