Here is the performance stats of the solution by Waldar for TSQL Challenge18.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Apr 8 2010 11:48PM | 765 | 0 | 1170 | 1.664 |
| 2 | Apr 9 2010 12:12AM | 749 | 0 | 1154 | 1.712 |
| 3 | Apr 9 2010 12:37AM | 749 | 0 | 1186 | 1.707 |
| 4 | Apr 9 2010 1:01AM | 749 | 0 | 983 | 1.743 |
| 5 | Apr 9 2010 1:25AM | 749 | 0 | 1076 | 1.577 |